EcoFlow DELTA 3 Max Plus vs FOSSiBOT F2400: Which to Buy

The FOSSiBOT F2400 is the better portable power station overall, rated 4.2 to 3.7. The FOSSiBOT F2400 leads on value, battery life and tested capacity. The EcoFlow DELTA 3 Max Plus wins on AC output, solar input and features. The FOSSiBOT F2400 costs $620 less ($579 vs $1,199).

Higher rated

FOSSiBOT F2400

#6 in Large4.2Full 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

EcoFlow DELTA 3 Max Plus

#25 in Large3.7Full review

A 2kWh home-backup station with enough output for most household circuits and room to expand to 10 kWh. A good fit for buyers who want to start mid-size and grow later.

Amazon $1,199

$1,199

Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Choose the FOSSiBOT F2400 for value ($0.28 per rated Wh vs $0.59 per rated Wh), battery life (LiFePO4, 4,000 cycles, 5-year warranty vs LiFePO4, 5-year warranty) and tested capacity (84% of rated capacity delivered (2 tests) vs 80% of rated capacity delivered (1 test)).
Choose the EcoFlow DELTA 3 Max Plus for AC output (3,000 W continuous AC vs 2,400 W continuous AC), solar input (1,000 W max solar input vs 500 W max solar input) and features (UPS (10 ms), expandable, 140 W USB-C, app vs UPS (8 ms), 100 W USB-C, app).

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every large portable power station; a clear win is highlighted. How we rank explains each one.

Factor weight	FOSSiBOT F2400	EcoFlow DELTA 3 Max Plus
Overall rating	4.2/5	3.7/5
Value 25%	100 $0.28 per rated Wh	56 $0.59 per rated Wh
Tested capacity 15%	64 84% of rated capacity delivered (2 tests)	46 80% of rated capacity delivered (1 test)
Battery life 15%	100 LiFePO4, 4,000 cycles, 5-year warranty	70 LiFePO4, 5-year warranty
AC output 15%	54 2,400 W continuous AC	79 3,000 W continuous AC
Charging speed 10%	63 0-100% on AC in 2 h	50 full AC charge time not published (neutral score used)
Portability 10%	87 93 Wh per kg (48.5 lb (22 kg))	87 93 Wh per kg (48.7 lb (22.1 kg))
Solar input 5%	11 500 W max solar input	40 1,000 W max solar input
Features 5%	75 UPS (8 ms), 100 W USB-C, app	100 UPS (10 ms), expandable, 140 W USB-C, app

Independent capacity tests

FOSSiBOT F2400

Tested by	Usable AC energy	Of rated	Conditions
techtest.org	1,781 Wh	87%	European 230V model, AC outlets at a 1,200W load (from the review’s capacity chart). Other AC runs: 1,717 Wh at 2,000W and 1,512 Wh at 100W. Full AC recharge took about 2 h 45 min at the 1,100W setting.
nextpit	1,659 Wh	81%	Full discharge of the European 230V model (load not stated); 2,127 Wh from the wall to recharge, about 78% round trip.