Fossibot F2400
- AC delivered · est.
1,741 Wh. Show source
estimated sourcefossibot.com ↗2026-07-04- output
2,400 W. Show source
claimed sourcefossibot.com ↗- surge
4,800 W. Show source
claimed sourcefossibot.com ↗- weight
22 kg. Show source
claimed sourcefossibot.com ↗- recharge
120 min. Show source
claimed sourcefossibot.com ↗
Limited
#18 of 20
in the Large (2 kWh class) class
Lifted by Output & versatility and Durability & longevity; held back by charging & solar.
Check current availability and pricing at the retailer.
Check price on AmazonSee alternatives to the Fossibot F2400 →At a glance
Fossibot F2400 is a large (2 kwh class) model best suited to cpap traveler. It supplies 2,400 W of continuous AC output. BatteryRank scores it 47 out of 100 within its size class.
Our verdict on the Fossibot F2400
A straightforward 2 kWh unit that competes on output and sockets: 2,048 Wh, 2,400 W continuous with a healthy 4,800 W surge ceiling, and 6 AC outlets, at 22 kg. Two constraints define it. The pack is sealed, so 2,048 Wh is permanent, and solar input stops at 500 W — the lowest of any 2 kWh unit we track. This is a grid-tied backup unit that happens to accept a panel.
- You want generous surge headroom in a mid-weight 2 kWh unitA 4,800 W surge is double the 2,400 W continuous rating, comfortably ahead of rivals at this size offering 3,600 W or less.
- You are spreading load across many small devices6 AC sockets on a 2,400 W budget matches the highest outlet count in this class, and at 22 kg it stays among the lighter options.
- You expect to add storage as your needs growThe pack is sealed at 2,048 Wh across its full 3,500-cycle life, so there is no module path — expansion means an entire second unit. The AC200L holds the same 2,048 Wh but accepts add-on batteries.
- You refill between short grid windowsA 120-minute wall recharge is at the slow end for 2,048 Wh, and with only 500 W of solar there is no fast alternative path. The Elite 100 V2 refills in 70 minutes against the 120 this unit needs.
The honest limit: The 4,800 W surge and six sockets are the specifications this unit leads with, and both are genuine. What the sheet does not foreground is the 500 W solar ceiling, which is roughly a quarter of what several rivals at 2,048 Wh accept. Anyone buying it with an off-grid or emergency-solar plan in mind is buying the wrong unit for that job.
What our data can’t tell you: We hold no 12 V socket count, no noise reading, no dimensions and no split-phase status for this model. The unknown 12 V provision is the practical gap, because a sealed 2,048 Wh unit with six AC outlets is otherwise well suited to vehicle and campsite use, where DC output is what buyers actually reach for.
BatteryRank Engineering Team · Last reviewed · Method
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
2,048 Wh. Show source
claimed sourcefossibot.com ↗2026-07-04The marketing number — total cell capacity.
1,741 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 24.2 nights | 9 W · |
| CPAP (heated humidifier on) | about 3.9 nights | 56 W · |
| Refrigerator (full-size) | about 28 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 97 hours | 18 W · |
| Laptop (65W charger) | about 54 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 87 full charges | 20 W · |
Who it fits
Mechanical matches against this model's own sourced specs — never invented sentiment, never a guess on a spec we don't have.
1741 Wh AC-delivered (est.) → multiple CPAP nights per charge
2400 W inverter, 1741 Wh AC-delivered (est.) → runs a fridge through an outage
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
42% dataOwner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
62% dataLightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Battery-side usable capacity
2,048 Wh. Show source
claimed sourcefossibot.com ↗- Rated cycle life
3,500 cycles. Show source
claimed sourcefossibot.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourcefossibot.com ↗- Rated capacity
2,048 Wh. Show source
claimed sourcefossibot.com ↗- Cycle-life threshold
80 %. Show source
claimed sourcefossibot.com ↗
Energy available from the battery before output-conversion losses. AC-delivered capacity is shown separately in Capacity Truth.
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
2,400 W. Show source
claimed sourcefossibot.com ↗- Surge power output
4,800 W. Show source
claimed sourcefossibot.com ↗- AC outlets
6 outlets. Show source
claimed sourcefossibot.com ↗- USB-A ports
2 ports. Show source
claimed sourcefossibot.com ↗- USB-C ports
4 ports. Show source
claimed sourcefossibot.com ↗- USB-C max output
100 W. Show source
claimed sourcefossibot.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
Charging & solar
- AC recharge speed
1,100 W. Show source
claimed sourcefossibot.com ↗- AC charge time (0–100%)
120 min. Show source
claimed sourcefossibot.com ↗- Max solar input
500 W. Show source
claimed sourcefossibot.com ↗
How fast the unit recharges from a wall outlet — higher means shorter waits between uses.
