Mobile Device Power
Supports compatible laptops, tablets, phones and other equipment when their actual power demand stays within the inverter and vehicle limits.
ERAYAK 400W Car Power Inverter, 12V DC to 110V AC Converter with USB-C Charging
ERAYAK 400W Car Power Inverter, 12V DC to 110V AC Converter with USB-C Charging
Sale price$59.00 USD
Regular price$89.00 USD
Description
ERAYAK TANK-400
Portable AC Power for the Road 400W Continuous · 800W Peak
Convert 12V DC vehicle power into 120V AC output, with dual AC outlets, two USB-A ports and one 18W USB-C port in a compact 1.2 lb design.
400WContinuous output
800WPeak power
12V DCVehicle input
120V ACOutput voltage
1.2 lbPortable weight
Flexible Output
AC Power and USB Charging in One Unit
Connect compatible AC and USB devices while keeping the total running load and startup demand within the inverter’s ratings.
Five Ways to Connect
Use the dual AC outlets for compatible 120V equipment and the USB ports for direct charging.
2× ACUS-standard 120V AC outlets
2× USB-A5V output, 3.1A maximum shared total
18W USB-COne fast-charge port for compatible devices
400W / 800WContinuous and peak output ratings
Power Within Reach
Compact enough for a glove box, backpack or center console so AC and USB power can travel with you.
Backup for Compatible Gear
Useful for charging and powering compatible equipment during road trips, mobile work and temporary power interruptions.
Protection & Cooling
Replaceable Fuses and Temperature-Aware Cooling
The fuse inventory protects both sides of the power connection, while the smart fan adjusts according to temperature to manage heat and noise.
2×25A Installed FusesUser-replaceable inverter fuses installed in the unit.
2×25A Spare FusesMatching replacement fuses included in the package.
2×20A Plug FusesIncluded for the 12V adapter fuse system.
2×10A Plug FusesAdditional included 12V adapter fuse option.
Smart Cooling FanAdjusts fan speed according to operating temperature.
Automatic ProtectionIncludes overload, overheat, voltage and short-circuit response.
Lightweight Design
Listed weight is 1.2 lb, equivalent to 545 g.
Compact Length
Overall dimensions are 7.3 × 4.2 × 1.1 inches.
Cooling That Responds
Fan speed adjusts with temperature to balance cooling and operating noise.
Specifications & Package
TANK-400 Product Details
Core product specifications and included items for installation, replacement and everyday use.
What’s in the Box
- 1× ERAYAK TANK-400 car power inverter
- 2×25A installed fuses
- 2×25A spare fuses
- 2×20A fuses for the 12V adapter
- 2×10A fuses for the 12V adapter
- 1× user manual
Before Connecting Equipment
- Check the device’s running wattage.
- Confirm startup or heating-element demand.
- Keep continuous demand within 400W.
- Confirm the vehicle outlet and fuse are rated for the required load.
- Use only the specified replacement fuse type and rating.
| Model | ERAYAK TANK-400 car power inverter |
|---|---|
| Input | 12V DC |
| Output | 120V AC |
| Power | 400W continuous / 800W peak |
| AC Outlets | 2× US-standard outlets |
| USB-A | 2× ports, 5V / 3.1A maximum total |
| USB-C | 1× 18W fast-charge port |
| Cooling | Auto-regulating smart fan |
| Dimensions | 7.3 × 4.2 × 1.1 inches |
| Weight | 1.2 lb / 545 g |
| Protection | Overheat, short-circuit, low-voltage, overvoltage, overload and temperature-based automatic shutoff |
| Warranty | 3 years |
Vehicle Power & Load Safety
A vehicle’s 12V accessory outlet and fuse may be rated below the inverter’s maximum output. The vehicle limit remains the controlling limit.
- Check the vehicle manual and 12V outlet fuse rating before connecting high-wattage equipment.
- Do not assume every vehicle accessory outlet can supply the full 400W continuous output.
- Keep ventilation openings clear and use the inverter in a dry, well-ventilated location.
- Check both running wattage and startup demand before connecting a tool, compressor or heated appliance.
- Disconnect the inverter before replacing a fuse, and use only the specified fuse rating.
- Do not rely on the inverter as the sole power source for medical-critical equipment.
Buyer Questions
TANK-400 FAQ
Important checks before using the inverter with a vehicle outlet or connected device.
Can every vehicle 12V outlet deliver 400W?
No. Vehicle accessory outlets and their fuses have model-specific current limits. Check the vehicle manual and outlet rating; use the lower of the vehicle limit and inverter rating.
What is the difference between 400W and 800W?
400W is the stated continuous output rating. 800W is the stated peak rating for short-duration startup demand. Connected equipment must remain within both limits.
Can it power a heated blanket, curling iron or power tool?
Only if the device’s actual running wattage and startup demand fit both the inverter and vehicle outlet limits. Heated appliances and tools vary widely, so check the product label before use.
How much USB charging is available?
The two USB-A ports provide up to 3.1A maximum total. The separate USB-C port is rated at 18W for compatible devices.
How does the smart fan work?
The fan automatically adjusts its speed according to operating temperature, helping manage heat while reducing unnecessary fan noise.
Which replacement fuses are included?
The package lists two spare 25A inverter fuses, plus two 20A and two 10A fuses for the 12V adapter. Two 25A fuses are installed in the inverter.
Three-Year Warranty Support
The TANK-400 is listed with a 3-year warranty. Coverage remains subject to the applicable warranty terms, product condition and purchase channel.
