4kW 24V Off-Grid Solar Inverter | 140A MPPT | EASUN
- 4,000W Pure Sine Wave Output for Everyday Backup Loads: Delivers 4,000W of continuous 120V AC power for common essentials such as refrigerators, Wi-Fi routers, lighting, TVs, laptops, fans, small appliances and selected motor-driven loads when properly sized.
- Built for Compatible 24V LiFePO4 Battery Systems: Designed for users who already own a 24V lithium battery system and want to add AC output, solar charging and utility charging without moving immediately to a larger 48V platform.
- Up to 2× Surge Capacity for 5 Seconds: Helps handle short startup surges from selected refrigerators, fans, pumps and other motor-driven appliances. Surge capability is temporary and does not mean the inverter can continuously supply 8,000W.
- Up to 5,600W Solar Input: Supports up to 5.6kW rated PV input with a 55–350VDC MPPT operating range and 350VDC maximum PV open-circuit voltage, giving users more room to build a stronger solar array.
- 140A MPPT Solar Charging: Supports up to 140A PV charging current for properly sized compatible 24V battery systems, helping recover stored energy faster when sufficient solar power is available.
- 110A Utility Charging with Flexible Charging Options: Supports up to 110A utility charging and up to 140A maximum combined charging current, allowing the battery system to be charged from solar, utility power or a configured charging strategy.
- RS485 BMS Communication for Selected Lithium Batteries: Supports lithium battery communication through RS485 for selected compatible batteries. Compatibility depends on the exact battery model, BMS protocol, communication cable and system settings.
- 10ms UPS / 20ms Appliance Transfer: Provides fast backup switching when utility power is interrupted, helping many communications devices, office loads, lighting and compatible household appliances continue operating with minimal interruption.
- Battery-Free Operation for Staged Solar Builds: Supports compatible battery-free operation, allowing users to start with solar and add or expand battery storage later as their system grows.
- Best for Essential-Load Backup and Smaller Off-Grid Systems: A practical fit for small home backup systems, cabins, garages, workshops, remote buildings and DIY solar setups. For large whole-home loads, central air conditioning or larger split-phase systems, a higher-power 48V platform may be more suitable.
Stocked locally in U.S. warehouses. Free shipping nationwide with delivery to your door in 2–5 business days.
Enjoy hassle-free 30-day returns. Backed by an official product warranty and 24/7 dedicated technical after-sales support.
Engineered to meet UL 1741 and FCC Part 15 Class B standards. Contact us directly to receive full certification documents for local utility permitting.
Our batteries come with a 5-year warranty, which can be extended to 7 years total upon product registration. Accessories are covered by a 1-year warranty, and like-new (refurbished) batteries include a 1-year warranty.
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We offer free shipping within the continental U.S. via UPS Ground or FedEx, with orders typically processed in 1–2 business days and delivered within 2–5 business days. Large products such as 12V 628Ah, 48V 314Ah batteries, or 12kW inverters are shipped by truck (LTL) and require signature upon delivery. After order confirmation, we will contact you by email to confirm shipment, and transportation arrangements typically take about 48 hours. Please note that we do not ship to Alaska, Hawaii, Puerto Rico, or PO Box addresses. Delivery times may vary due to external factors such as carrier delays or weather conditions.
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4kW 24V Off-Grid Solar Inverter for LiFePO4 Battery Systems
Already have a 24V battery system? Add 4,000W pure sine wave AC power, up to 5,600W solar input, and 140A MPPT charging without rebuilding your entire energy setup.
Built for practical home backup, cabins, garages, workshops and compact off-grid systems.
Already Have a 24V LiFePO4 Battery? You're Halfway There.
Add solar charging, 120V AC power and backup capability without replacing your existing 24V battery system.
If you already use compatible 24V LiFePO4 batteries, this inverter turns stored DC energy into usable household AC power while also managing solar charging and utility charging.
Instead of combining multiple separate devices, you get an inverter, AC charger and MPPT solar charge controller in one compact unit.
One Inverter. Solar, Battery and Utility in One System.
