Fossibot F2400
47BatteryRank score · Limited
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Fossibot F2400 vs Oupes Mega 2 Pro
Decision readout
Better station
Oupes Mega 2 Pro leads by 22 points overall.
Oupes Mega 2 Pro
69BatteryRank score · Balanced
What changes the decision
- Home backup: Oupes Mega 2 Pro — higher AC output
- Camping & RV: Fossibot F2400 — lighter and easier to carry
01 · Score evidence
Score breakdown
47
Fossibot F2400
Overall
69
Oupes Mega 2 Pro
50
POWER
Oupes Mega 2 Pro +22
72
Battery-side usable capacity and how much you can run at once.
62
TRUST
Oupes Mega 2 Pro +22
84
Owner reputation, safety record, warranty, and build durability.
22
CHARGING
Oupes Mega 2 Pro +42
64
Wall and solar recharge speed.
53
LIVABILITY
Fossibot F2400 +16
37
Lightweight, portable, and quiet enough to live with.
Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.
02 · Usable energy
Capacity truth
The watt-hours on the box aren't what reaches your devices. Same scale, both units.
Fossibot F2400
Rated (on the box)
2,048 Wh. Show source
claimed sourcefossibot.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
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.
Oupes Mega 2 Pro
Rated (on the box)
2,048 Wh. Show source
claimed sourceoupes.com ↗2026-07-27The marketing number — total cell capacity.
AC delivered (est.)
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.
03 · Same assumptions
Same-device runtime
| Device | Fossibot F2400 | Oupes Mega 2 Pro | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 24.2 nights | about 24.2 nights | 9 W · |
| CPAP (heated humidifier on) | about 3.9 nights | about 3.9 nights | 56 W · |
| Refrigerator (full-size) | about 28 hours | about 28 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 97 hours | about 97 hours | 18 W · |
| Laptop (65W charger) | about 54 hours | about 54 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 87 full charges | about 87 full charges | 20 W · |
One device at a time; estimates use each station's usable AC energy. Build your own load →
04 · Sourced hardware
Key specs, side by side
| Spec | Fossibot F2400 | Oupes Mega 2 Pro |
|---|---|---|
| AC-delivered capacity | 1,741 Whest.. Show sourceestimated sourcefossibot.com ↗2026-07-04 | 1,741 Whest.. Show sourceestimated sourceoupes.com ↗2026-07-27 |
| Continuous power output | 2,400 W. Show sourceclaimed sourcefossibot.com ↗ | 2,500 W. Show sourceclaimed sourceoupes.com ↗ |
| Surge power output | 4,800 W. Show sourceclaimed sourcefossibot.com ↗ | 3,800 W. Show sourceclaimed sourceoupes.com ↗ |
| Max solar input | 500 W. Show sourceclaimed sourcefossibot.com ↗ | 1,000 W. Show sourceclaimed sourceoupes.com ↗ |
| AC charge time (0–100%) | 120 min. Show sourceclaimed sourcefossibot.com ↗ | — |
| Weight | 22 kg. Show sourceclaimed sourcefossibot.com ↗ | 22.1 kg. Show sourceclaimed sourceoupes.com ↗ |
| Rated cycle life | 3,500 cycles. Show sourceclaimed sourcefossibot.com ↗ | 4,000 cycles. Show sourceclaimed sourceoupes.com ↗ |
Only show differences
- Continuous power output2,400 W2,500 W
- Surge power output4,800 W3,800 W
- Max solar input500 W1,000 W
- AC charge time (0–100%)120 min—
- Weight22 kg22.1 kg
- Rated cycle life3,500 cycles4,000 cycles
Manufacturer figures unless marked verified or est. Tap or focus a figure to view its source. The better reading in each row is highlighted — lower wins for weight and recharge time.
Where these rank
Quick answers
- Is the Fossibot F2400 better than the Oupes Mega 2 Pro?
- Oupes Mega 2 Pro leads by 22 points overall.
- Which has more usable capacity, the Fossibot F2400 or Oupes Mega 2 Pro?
- Neither, in any way you would notice: 1,741 Wh against 1,741 Wh is a 0% gap, which is smaller than the swing you get from running the same load on a cold morning. Treat them as the same size and decide on output, weight, or today's price instead. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices.
- Which has more AC output, the Fossibot F2400 or Oupes Mega 2 Pro?
- The Oupes Mega 2 Pro: 2,400 W versus 2,500 W continuous. That gap matters only if a load sits between the two numbers — below 2,400 W both run it, above 2,500 W neither does. Surge headroom follows the same order: 4,800 W against 3,800 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the Fossibot F2400 and Oupes Mega 2 Pro?
- They run within 0% of each other on the same load — about 27.6 hours each on a refrigerator (full-size). Runtime will not separate these two; the deciding factor is somewhere else.
- Which is lighter, the Fossibot F2400 or Oupes Mega 2 Pro?
- They are effectively the same to carry — 22 kg against 22.1 kg. Neither is meaningfully easier to move, so portability should not decide this one.
- Which model should I buy for my use case?
- On the sub-scores that describe each use case: the Oupes Mega 2 Pro for home backup; the Fossibot F2400 for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
Keep deciding
- Full scorecard, specs & price for Fossibot F2400 →
- Full scorecard, specs & price for Oupes Mega 2 Pro →
- See more alternatives to Fossibot F2400 →
- See more alternatives to Oupes Mega 2 Pro →
- What size do you need? →
- Browse all rankings →
- Check device runtime evidence →
- Compare outage and trip load plans →
- Browse complete power kits →
- Capacity vs output explained →
- Battery cycle-life thresholds →
- UPS behavior explained →