3 Year Warranty
Warranty
| Warranty & Support | Coverage Details |
|---|---|
| Warranty Duration | 1-Year Limited Warranty for eligible ERAYAK TANK400 purchases, subject to applicable warranty terms, proof of purchase, product condition, and technical verification. |
| Warranty Coverage | Coverage applies to eligible manufacturing defects and product malfunctions that occur under normal use during the applicable warranty period. |
| Technical Diagnosis | ERAYAK Technical Support may assist with troubleshooting issues such as no power output, low-voltage shutdown, over-voltage shutdown, overload or short-circuit shutdown, over-temperature shutdown, fuse issues, cooling problems, and 12V input connection problems before confirming the appropriate warranty solution. |
| Replacement Parts Support | For eligible warranty issues, ERAYAK may provide applicable replacement parts, troubleshooting assistance, or other appropriate service solutions after technical verification and warranty review. |
| Fuse Support | The TANK400 uses user-replaceable fuses. ERAYAK Support can assist with fuse identification, replacement guidance, and troubleshooting when a fuse-related issue occurs. |
| 12V Connection Support | Support is available for the cigarette-lighter cable, battery-clamp connection, threaded positive and negative terminals, and related 12V power-input troubleshooting. |
| Technical Support | ERAYAK provides assistance with product setup, 11–15V DC compatibility, cigarette-lighter and battery-clamp connections, load planning, modified sine wave compatibility, fault diagnosis, fuse questions, and operating guidance for the TANK400. |
| Email Support | support@erayakpower.com Customers may submit proof of purchase, order information, photos, videos, product details, and a description of the issue for technical review. |
| English Phone Support | +1 (573) 455-4565 English-speaking support is available for setup, troubleshooting, warranty questions, replacement-part assistance, and after-sales service. |
| WhatsApp Support | +1 (573) 455-4565 Contact ERAYAK via WhatsApp for convenient technical and after-sales assistance. |
| Warranty Claim Process | Contact ERAYAK Support with your proof of purchase, product model, order information, and a description of the issue. Photos, videos, connected-device information, battery details, connection method, or troubleshooting results may be requested before the appropriate warranty solution is confirmed. |
| Proper Use Requirement | Warranty service is subject to proper operation with a compatible 11–15V DC power source, correct polarity, adequate ventilation, appropriate connected loads, and operation within the TANK400's 400W continuous / 800W peak output limits. |
| Cigarette-Lighter Use Requirement | When using the vehicle cigarette-lighter connection, keep the connected load at or below 150W. For loads above 150W, use the supplied battery clamps as instructed in the TANK400 user guide. |
| Service & Repair | Do not perform unauthorized internal repairs or modifications. If the inverter, cables, terminals, clamps, cooling fan, or housing show serious damage, discontinue use and contact ERAYAK Support or qualified service personnel. |
Warranty Note: Warranty service is subject to the applicable ERAYAK warranty terms, proof of purchase, proper operation and maintenance, technical verification, and applicable exclusions. Misuse, incorrect polarity, incompatible input voltage, excessive load, improper cigarette-lighter use, blocked ventilation, moisture exposure, unauthorized modification or repair, physical damage, or other operation outside the TANK400 user guide may affect warranty eligibility.
Shipping Policy
| U.S. Shipping | Details |
|---|---|
| U.S. Warehouses | ERAYAK provides local U.S. fulfillment from warehouses in California, New Jersey, and Georgia. |
| Order Processing | Most orders are confirmed and prepared for shipment within 24 hours after order verification. |
| Tracking Number | A tracking number is provided after the order is shipped so customers can follow the delivery status online. |
| Standard Delivery | Most standard orders are estimated to arrive within 2–4 business days after shipment. |
| Expedited Processing | Expedited service is available for eligible orders. Expedited orders receive priority order confirmation, faster warehouse processing, and priority logistics handling. |
| 2-Business-Day Delivery Option | A 2-business-day delivery option may be available for eligible products and destinations. Availability and any additional shipping charges should be confirmed before ordering. |
| Shipping Coverage | Delivery is available across most locations within the contiguous United States. |
| Hawaii & Offshore Areas | For Hawaii, U.S. islands, offshore territories, or other locations outside the contiguous United States, please contact ERAYAK Support before placing your order to confirm shipping availability and cost. |
| Warehouse Assignment | Orders are fulfilled from the most suitable U.S. warehouse based on product availability and the customer's delivery location. |
| Shipping Support | Email: support@erayakpower.com Phone: +1 (573) 455-4565 WhatsApp: +1 (573) 455-4565 |
Shipping Note: Delivery times are estimates and may vary based on inventory availability, destination, carrier conditions, weather, holidays, and other logistics factors. For urgent, remote-area, or special delivery requests, contact ERAYAK Support before placing your order.
Specifications
| Specification | Details |
|---|---|
| Series Name | ERAYAK TANK400 |
| Product Type | 400W Car Power Inverter |
| Power Capacity | 400W Continuous, 800W Peak |
| DC Input Voltage | 11–15V DC |
| Compatible Power Source | Compatible 12V Vehicle DC System or 12V Battery |
| AC Output Voltage | 120V ±10V AC |
| AC Output Frequency | 60Hz |
| AC Output Waveform | Modified Sine Wave |
| AC Outlets | 2 × 120V AC Outlets |
| USB Ports | 2 × USB-A + 1 × USB-C |
| USB Output Voltage | 5V DC |
| USB Output Current | 3.1A Shared |
| Vehicle Input Option | 12V Cigarette-Lighter Cable |
| Battery Input Option | Positive (+) / Negative (-) Battery Clamps |
| Threaded Input Terminals | Positive (+) / Negative (-) Threaded Terminal Connectors with Covers |
| Cigarette-Lighter Load Limit | Keep Connected Load at or Below 150W When Using the Vehicle Cigarette-Lighter Connection |
| Higher-Power Connection | Use the Supplied Battery Clamps for Loads Above 150W |
| Short-Circuit Protection | Yes |
| Low-Voltage Protection | Yes |
| Over-Voltage Protection | Yes |
| Over-Temperature Protection | Yes |
| Overload Protection | Yes |
| Leakage Protection | Yes |
| Cooling Method | Built-In Cooling Fan |
| Maximum Continuous Load | 400W |
| Maximum Peak Output | 800W |
| Ventilation Clearance | Minimum 3 Inches Around the Inverter During Use |
| Replaceable Fuses | User-Replaceable |
| Included Fuses | 2 × 10A Fuses + 2 × 20A Fuses |
| Dimensions | 7.3 × 4.2 × 1.1 in / 18.5 × 10.6 × 6.0 cm |
| Weight | 1.2 lb / 0.52 kg |
| Included Power Accessories | 12V Cigarette-Lighter Cable + Positive / Negative Battery Clamp Cable |
Performance Note: Actual operation depends on connected load, startup surge, battery condition, input voltage, ambient conditions, ventilation, and connection method. When using the cigarette-lighter connection, keep the load at or below 150W. For loads above 150W, use the supplied battery clamps. Always verify device wattage and modified sine wave compatibility before use.