Bring your main energy sources together through one compact inverter.
What Can a 4kW Inverter Power?
Power everyday essentials with 4,000W of continuous pure sine wave AC output.
With 4,000 watts of continuous output, this inverter is designed for many common household and off-grid loads.
More Solar In. Faster Battery Recovery.
Connect up to 5.6kW of solar panels and recharge a properly sized 24V battery system with up to 140A MPPT solar charging.
Will It Work with My LiFePO4 Battery?
Built for 24V lithium battery systems, with BMS communication available for selected compatible batteries.
This inverter supports lithium battery operation and includes settings designed for compatible 24V LiFePO4 battery systems.
Power the Loads That Matter — Even When the Grid Goes Down
Reliable backup is about more than continuous wattage. This 4kW inverter is built to handle everyday household loads, short startup surges, and fast power transitions when utility power is interrupted.
Use Energy Your Way
Choose how your system uses solar, battery and utility power.
Monitor Your System at a Glance
Check the key operating information you need directly from the front LCD.
The LCD helps you quickly understand what the inverter is doing without relying on guesswork.
Where This 4kW 24V Inverter Fits Best
A strong fit for compact backup and off-grid systems.
This model is designed for users who want dependable 24V backup or off-grid power without immediately moving to a larger 48V platform.
Key Technical Specifications
Review the key electrical, charging and physical specifications for the EASUN POWER 4kW 24V off-grid solar inverter.
AC Output
| Rated Output Power | 4000W |
|---|---|
| Output Waveform | Pure Sine Wave |
| Output Voltage | 120VAC ±5% |
| Output Frequency | 50Hz / 60Hz |
| Peak Efficiency | 94% |
| Surge Capacity | 2× Rated Power for 5 Seconds |
Battery
| Nominal DC Input Voltage | 24VDC |
|---|---|
| Low DC Warning Voltage | 22.0VDC |
| Low DC Cut-Off Voltage | 21.0VDC |
| High DC Recovery Voltage | 29.0VDC |
| High DC Cut-Off Voltage | 31.0VDC |
Solar Input
| Rated PV Power | 5600W |
|---|---|
| Max PV Open Circuit Voltage | 350VDC |
| PV MPPT Range | 55–350VDC |
| Max PV Charging Current | 140A |
Utility Charging
| Max Utility Charging Current | 110A |
|---|---|
| Max Combined Charging Current | 140A |
System
| Transfer Time | 10ms Typical UPS / 20ms Typical Appliances |
|---|---|
| No-Load Power Consumption | <35W |
Physical
| Dimensions | 400 × 250 × 89 mm |
|---|---|
| Net Weight | 8.5 kg |
| Operating Temperature | 0°C to 55°C |
Frequently Asked Questions
Common questions about battery compatibility, solar input, charging and backup applications.
Is this inverter compatible with 24V LiFePO4 batteries?
Yes. This model is designed for 24V battery systems and supports compatible lithium battery operation. If BMS communication is required, battery protocol compatibility must be confirmed before ordering.
How much solar can I connect?
This model supports up to 5,600W rated PV power, with a 55–350VDC MPPT operating range and 350VDC maximum PV open circuit voltage.
What is the maximum charging current?
The inverter supports up to 140A PV charging current, 110A utility charging current, and 140A maximum combined charging current. Actual battery charging current should be configured according to your battery manufacturer's specifications.
Can the inverter work without a battery?
Yes. Battery-free operation is available for compatible system configurations and can be useful when building a solar system in stages.
Can it power a refrigerator?
Yes, provided the refrigerator's running watts and startup surge remain within inverter capability.
Does it support lithium battery BMS communication?
RS485 / lithium communication is available for selected compatible batteries. Compatibility depends on battery model, protocol, communication cable and BMS support.
Is this suitable for whole-home backup?
This 4kW model is better suited to essential-load backup and smaller off-grid systems. Larger whole-home electrical loads may require a higher-power or 48V platform.
Is this a 120V inverter for US applications?
Yes. The version described on this page provides 120VAC output for compatible US applications.