EcoFlow DELTA Pro vs EcoFlow DELTA Pro 3: Specs, Tests & Which to Buy

The EcoFlow DELTA Pro 3 is the better portable power station overall, rated 3.8 to 3.7. The EcoFlow DELTA Pro 3 leads on tested capacity, features and AC output. The EcoFlow DELTA Pro wins on value. The EcoFlow DELTA Pro costs $1,000 less ($1,799 vs $2,799).

Higher rated

EcoFlow DELTA Pro 3

#15 in Home backup3.8Full review

For households that want a single wheeled unit able to back up 240V circuits and expand toward whole-home capacity.

Amazon $2,799 EcoFlow $2,799

$2,799

EcoFlow DELTA Pro

#21 in Home backup3.7Full review

A heavy 3.6kWh station built for home backup that can grow into a 25 kWh system. It still makes sense if you want that expansion path, but newer models give similar capacity for less.

Amazon $1,799 EcoFlow $1,799

$1,799

Prices were last checked October 20, 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 EcoFlow DELTA Pro 3 for tested capacity (93% of rated capacity delivered (1 test) vs 84% of rated capacity delivered (2 tests)), features (UPS (10 ms), expandable, 100 W USB-C, app vs expandable, 100 W USB-C, app) and AC output (4,000 W continuous AC vs 3,600 W continuous AC).
Choose the EcoFlow DELTA Pro for value ($0.50 per rated Wh vs $0.68 per rated Wh).

Scores side by side

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

Factor weight	EcoFlow DELTA Pro 3	EcoFlow DELTA Pro
Overall rating	3.8/5	3.7/5
Value 25%	41 $0.68 per rated Wh	69 $0.50 per rated Wh
Tested capacity 15%	100 93% of rated capacity delivered (1 test)	66 84% of rated capacity delivered (2 tests)
Battery life 15%	100 LiFePO4, 4,000 cycles, 5-year warranty	96 LiFePO4, 3,500 cycles, 5-year warranty
AC output 15%	46 4,000 W continuous AC	37 3,600 W continuous AC
Charging speed 10%	50 full AC charge time not published (neutral score used)	41 0-100% on AC in 2 h 42 min
Portability 10%	63 80 Wh per kg (113.5 lb (51.5 kg))	64 80 Wh per kg (99 lb (45 kg))
Solar input 5%	57 2,600 W max solar input	35 1,600 W max solar input
Features 5%	100 UPS (10 ms), expandable, 100 W USB-C, app	65 expandable, 100 W USB-C, app

Independent capacity tests

EcoFlow DELTA Pro 3

Tested by	Usable AC energy	Of rated	Conditions
OutdoorGearLab	3,790 Wh	92.5%	Full-discharge AC test; OutdoorGearLab states over 93%, 3790/4096 works out to 92.5%. Recharged from empty in about 3.2 h at about 1600W peak.