Power Efficiency
1. Practical 400W Power
The TANK400 provides up to 400W of continuous AC power and 800W peak output for compatible electronics used in vehicle and 12V battery-powered applications.
2. Two Power-Input Options
Use the cigarette-lighter connection for lower-power vehicle applications or connect directly to a compatible 12V battery with the supplied clamps when higher power is required.
3. Battery-Conscious Operation
Low-voltage protection automatically shuts down the inverter when input voltage falls below a safe level, helping protect the connected battery from excessive discharge.
4. Smart Load Management
When using the vehicle cigarette-lighter connection, keep the connected load at or below 150W. For loads above 150W, switch to the supplied battery clamps for more appropriate power delivery.
5. AC + USB Power in One Unit
Two 120V AC outlets, two USB-A ports, and one USB-C port provide multiple connection options for compatible electronics from one compact 12V power solution.
Built for Reliability
1. Short-Circuit Protection
Automatically shuts down the TANK400 when a short circuit is detected, helping protect both the inverter and connected devices.
2. Low-Voltage Protection
Helps protect the connected battery from excessive discharge by shutting down the inverter when input voltage falls below a safe operating level.
3. Over-Voltage Protection
Automatically shuts down the inverter when input voltage exceeds a safe level, helping protect the inverter and connected equipment.
4. Over-Temperature Protection
Monitors inverter temperature and automatically shuts the unit down if it becomes too hot, helping protect internal components.
5. Overload Protection
Automatically shuts down the inverter when connected power demand exceeds its rated capacity.
6. Leakage Protection
Detects unintended electrical current leakage and automatically shuts down the inverter to help reduce electrical hazards caused by insulation failure or other faults.
7. User-Replaceable Fuse Protection
User-replaceable fuses provide an additional serviceable protection component for everyday vehicle and battery-powered use.
8. Cooling Fan & Ventilation
The built-in cooling fan supports stable operation under load. Keep the fan and ventilation openings unobstructed and allow at least 3 inches of clearance around the inverter during use.
Compatibility
| Compatibility | Typical Equipment | Compatibility Details |
|---|---|---|
| 12V Vehicle Power | Cars, SUVs, trucks, vans, and compatible 12V vehicle electrical systems | The TANK400 operates from an 11–15V DC input and can connect through a compatible vehicle cigarette-lighter socket or directly to a 12V battery. |
| Cigarette-Lighter Use | Compatible lower-power electronics and charging devices | When using the vehicle cigarette-lighter connection, keep the combined connected load at or below 150W. |
| Direct Battery Connection | Compatible electronics requiring more than 150W | For loads above 150W, use the supplied positive and negative battery clamps to support stable operation and avoid overloading the vehicle accessory socket. |
| Laptops & Chargers | Compatible laptop adapters and AC chargers | Suitable for compatible chargers within the applicable power limit. Verify modified sine wave compatibility before use. |
| Phones & Tablets | Smartphones, tablets, and compatible portable electronics | Use the USB-A or USB-C connections for compatible 5V USB-powered devices. Total USB output current is rated at 3.1A shared. |
| Camera Equipment | Camera battery chargers, action cameras, and compatible charging accessories | Suitable for many low-power photography and travel-charging applications through the AC or USB outputs. |
| Small AC Electronics | Small plug-in electronics, chargers, and compatible portable devices | The two 120V AC outlets provide modified sine wave output. Verify device voltage, wattage, startup surge, and waveform requirements before use. |
| USB-A Devices | Phones, tablets, and compatible USB-powered accessories | The two USB-A ports provide 5V DC charging for compatible USB devices. |
| USB-C Devices | Compatible phones, tablets, and portable electronics | The USB-C port provides 5V DC output for compatible USB-C devices. Check the device's charging requirements before use. |
| Multiple Devices | Laptop charger, phone, tablet, camera charger, and other compatible electronics | Multiple compatible devices may be connected at the same time as long as total power demand remains within the inverter's rated limits and the correct input method is used. |
| High-Starting-Surge Devices | Compatible devices with significant startup demand | Startup surge must remain within the TANK400's 800W peak output rating. |
| Modified Sine Wave Equipment | Compatible AC-powered equipment designed to operate with modified sine wave power | The TANK400 produces modified sine wave AC output. Verify compatibility before connecting equipment that requires pure sine wave or another specific waveform. |
| High-Power Appliances | High-wattage household or heating appliances | Use only when the device remains within the TANK400's 400W continuous / 800W peak limits and is compatible with modified sine wave output. Many high-power appliances exceed these limits. |
| Medical & Life-Support Equipment | Life-support systems and medical devices | Not intended for use. The TANK400 user guide states that the product is not tested, designed, or intended for life-support systems or other medical devices. |
Important Compatibility Note: The ERAYAK TANK400 provides up to 400W continuous power / 800W peak power from a compatible 11–15V DC source. When using the cigarette-lighter connection, keep the connected load at or below 150W. For loads above 150W, use the supplied battery clamps. The TANK400 produces modified sine wave AC output, so always verify device wattage, startup surge, voltage, and waveform requirements before use.
Maintenance Guide
Simple Care. Reliable Power.
