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A solar generator for home backup needs enough capacity to run essential appliances and enough output to start them. Look at the watt-hour rating, continuous and surge power, and whether the unit can expand with extra batteries. For whole-home backup, dual-voltage 120V/240V output and a fast automatic transfer switch become important.
The models below come from A-iPower and OUPES, two makers that offer portable power stations with lithium iron phosphate batteries. They range from small units that can keep a refrigerator running for a few hours to large systems that can back up a central air conditioner. All can be recharged from solar panels, though the maximum solar input varies.
Every specification on this page comes from the manufacturer’s own product page, checked on 29 October 2026. We have not used these products ourselves, so the picks are based on published specifications only.
For a broader look at portable power stations, see Best Portable Power Stations for Home Backup and learn How Much Home Battery Capacity You Need.
How we chose these
- Capacity and expandability: How many watt-hours the unit stores and whether you can add extra batteries to increase runtime.
- Output power and surge: The continuous and peak wattage available to start and run appliances like refrigerators, pumps, or air conditioners.
- Solar charging speed: The maximum solar input in watts, which determines how quickly the generator recharges from panels.
- UPS/EPS backup: Whether the unit can automatically switch over to battery power during an outage, and how fast that switch happens.
All models in this comparison use lithium iron phosphate (LiFePO4) batteries, which OUPES and A-iPower say provide thousands of cycles and retain 80% capacity after years of use.
Comparison table
| Product | Capacity | Output Power (W) | Battery Type | Solar Input (W) | Expandable | UPS/EPS |
|---|---|---|---|---|---|---|
| GS4800i | 2048Wh | 2400 | LiFePO4 | 500 | Not stated | Not stated |
| GS2400i | 960Wh | 1200 | LiFePO4 | Not stated | Not stated | Integrated UPS |
| Mega 1 Kit | 3072Wh | 2000 | LiFePO4 | 240 (panel included) | Up to 5.12kWh | Seamless UPS (2000W max) |
| Mega 2 Pro Kit | Not stated (expandable to 10.24kWh) | 2500 (3600 boost) | Not stated | Not stated | Up to 10.24kWh | 20ms UPS, 2500W pass-through |
| Guardian 6000 V2 Kit | 4.6kWh (expandable to 41.4kWh) | 6000 (7200 boost) / 3600 at 120V | LFP | 3600 | Up to 41.4kWh | 20ms EPS backup |
Solar input values reflect the maximum the unit can accept from panels, not necessarily the wattage of included panels. Expandable capacity shows the maximum with extra batteries.
1. A-iPower GS4800i: for high-output home backup with pure sine wave
A-iPower says the GS4800i uses a 2048Wh LiFePO4 battery and delivers pure sine wave output. It can be charged from a wall outlet at up to 1100W, and it accepts up to 500W from solar panels. The unit has AC, DC, USB, and car charging ports, and its protection system guards against over-voltage, over-current, and short circuits.
- 2048Wh LiFePO4 battery (A-iPower)
- Pure sine wave output (A-iPower)
- Fast wall charging up to 1100W (A-iPower)
Pros: High 2400W output; fast wall charging; pure sine wave for sensitive electronics
Cons: No UPS or EPS backup stated; not expandable; solar input limited to 500W
Check the A-iPower GS4800i on Amazon
2. A-iPower GS2400i: for small appliance backup during short outages
The A-iPower GS2400i provides 1200 watts of output from a 960Wh LiFePO4 battery. It includes several AC, USB, and DC outlets, plus an LED light and an integrated UPS function. According to A-iPower, the battery is rated for 3500 cycles.
- 960Wh LiFePO4 battery (A-iPower)
- 3500 battery cycle life (A-iPower)
- Integrated LED light (A-iPower)
Pros: Compact and lightweight; integrated UPS; LED light for emergencies
Cons: Lower capacity; solar input not stated; not expandable
Check the A-iPower GS2400i on Amazon
3. OUPES Mega 1 + B2 Extra Battery + 240W Solar Panel: for mid-size home backup with expandable capacity
OUPES says the Mega 1 kit includes a 3072Wh LiFePO4 battery and a 240W solar panel. It outputs 2000W continuously and can expand up to 5.12kWh with extra B2 batteries. The unit supports 2200W max input charging and offers seamless UPS backup.
- 3072Wh capacity (OUPES)
- 2200W max input charging speed (OUPES)
- Smart HD LCD display (OUPES)
Pros: High capacity; fast charging; expandable; UPS backup
Cons: Solar input limited to the included 240W panel; output capped at 2000W
Check the OUPES Mega 1 + B2 Extra Battery + 240W Solar Panel on Amazon
4. OUPES Mega 2 Pro + B2 Extra Battery + 2*240W Solar Panel: for heavy-duty appliances with high surge output
OUPES describes the Mega 2 Pro as having a 2500W base output with a 3600W boost mode. It can expand up to 10.24kWh and includes a 1000W DC Anderson port. The unit recharges in 52 minutes via AC plus solar and provides a 20ms UPS with 2500W pass-through.
- 1000W DC power via Anderson port (OUPES)
- Five fast recharging ways (OUPES)
- Smart APP control (OUPES)
Pros: High surge output; large expandability; fast recharge; UPS with pass-through
Cons: Base capacity not stated; battery chemistry not stated; heavy kit
Check the OUPES Mega 2 Pro + B2 Extra Battery + 2*240W Solar Panel on Amazon
5. OUPES Guardian 6000 V2 + 2*240W Solar Panel: for whole-home dual-voltage backup with high solar input
The OUPES Guardian 6000 V2 offers dual-voltage output: 240V at 6000W (boost 7200W) and 120V at 3600W. Its capacity starts at 4.6kWh and can expand to 41.4kWh. Solar input reaches 3600W via dual MPPT, and the unit includes a 20ms EPS backup and a smart app.
- Dual MPPT solar input (OUPES)
- Five fast charging ways including alternator (OUPES)
- Smarter App with schedule tasks (OUPES)
Pros: Dual-voltage output; very high expandability; fast solar input; EPS backup
Cons: Base capacity only 4.6kWh; large and heavy; complex setup
Check the OUPES Guardian 6000 V2 + 2*240W Solar Panel on Amazon
Which one fits you
| Your situation | Look at | Why |
|---|---|---|
| You need whole-home backup with 240V appliances | Guardian 6000 V2 Kit | Dual voltage and high output run central AC, dryers, and water pumps |
| You want a mid-size system for fridge, lights, and electronics | Mega 1 Kit or Mega 2 Pro Kit | Expandable capacity and UPS keep essentials running for hours or days |
| You need a compact unit for short outages or camping | GS2400i | Lightweight with integrated UPS and LED light |
| You need high output for tools or medical devices | GS4800i | 2400W pure sine wave handles demanding loads |
Practical tips
- Look for a unit with UPS or EPS if you need seamless switchover during an outage; the switchover time is often 20ms or less.
- Consider expandable capacity if you may need longer runtime later; some systems let you add extra batteries over time.
- Check the maximum solar input wattage to match your panel setup; a higher input means faster off-grid recharging.
- Verify the output waveform is pure sine wave if you plan to power sensitive electronics like medical equipment or variable-speed motors.
Sources
Specifications from each manufacturer’s product page, checked 29 October 2026: A-iPower GS4800i, A-iPower GS2400i, OUPES Mega 1 + B2 Extra Battery + 240W Solar Panel, OUPES Mega 2 Pro + B2 Extra Battery + 2*240W Solar Panel, OUPES Guardian 6000 V2 + 2*240W Solar Panel. Makers can change specifications; check the product page before you buy.
