FOSSiBOT F2400
#7 in LargeFull review
A low-cost 2kWh station for home backup and RV use when price per watt-hour matters more than charging speed.
Amazon $579 FOSSiBOT $609$579
4.1/5
For home-backup and RV buyers who want 2 kWh, high output and room to add batteries at a low price per watt-hour. Expect average efficiency at heavy loads.
- 2,150 WhCapacity
- 2,400 WAC output
- 54 lbWeight
- Semi-solid-state LiFePO4Battery
- $0.37Price / Wh
Check price at Amazon$799Check price at Dabbsson$799
Price checked October 20, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- About $0.37 per Wh for 2.15 kWh
- 2400W continuous output and a TT-30 RV outlet
- Expands to about 6.5 kWh with add-on batteries
- 1200W solar input
Cons
- The Solar Lab’s first full-load test shut down at 30% charge from overheating
- Tested at 82% efficiency under a 2,150W load, middling for the class
- Fans are noticeable under heavy load
How it scores
The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Independent capacity tests
Usable energy delivered from a full charge through the AC outlets, as measured by independent reviewers. Inverter losses mean no station delivers its full rated capacity.
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 82% | Continuous 2,150W load from full; an earlier run shut down at 30% from overheating. AC recharge measured at about 1 h 15 min to 80%, nearly 2 h to full. |
Specifications
| Battery | |
|---|---|
| Rated capacity | 2,150 Wh |
| Tested usable capacity | 1,763 Wh (82%) |
| Chemistry | Semi-solid-state LiFePO4 |
| Cycle life | 4,500 to 80% |
| Expandable | Yes, up to 6,450 Wh |
| Output | |
| AC output | 2,400 W (4,800 W surge) |
| Boost mode (resistive loads) | 3,600 W |
| AC outlets | 4 total |
| 120V 20A outlets (NEMA 5-20R) | 3 |
| RV 30A outlet (TT-30R) | 1 |
| AC waveform | Pure sine wave |
| USB-C ports | 3 (up to 100 W each) |
| USB-A ports | 3 |
| 12 V car outlet | Yes |
| DC5521 ports | 2 |
| UPS / pass-through | Yes (15 ms switchover) |
| Charging | |
| AC charging | 1,800 W |
| Max solar input | 1,200 W |
| Solar input voltage | 12-60V, 25A max |
| Build | |
| Weight | 54 lb (24.5 kg) |
| Dimensions | 17 x 10 x 11.9 in |
| App | Dabbsson app |
| Warranty | 5 years |
Alternatives in this size
PECRON E1500LFP
#8 in LargeFull review
A mid-priced, expandable LiFePO4 station for home backup and RV use, for buyers who want room to add batteries later.
Amazon $549 Pecron $549$549
Anker SOLIX S2000
#10 in LargeFull review
For home backup of a fridge, router and small appliances where a compact, long-lived battery matters more than high output or solar charging speed.
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