Keeping your ERAYAK TANK400 in good operating condition is straightforward. Routine maintenance mainly involves checking the 12V power connections, monitoring connected load and temperature, keeping the cooling fan and ventilation openings clear, and inspecting the fuses, terminals, and cables when needed.
| Maintenance Item | When to Check | What to Do |
|---|---|---|
| 12V Power Connections | Before each use | Check the cigarette-lighter cable, battery clamps, threaded terminals, and ring connectors for secure connection, wear, or damage. |
| Connected Load | Before and during use | Keep total continuous demand within 400W and peak demand within 800W. Use the correct input method for the connected load. |
| Cigarette-Lighter Connection | Before use | Keep connected load at or below 150W when using the vehicle cigarette-lighter connection. |
| Cooling Fan & Ventilation | During use | Keep the cooling fan and ventilation openings unobstructed and maintain at least 3 inches of clearance around the inverter. |
| Fuses | If power is lost or a protection issue occurs | Disconnect the inverter before inspecting or replacing user-replaceable fuses. |
| Battery Connections | Before direct-battery use | Check that the positive and negative battery clamps are firmly connected to the correct battery terminals. |
| Physical Condition | Before use | Inspect the housing, cables, terminals, clamps, and cooling fan for visible damage. |
| Exterior Cleaning | As needed | Disconnect the inverter from all power sources before cleaning and use a soft, dry cloth. |
| Storage | When not in use | Store the inverter in a dry area away from direct sunlight, excessive heat, moisture, and conductive contaminants. |
Service Note: The TANK400 does not require engine-style scheduled maintenance. Regular inspection of the power connections, battery clamps, threaded terminals, fuses, cooling system, connected load, and physical condition is the primary maintenance requirement.
1. Power Connections — Check Before Use
Inspect the cigarette-lighter cable, battery-clamp cable, threaded positive (+) and negative (-) terminals, and ring connectors before use.
Make sure all connections are secure before turning on the inverter. When using battery clamps, always connect positive (+) to positive and negative (-) to negative.
2. Input Method — Match the Connection to the Load
When using the vehicle cigarette-lighter connection, keep the connected load at or below 150W.
For power requirements above 150W, use the supplied positive and negative battery clamps to support stable operation and avoid overloading the vehicle accessory socket.
3. Fuse Protection — Inspect When Needed
The TANK400 includes user-replaceable fuses. Always disconnect the inverter from the vehicle or battery before inspecting or replacing a fuse.
Use only the correct fuse type and rating specified for the inverter or connected power cable.
4. Load Management — Stay Within Rated Power
The TANK400 provides 400W continuous power and up to 800W peak power.
If an overload or short-circuit shutdown occurs, disconnect connected devices and confirm that the combined continuous load is within 400W and startup demand remains within the inverter's peak capacity.
5. Cooling & Ventilation — Keep Airflow Clear
Keep the cooling fan and ventilation openings unobstructed during operation. Do not install or operate the inverter in a zero-clearance compartment.
Allow at least 3 inches of open space around the TANK400 during use for proper ventilation.
If an over-temperature shutdown occurs, disconnect connected devices and allow the inverter to cool for approximately 10 minutes. Make sure nothing is blocking the cooling fan and that air can circulate freely before restarting.
6. Battery Care — Use Safe Connection Practices
When connecting the TANK400 directly to a lead-acid battery, follow the battery manufacturer's safety instructions and verify correct polarity before use.
- Wear appropriate eye protection and gloves when working around batteries.
- Keep sparks, cigarettes, and open flames away from the battery.
- Do not drop metal tools or other conductive objects onto the battery or terminals.
- Keep battery connections clean, secure, and correctly polarized.
7. Cleaning & Storage — Keep It Dry
Disconnect the TANK400 from all power sources before cleaning or inspection.
- Keep the inverter away from water, snow, moisture, and damp areas.
- Use a soft, dry cloth for exterior cleaning.
- Do not cover the cooling fan or ventilation openings.
- Store the inverter away from direct sunlight, excessive heat, moisture, and conductive contaminants.
- Keep the unit away from flammable fumes and gases.
Important Reminder: Use the TANK400 with a compatible 11–15V DC source, keep cigarette-lighter loads at or below 150W, use the supplied battery clamps for higher-power loads, keep continuous output within 400W and peak demand within 800W, maintain at least 3 inches of ventilation clearance, and always observe correct battery polarity.
Description
ERAYAK TANK-400
Portable AC Power for the Road 400W Continuous · 800W Peak
Convert 12V DC vehicle power into 120V AC output, with dual AC outlets, two USB-A ports and one 18W USB-C port in a compact 1.2 lb design.
400WContinuous output
800WPeak power
12V DCVehicle input
120V ACOutput voltage
1.2 lbPortable weight
Flexible Output
AC Power and USB Charging in One Unit
Connect compatible AC and USB devices while keeping the total running load and startup demand within the inverter’s ratings.
Five Ways to Connect
Use the dual AC outlets for compatible 120V equipment and the USB ports for direct charging.
2× ACUS-standard 120V AC outlets
2× USB-A5V output, 3.1A maximum shared total
18W USB-COne fast-charge port for compatible devices
400W / 800WContinuous and peak output ratings
Mobile Device Power
Supports compatible laptops, tablets, phones and other equipment when their actual power demand stays within the inverter and vehicle limits.
Power Within Reach
Compact enough for a glove box, backpack or center console so AC and USB power can travel with you.
Backup for Compatible Gear
Useful for charging and powering compatible equipment during road trips, mobile work and temporary power interruptions.
Protection & Cooling
Replaceable Fuses and Temperature-Aware Cooling
The fuse inventory protects both sides of the power connection, while the smart fan adjusts according to temperature to manage heat and noise.
2×25A Installed FusesUser-replaceable inverter fuses installed in the unit.
2×25A Spare FusesMatching replacement fuses included in the package.
2×20A Plug FusesIncluded for the 12V adapter fuse system.
2×10A Plug FusesAdditional included 12V adapter fuse option.
Smart Cooling FanAdjusts fan speed according to operating temperature.