How long a full recharge takes from a wall outlet, start to finish.
The most solar panel wattage the unit can accept — undersized panels just mean slower charging, not damage, but oversizing this is wasted money.
Reliability & durability
- UPS switchover time
10 ms. Show source
claimed sourcefossibot.com ↗
How fast the unit takes over when grid power cuts out. Under ~20ms is fast enough that most electronics — including many CPAP machines — won't even blip.
Size & portability
- Weight
22 kg. Show source
claimed sourcefossibot.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
Brand reputation: Deep-discount value brand (2048Wh/2400W often ~$899). Strong on-paper specs (6 AC, 4800W surge, 10ms UPS) but low Trustpilot (2.6/61) and thin support footprint signal post-sale risk. Cycle spec conflicts on OEM page (4000+ marketing vs 3500+ table).
What else to consider instead of the Fossibot F2400
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the Fossibot F2400 at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- DJI Power 2000score 75 · same size class
- Why you would switch
- The DJI Power 2000 carries 25% more continuous output (3,000 W vs 2,400 W), which decides what it can run at all.
- What you give up
- Nothing the sourced data can show — the Fossibot F2400 leads on no compared dimension by a margin worth acting on.
- Aferiy P280score 74 · same size class
- Why you would switch
- The Aferiy P280 carries 17% more continuous output (2,800 W vs 2,400 W), which decides what it can run at all.
- What you give up
- Nothing the sourced data can show — the Fossibot F2400 leads on no compared dimension by a margin worth acting on.
- Oupes Mega 2 Proscore 69 · same size class
- Why you would switch
- The Oupes Mega 2 Pro takes 100% more rated solar input (1,000 W vs 500 W) for off-grid recharging.
- What you give up
- Nothing the sourced data can show — the Fossibot F2400 leads on no compared dimension by a margin worth acting on.
- Anker SOLIX C2000 Gen 2score 68 · same size class
- Why you would switch
- The Anker SOLIX C2000 Gen 2 is 14% lighter (18.9 kg vs 22 kg).
- What you give up
- Nothing the sourced data can show — the Fossibot F2400 leads on no compared dimension by a margin worth acting on.
- Bluetti Elite 200 v2score 68 · same size class
- Why you would switch
- The Bluetti Elite 200 v2 delivers 19% more usable AC energy (2,074 Wh vs 1,741 Wh).
- What you give up
- Nothing the sourced data can show — the Fossibot F2400 leads on no compared dimension by a margin worth acting on.
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the Fossibot F2400 weigh?
- 22 kg (48.5 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the Fossibot F2400?
- 386 × 284 × 321 mm (15.2 × 11.2 × 12.6 in), length × width × height, manufacturer-claimed.
- How much capacity does the Fossibot F2400 deliver through an AC outlet?
- About 1,741 Wh of the rated 2,048 Wh reaches an AC outlet from a full charge — an estimate after our published 15% inverter-loss constant (marked est. on this page).
- How long does the Fossibot F2400 take to charge?
- 2 h from a wall outlet, 0 to 100%, manufacturer-claimed. Fast-charge modes and solar input differ — see the charging specs on this page.
- How many watts can the Fossibot F2400 output?
- 2,400 W continuous AC output and 4,800 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- How much solar input can the Fossibot F2400 accept?
- 500 W maximum solar input, manufacturer-claimed. Actual harvest depends on panel compatibility, sun, orientation, temperature, and conversion losses.
- What is the cycle-life rating of the Fossibot F2400?
- 3,500 cycles to 80% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.
- Can the Fossibot F2400 work as a UPS?
- Its manufacturer-claimed transfer time is 10 ms. Confirm that your connected equipment tolerates that transfer time; this is not the same as a zero-transfer online UPS.
Keep exploring
- Refrigerator runtime guide
- CPAP nights-per-charge calculator
- How Many Watts Does a Chest Freezer Use?
- How Many Watts Does a 12V Camping Fridge Use?
- How Many Watts Does an RV Refrigerator Use?
- How Many Watts Does an Electric Cooler Use?
- Portable Power for a 12-Hour Outage
- Power an RV Refrigerator and Lights
- Complete CPAP Overnight Power Kit