We read FOSSiBOT's listing for the F2400 on 9 October 2026 and checked its capacity, charging and runtime claims with arithmetic. We have not run this power station.
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Research-based score out of 10. The overall score is the average of the four parts below.
- About $0.31 per watt-hour
- LFP cells rated for 4,000+ cycles
- Adjustable AC charge rate, 300 to 1,100 W
- Works as a UPS with under 8 ms switchover
- 48.5 lb
- Cannot be expanded
- Solar input capped at 500 W
- Warranty shown as 5 years and as "2+3 years"
The short answer
Consider it if
- You want backup power for a fridge, router and lights during an outage.
- You camp from a vehicle and weight is not a concern.
- You want the most watt-hours per dollar.
Skip it if
- You need to carry it any distance. It weighs as much as a bag of cement.
- You want to add batteries later. The F2400 is a single fixed unit.
- You charge outdoors in freezing weather. Charging is limited to above 32 F.
The price that matters
The F2400 sells for $629 against a list price of $1,499. A 58% discount that never seems to end is a marketing device. Compare on price per watt-hour.
$629 divided by 2,048 Wh is about $0.31 per watt-hour. LFP power stations from the best-known brands commonly land between $0.40 and $0.70. On that measure the F2400 is good value at its selling price, and would be poor value at $1,499 ($0.73).
Do the charging and runtime claims add up?
| Claim | Our arithmetic | Result |
|---|---|---|
| 0 to 100% in 2 h at 1,100 W | 2,048 Wh / 1,100 W = 1.9 h before losses | Plausible |
| Solar in about 4 h at 500 W | 2,048 / 500 = 4.1 h in perfect sun | Best case |
| AC plus solar in about 1.5 h | 2,048 / 1,600 = 1.3 h | Plausible |
| 60 W device for about 29 h | 2,048 x 0.85 / 60 = 29 h | Matches |
FOSSiBOT publishes its own runtime formula with an 85% efficiency factor, which is honest practice. Usable energy is about 1,740 Wh. A fridge averaging 60 W runs for a bit over a day. A 1,500 W space heater empties it in about 70 minutes.
Real solar panels rarely deliver their rated power. Expect six hours or more from 500 W of panels on a good day.
Two things to confirm
Warranty. The banner says a five-year warranty. The spec table says "2+3 Years" and does not explain the split. That usually means two years as standard and three more after registering the product. Ask which, and register promptly.
Temperature. The page gives the low discharge limit as minus 15 C and converts it to minus 4 F. Minus 15 C is 5 F. Trust the Celsius figure. Charging is limited to 0 to 40 C, so do not expect to recharge it in a freezing garage.
The page lists "UL Standard" among its certifications without naming a standard number. It also says plainly that the unit is not IP68, which we appreciate. Keep it dry.
Key facts
As published by FOSSiBOT or the sources named above, checked on 9 Oct 2026. Prices and terms change, so confirm them before you buy.
| Capacity | 2,048 Wh |
|---|---|
| Battery | LiFePO4 (EVE cells), 4,000+ cycles to 80% |
| AC output | 2,400 W continuous, 4,800 W surge, 6 outlets |
| AC charging | 300 to 1,100 W adjustable; 2 h at full rate |
| Solar input | Up to 500 W, 11.5 to 50 V, MC4 |
| USB-C | 1 x 100 W, 3 x 20 W |
| USB-A | 2 x 18 W |
| DC | 12 V / 25 A RV port, 12 V / 10 A car port, 2 x 12 V / 3 A |
| UPS switchover | Under 8 ms |
| Expandable | No |
| Weight | 48.5 lb (22 kg) |
| Size | 15.2 x 11.2 x 12.6 in |
| Charging temperature | 0 to 40 C (32 to 104 F) |
| Warranty | 5 years (banner); "2+3 years" (spec table) |
| Returns | 30 days |
FAQ
How long will the FOSSiBOT F2400 run a fridge?
Using FOSSiBOT's own 85% formula, a fridge averaging 60 W runs for about 29 hours.
Can you add an extra battery?
No. FOSSiBOT's FAQ says the F2400 is a single unit and cannot be expanded.
How long does it take to charge?
About 2 hours from a wall outlet at 1,100 W. Solar charging at the 500 W limit takes 4 hours in ideal sun, and longer in practice.
Did you test it?
No. This review is based on FOSSiBOT's published specifications and our own arithmetic.
Verdict
At $629 the F2400 offers a lot of LFP capacity for the money, and its performance claims are consistent with each other. Ignore the $1,499 sticker, get the warranty terms in writing, and remember that 48.5 lb is a two-hand carry.
Product names and trademarks belong to their owners. This review is general information, not professional advice.