Automatic ProtectionIncludes overload, overheat, voltage and short-circuit response.
Lightweight Design
Listed weight is 1.2 lb, equivalent to 545 g.
Compact Length
Overall dimensions are 7.3 × 4.2 × 1.1 inches.
Cooling That Responds
Fan speed adjusts with temperature to balance cooling and operating noise.
Specifications & Package
TANK-400 Product Details
Core product specifications and included items for installation, replacement and everyday use.
What’s in the Box
- 1× ERAYAK TANK-400 car power inverter
- 2×25A installed fuses
- 2×25A spare fuses
- 2×20A fuses for the 12V adapter
- 2×10A fuses for the 12V adapter
- 1× user manual
Before Connecting Equipment
- Check the device’s running wattage.
- Confirm startup or heating-element demand.
- Keep continuous demand within 400W.
- Confirm the vehicle outlet and fuse are rated for the required load.
- Use only the specified replacement fuse type and rating.
| Model | ERAYAK TANK-400 car power inverter |
|---|---|
| Input | 12V DC |
| Output | 120V AC |
| Power | 400W continuous / 800W peak |
| AC Outlets | 2× US-standard outlets |
| USB-A | 2× ports, 5V / 3.1A maximum total |
| USB-C | 1× 18W fast-charge port |
| Cooling | Auto-regulating smart fan |
| Dimensions | 7.3 × 4.2 × 1.1 inches |
| Weight | 1.2 lb / 545 g |
| Protection | Overheat, short-circuit, low-voltage, overvoltage, overload and temperature-based automatic shutoff |
| Warranty | 3 years |
Vehicle Power & Load Safety
A vehicle’s 12V accessory outlet and fuse may be rated below the inverter’s maximum output. The vehicle limit remains the controlling limit.
- Check the vehicle manual and 12V outlet fuse rating before connecting high-wattage equipment.
- Do not assume every vehicle accessory outlet can supply the full 400W continuous output.
- Keep ventilation openings clear and use the inverter in a dry, well-ventilated location.
- Check both running wattage and startup demand before connecting a tool, compressor or heated appliance.
- Disconnect the inverter before replacing a fuse, and use only the specified fuse rating.
- Do not rely on the inverter as the sole power source for medical-critical equipment.
Buyer Questions
TANK-400 FAQ
Important checks before using the inverter with a vehicle outlet or connected device.
Can every vehicle 12V outlet deliver 400W?
No. Vehicle accessory outlets and their fuses have model-specific current limits. Check the vehicle manual and outlet rating; use the lower of the vehicle limit and inverter rating.
What is the difference between 400W and 800W?
400W is the stated continuous output rating. 800W is the stated peak rating for short-duration startup demand. Connected equipment must remain within both limits.
Can it power a heated blanket, curling iron or power tool?
Only if the device’s actual running wattage and startup demand fit both the inverter and vehicle outlet limits. Heated appliances and tools vary widely, so check the product label before use.
How much USB charging is available?
The two USB-A ports provide up to 3.1A maximum total. The separate USB-C port is rated at 18W for compatible devices.
How does the smart fan work?
The fan automatically adjusts its speed according to operating temperature, helping manage heat while reducing unnecessary fan noise.
Which replacement fuses are included?
The package lists two spare 25A inverter fuses, plus two 20A and two 10A fuses for the 12V adapter. Two 25A fuses are installed in the inverter.
Three-Year Warranty Support
The TANK-400 is listed with a 3-year warranty. Coverage remains subject to the applicable warranty terms, product condition and purchase channel.
3 Year Warranty
Warranty
| Warranty & Support | Coverage Details |
|---|---|
| Warranty Duration | 1-Year Limited Warranty for eligible ERAYAK TANK400 purchases, subject to applicable warranty terms, proof of purchase, product condition, and technical verification. |
| Warranty Coverage | Coverage applies to eligible manufacturing defects and product malfunctions that occur under normal use during the applicable warranty period. |
| Technical Diagnosis | ERAYAK Technical Support may assist with troubleshooting issues such as no power output, low-voltage shutdown, over-voltage shutdown, overload or short-circuit shutdown, over-temperature shutdown, fuse issues, cooling problems, and 12V input connection problems before confirming the appropriate warranty solution. |
| Replacement Parts Support | For eligible warranty issues, ERAYAK may provide applicable replacement parts, troubleshooting assistance, or other appropriate service solutions after technical verification and warranty review. |
| Fuse Support | The TANK400 uses user-replaceable fuses. ERAYAK Support can assist with fuse identification, replacement guidance, and troubleshooting when a fuse-related issue occurs. |
| 12V Connection Support | Support is available for the cigarette-lighter cable, battery-clamp connection, threaded positive and negative terminals, and related 12V power-input troubleshooting. |
| Technical Support | ERAYAK provides assistance with product setup, 11–15V DC compatibility, cigarette-lighter and battery-clamp connections, load planning, modified sine wave compatibility, fault diagnosis, fuse questions, and operating guidance for the TANK400. |
| Email Support | support@erayakpower.com Customers may submit proof of purchase, order information, photos, videos, product details, and a description of the issue for technical review. |
| English Phone Support | +1 (573) 455-4565 English-speaking support is available for setup, troubleshooting, warranty questions, replacement-part assistance, and after-sales service. |
| WhatsApp Support | +1 (573) 455-4565 Contact ERAYAK via WhatsApp for convenient technical and after-sales assistance. |
| Warranty Claim Process | Contact ERAYAK Support with your proof of purchase, product model, order information, and a description of the issue. Photos, videos, connected-device information, battery details, connection method, or troubleshooting results may be requested before the appropriate warranty solution is confirmed. |
| Proper Use Requirement | Warranty service is subject to proper operation with a compatible 11–15V DC power source, correct polarity, adequate ventilation, appropriate connected loads, and operation within the TANK400's 400W continuous / 800W peak output limits. |
| Cigarette-Lighter Use Requirement | When using the vehicle cigarette-lighter connection, keep the connected load at or below 150W. For loads above 150W, use the supplied battery clamps as instructed in the TANK400 user guide. |
| Service & Repair | Do not perform unauthorized internal repairs or modifications. If the inverter, cables, terminals, clamps, cooling fan, or housing show serious damage, discontinue use and contact ERAYAK Support or qualified service personnel. |
Warranty Note: Warranty service is subject to the applicable ERAYAK warranty terms, proof of purchase, proper operation and maintenance, technical verification, and applicable exclusions. Misuse, incorrect polarity, incompatible input voltage, excessive load, improper cigarette-lighter use, blocked ventilation, moisture exposure, unauthorized modification or repair, physical damage, or other operation outside the TANK400 user guide may affect warranty eligibility.
