EcoFlow DELTA 3 Ultra vs EcoFlow DELTA Pro 3: 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, battery life and solar input. The EcoFlow DELTA 3 Ultra wins on value and portability. The EcoFlow DELTA 3 Ultra costs $1,450 less ($1,349 vs $2,799).

Higher rated

EcoFlow DELTA Pro 3

#16 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

$2,799

EcoFlow DELTA 3 Ultra

#22 in Home backup3.7Full review

A wheeled 3kWh station for home backup or RV use at a lower price than its expandable sibling. Buy it if 3kWh is enough and you charge mostly from the wall.

Amazon $1,699 EcoFlow $1,349

$1,349

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 EcoFlow DELTA Pro 3 for tested capacity (93% of rated capacity delivered (1 test) vs 82% of rated capacity delivered (1 test)), battery life (LiFePO4, 4,000 cycles, 5-year warranty vs LiFePO4, 5-year warranty) and solar input (2,600 W max solar input vs 800 W max solar input).
Choose the EcoFlow DELTA 3 Ultra for value ($0.44 per rated Wh vs $0.68 per rated Wh) and portability (94 Wh per kg (72.1 lb (32.7 kg)) vs 80 Wh per kg (113.5 lb (51.5 kg))).

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 3 Ultra
Overall rating	3.8/5	3.7/5
Value 25%	41 $0.68 per rated Wh	79 $0.44 per rated Wh
Tested capacity 15%	100 93% of rated capacity delivered (1 test)	55 82% 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%	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)	50 full AC charge time not published (neutral score used)
Portability 10%	63 80 Wh per kg (113.5 lb (51.5 kg))	89 94 Wh per kg (72.1 lb (32.7 kg))
Solar input 5%	57 2,600 W max solar input	13 800 W max solar input
Features 5%	100 UPS (10 ms), expandable, 100 W USB-C, app	75 UPS (10 ms), 140 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.