Shipping Policy
| U.S. Shipping | Details |
|---|---|
| U.S. Warehouses | ERAYAK provides local U.S. fulfillment from warehouses in California, New Jersey, and Georgia. |
| Order Processing | Most orders are confirmed and prepared for shipment within 24 hours after order verification. |
| Tracking Number | A tracking number is provided after the order is shipped so customers can follow the delivery status online. |
| Standard Delivery | Most standard orders are estimated to arrive within 2–4 business days after shipment. |
| Expedited Processing | Expedited service is available for eligible orders. Expedited orders receive priority order confirmation, faster warehouse processing, and priority logistics handling. |
| 2-Business-Day Delivery Option | A 2-business-day delivery option may be available for eligible products and destinations. Availability and any additional shipping charges should be confirmed before ordering. |
| Shipping Coverage | Delivery is available across most locations within the contiguous United States. |
| Hawaii & Offshore Areas | For Hawaii, U.S. islands, offshore territories, or other locations outside the contiguous United States, please contact ERAYAK Support before placing your order to confirm shipping availability and cost. |
| Warehouse Assignment | Orders are fulfilled from the most suitable U.S. warehouse based on product availability and the customer's delivery location. |
| Shipping Support | Email: support@erayakpower.com Phone: +1 (573) 455-4565 WhatsApp: +1 (573) 455-4565 |
Shipping Note: Delivery times are estimates and may vary based on inventory availability, destination, carrier conditions, weather, holidays, and other logistics factors. For urgent, remote-area, or special delivery requests, contact ERAYAK Support before placing your order.
Specifications
| Specification | Details |
|---|---|
| Series Name | ERAYAK TANK400 |
| Product Type | 400W Car Power Inverter |
| Power Capacity | 400W Continuous, 800W Peak |
| DC Input Voltage | 11–15V DC |
| Compatible Power Source | Compatible 12V Vehicle DC System or 12V Battery |
| AC Output Voltage | 120V ±10V AC |
| AC Output Frequency | 60Hz |
| AC Output Waveform | Modified Sine Wave |
| AC Outlets | 2 × 120V AC Outlets |
| USB Ports | 2 × USB-A + 1 × USB-C |
| USB Output Voltage | 5V DC |
| USB Output Current | 3.1A Shared |
| Vehicle Input Option | 12V Cigarette-Lighter Cable |
| Battery Input Option | Positive (+) / Negative (-) Battery Clamps |
| Threaded Input Terminals | Positive (+) / Negative (-) Threaded Terminal Connectors with Covers |
| Cigarette-Lighter Load Limit | Keep Connected Load at or Below 150W When Using the Vehicle Cigarette-Lighter Connection |
| Higher-Power Connection | Use the Supplied Battery Clamps for Loads Above 150W |
| Short-Circuit Protection | Yes |
| Low-Voltage Protection | Yes |
| Over-Voltage Protection | Yes |
| Over-Temperature Protection | Yes |
| Overload Protection | Yes |
| Leakage Protection | Yes |
| Cooling Method | Built-In Cooling Fan |
| Maximum Continuous Load | 400W |
| Maximum Peak Output | 800W |
| Ventilation Clearance | Minimum 3 Inches Around the Inverter During Use |
| Replaceable Fuses | User-Replaceable |
| Included Fuses | 2 × 10A Fuses + 2 × 20A Fuses |
| Dimensions | 7.3 × 4.2 × 1.1 in / 18.5 × 10.6 × 6.0 cm |
| Weight | 1.2 lb / 0.52 kg |
| Included Power Accessories | 12V Cigarette-Lighter Cable + Positive / Negative Battery Clamp Cable |
Performance Note: Actual operation depends on connected load, startup surge, battery condition, input voltage, ambient conditions, ventilation, and connection method. When using the cigarette-lighter connection, keep the load at or below 150W. For loads above 150W, use the supplied battery clamps. Always verify device wattage and modified sine wave compatibility before use.
Power Efficiency
1. Practical 400W Power
The TANK400 provides up to 400W of continuous AC power and 800W peak output for compatible electronics used in vehicle and 12V battery-powered applications.
2. Two Power-Input Options
Use the cigarette-lighter connection for lower-power vehicle applications or connect directly to a compatible 12V battery with the supplied clamps when higher power is required.
3. Battery-Conscious Operation
Low-voltage protection automatically shuts down the inverter when input voltage falls below a safe level, helping protect the connected battery from excessive discharge.
4. Smart Load Management
When using the vehicle cigarette-lighter connection, keep the connected load at or below 150W. For loads above 150W, switch to the supplied battery clamps for more appropriate power delivery.
5. AC + USB Power in One Unit
Two 120V AC outlets, two USB-A ports, and one USB-C port provide multiple connection options for compatible electronics from one compact 12V power solution.
Built for Reliability
1. Short-Circuit Protection
Automatically shuts down the TANK400 when a short circuit is detected, helping protect both the inverter and connected devices.
2. Low-Voltage Protection
Helps protect the connected battery from excessive discharge by shutting down the inverter when input voltage falls below a safe operating level.
3. Over-Voltage Protection
Automatically shuts down the inverter when input voltage exceeds a safe level, helping protect the inverter and connected equipment.
4. Over-Temperature Protection
Monitors inverter temperature and automatically shuts the unit down if it becomes too hot, helping protect internal components.
5. Overload Protection
Automatically shuts down the inverter when connected power demand exceeds its rated capacity.
6. Leakage Protection
Detects unintended electrical current leakage and automatically shuts down the inverter to help reduce electrical hazards caused by insulation failure or other faults.
7. User-Replaceable Fuse Protection
User-replaceable fuses provide an additional serviceable protection component for everyday vehicle and battery-powered use.
8. Cooling Fan & Ventilation
The built-in cooling fan supports stable operation under load. Keep the fan and ventilation openings unobstructed and allow at least 3 inches of clearance around the inverter during use.
Compatibility
| Compatibility | Typical Equipment | Compatibility Details |
|---|---|---|
| 12V Vehicle Power | Cars, SUVs, trucks, vans, and compatible 12V vehicle electrical systems | The TANK400 operates from an 11–15V DC input and can connect through a compatible vehicle cigarette-lighter socket or directly to a 12V battery. |
| Cigarette-Lighter Use | Compatible lower-power electronics and charging devices | When using the vehicle cigarette-lighter connection, keep the combined connected load at or below 150W. |
| Direct Battery Connection | Compatible electronics requiring more than 150W | For loads above 150W, use the supplied positive and negative battery clamps to support stable operation and avoid overloading the vehicle accessory socket. |
| Laptops & Chargers | Compatible laptop adapters and AC chargers | Suitable for compatible chargers within the applicable power limit. Verify modified sine wave compatibility before use. |
| Phones & Tablets | Smartphones, tablets, and compatible portable electronics | Use the USB-A or USB-C connections for compatible 5V USB-powered devices. Total USB output current is rated at 3.1A shared. |
| Camera Equipment | Camera battery chargers, action cameras, and compatible charging accessories | Suitable for many low-power photography and travel-charging applications through the AC or USB outputs. |
| Small AC Electronics | Small plug-in electronics, chargers, and compatible portable devices | The two 120V AC outlets provide modified sine wave output. Verify device voltage, wattage, startup surge, and waveform requirements before use. |
| USB-A Devices | Phones, tablets, and compatible USB-powered accessories | The two USB-A ports provide 5V DC charging for compatible USB devices. |
| USB-C Devices | Compatible phones, tablets, and portable electronics | The USB-C port provides 5V DC output for compatible USB-C devices. Check the device's charging requirements before use. |
| Multiple Devices | Laptop charger, phone, tablet, camera charger, and other compatible electronics | Multiple compatible devices may be connected at the same time as long as total power demand remains within the inverter's rated limits and the correct input method is used. |
| High-Starting-Surge Devices | Compatible devices with significant startup demand | Startup surge must remain within the TANK400's 800W peak output rating. |
| Modified Sine Wave Equipment | Compatible AC-powered equipment designed to operate with modified sine wave power | The TANK400 produces modified sine wave AC output. Verify compatibility before connecting equipment that requires pure sine wave or another specific waveform. |
| High-Power Appliances | High-wattage household or heating appliances | Use only when the device remains within the TANK400's 400W continuous / 800W peak limits and is compatible with modified sine wave output. Many high-power appliances exceed these limits. |
| Medical & Life-Support Equipment | Life-support systems and medical devices | Not intended for use. The TANK400 user guide states that the product is not tested, designed, or intended for life-support systems or other medical devices. |
Important Compatibility Note: The ERAYAK TANK400 provides up to 400W continuous power / 800W peak power from a compatible 11–15V DC source. When using the cigarette-lighter connection, keep the connected load at or below 150W. For loads above 150W, use the supplied battery clamps. The TANK400 produces modified sine wave AC output, so always verify device wattage, startup surge, voltage, and waveform requirements before use.
Maintenance Guide
Simple Care. Reliable Power.
Keeping your ERAYAK TANK400 in good operating condition is straightforward. Routine maintenance mainly involves checking the 12V power connections, monitoring connected load and temperature, keeping the cooling fan and ventilation openings clear, and inspecting the fuses, terminals, and cables when needed.
| Maintenance Item | When to Check | What to Do |
|---|---|---|
| 12V Power Connections | Before each use | Check the cigarette-lighter cable, battery clamps, threaded terminals, and ring connectors for secure connection, wear, or damage. |
| Connected Load | Before and during use | Keep total continuous demand within 400W and peak demand within 800W. Use the correct input method for the connected load. |
| Cigarette-Lighter Connection | Before use | Keep connected load at or below 150W when using the vehicle cigarette-lighter connection. |
| Cooling Fan & Ventilation | During use | Keep the cooling fan and ventilation openings unobstructed and maintain at least 3 inches of clearance around the inverter. |
| Fuses | If power is lost or a protection issue occurs | Disconnect the inverter before inspecting or replacing user-replaceable fuses. |
| Battery Connections | Before direct-battery use | Check that the positive and negative battery clamps are firmly connected to the correct battery terminals. |
| Physical Condition | Before use | Inspect the housing, cables, terminals, clamps, and cooling fan for visible damage. |
| Exterior Cleaning | As needed | Disconnect the inverter from all power sources before cleaning and use a soft, dry cloth. |
| Storage | When not in use | Store the inverter in a dry area away from direct sunlight, excessive heat, moisture, and conductive contaminants. |
Service Note: The TANK400 does not require engine-style scheduled maintenance. Regular inspection of the power connections, battery clamps, threaded terminals, fuses, cooling system, connected load, and physical condition is the primary maintenance requirement.
1. Power Connections — Check Before Use
Inspect the cigarette-lighter cable, battery-clamp cable, threaded positive (+) and negative (-) terminals, and ring connectors before use.
Make sure all connections are secure before turning on the inverter. When using battery clamps, always connect positive (+) to positive and negative (-) to negative.
2. Input Method — Match the Connection to the Load
When using the vehicle cigarette-lighter connection, keep the connected load at or below 150W.
For power requirements above 150W, use the supplied positive and negative battery clamps to support stable operation and avoid overloading the vehicle accessory socket.
3. Fuse Protection — Inspect When Needed
The TANK400 includes user-replaceable fuses. Always disconnect the inverter from the vehicle or battery before inspecting or replacing a fuse.
Use only the correct fuse type and rating specified for the inverter or connected power cable.
4. Load Management — Stay Within Rated Power
The TANK400 provides 400W continuous power and up to 800W peak power.
If an overload or short-circuit shutdown occurs, disconnect connected devices and confirm that the combined continuous load is within 400W and startup demand remains within the inverter's peak capacity.
5. Cooling & Ventilation — Keep Airflow Clear
Keep the cooling fan and ventilation openings unobstructed during operation. Do not install or operate the inverter in a zero-clearance compartment.
Allow at least 3 inches of open space around the TANK400 during use for proper ventilation.
If an over-temperature shutdown occurs, disconnect connected devices and allow the inverter to cool for approximately 10 minutes. Make sure nothing is blocking the cooling fan and that air can circulate freely before restarting.
6. Battery Care — Use Safe Connection Practices
When connecting the TANK400 directly to a lead-acid battery, follow the battery manufacturer's safety instructions and verify correct polarity before use.
- Wear appropriate eye protection and gloves when working around batteries.
- Keep sparks, cigarettes, and open flames away from the battery.
- Do not drop metal tools or other conductive objects onto the battery or terminals.
- Keep battery connections clean, secure, and correctly polarized.
7. Cleaning & Storage — Keep It Dry
Disconnect the TANK400 from all power sources before cleaning or inspection.
- Keep the inverter away from water, snow, moisture, and damp areas.
- Use a soft, dry cloth for exterior cleaning.
- Do not cover the cooling fan or ventilation openings.
- Store the inverter away from direct sunlight, excessive heat, moisture, and conductive contaminants.
- Keep the unit away from flammable fumes and gases.
Important Reminder: Use the TANK400 with a compatible 11–15V DC source, keep cigarette-lighter loads at or below 150W, use the supplied battery clamps for higher-power loads, keep continuous output within 400W and peak demand within 800W, maintain at least 3 inches of ventilation clearance, and always observe correct battery polarity.
Frequently asked questions
-
What devices can I power with the ERAYAK TANK400 Power Inverter?
The TANK400 is designed for compatible low-power electronics such as laptop chargers, phones, tablets, camera chargers, and other small AC or USB-powered devices. It provides up to 400W continuous power and 800W peak power, but always check the connected device’s wattage, startup surge, and waveform requirements before use.
-
How much power does the ERAYAK TANK400 supply?
The TANK400 provides up to 400W of continuous AC power and 800W of peak output for brief startup demand.
-
Can I power the TANK400 from my car’s cigarette-lighter socket?
Yes. The TANK400 includes a 12V cigarette-lighter cable for compatible vehicle use. When using the cigarette-lighter connection, keep the connected load at or below 150W.
-
When should I use the battery clamps instead of the cigarette-lighter plug?
Use the supplied battery clamps when your connected load is above 150W. The manual recommends direct battery connection for higher-power applications to support stable operation and avoid overloading the vehicle accessory socket.
-
Can I use multiple devices at the same time with the TANK400?
Yes. You can use the two 120V AC outlets, two USB-A ports, and USB-C port at the same time, as long as the total connected load remains within the inverter’s rated capacity and you use the appropriate input connection.
-
What protection features does the TANK400 have?
The TANK400 includes short-circuit, low-voltage, over-voltage, over-temperature, overload, and leakage protection. These protections can shut down the inverter when abnormal operating conditions are detected.
-
What should I do if the TANK400 overheats or shuts down?
Disconnect the connected devices and allow the inverter to cool for about 10 minutes. Make sure the cooling fan is not blocked and that air can circulate freely around the inverter before restarting it.
-
How much ventilation space does the TANK400 need?
Allow at least 3 inches of open space around the inverter during operation. Do not cover the cooling fan or ventilation openings, and do not operate the unit in a zero-clearance compartment.
-
Can I use the TANK400 with medical or life-support equipment?
No. The TANK400 user guide states that the product is not tested, designed, or intended for use with life-support systems or other medical devices.
This 400W power inverter converts 12V DC to 110V AC and features USB-C charging. Customers praised it as a "must have" for car travel, camping, and emergencies. Shoppers successfully powered laptops, phones, tablets, small TVs, fans, and nebulizers. The compact design, battery clamps, and safety features were highlighted. Great value for money.
- A must have in any car! Game changer!
- Works great! Great value for the money!
- Great, reliable companion for any adventure.
Value (positive)Camping (positive)Charging (positive)Phone (positive)Charger (positive)
D
Works great! I don’t have an outlet in the back of my truck to charge anything and this works great! Just plug it in to the 12v outlet and you have instant 110 outlets! Great value for the money! Nice find! Not huge! Comes with battery clamps as well! Nice design!
S
Works great for powering small items such as lights, laptops, small fans, TVs, phones, and anything that requires less than 400 watts.
M
This inverter is a must have for frequent car travelers. We use it to charge our laptops while on road trips. It works great!
T
This was a must have in any car! For Charging phones, laptops, tablets & even nebulizer machine. Emergencies yes. Even good for electric small coolers. Being stuck in traffic with no electricity etc. Game changer! Oh and great gift if needed!
D
This is a extremly useful product and great to charge laptop in the car.
A
I recently tried this power inverter on a camping trip, and I’m honestly impressed by how handy it turned out to be. It effortlessly powered my laptop and charged my phone with the USB-C fast charger, which was a lifesaver when I needed to work and keep my devices running. The two AC outlets were perfect for running small appliances, and the dual USB ports allowed me to charge multiple devices at once. The compact design made it easy to pack, and I loved the peace of mind the built-in safety features provided. Whether you're on a road trip, camping, or just need backup power in an emergency, this inverter is a great, reliable companion for any adventure.