EcoFlow DELTA Pro 3

Name: EcoFlow DELTA Pro 3
Brand: EcoFlow

Ranked #4 of 8 in Best Home Backup Power Stations and Whole-Home Batteries (2026). Here is every spec we scored, where it came from, and how it compares.

Affiliate disclosure: We earn a commission if you buy through links on this page, at no extra cost to you. It never affects our rankings, which come from the published scoring formula. As an Amazon Associate I earn from qualifying purchases. Learn more.

EcoFlow DELTA Pro 3

Best for: 4 kWh with 120/240 V outlets and 2,600 W solar

4.1/10

What we like

120/240 V on the unit, including L14-30R
2,600 W dual solar input
4,000 cycles to 80%
10 ms UPS

Watch out for

Over 50 kg
Not compatible with DELTA Pro or DELTA Pro Ultra accessories (EcoFlow note)

Score breakdown

Battery capacity 25%

Continuous AC output 20%

Max solar input 15%

Weight 10%

Max AC charging power * 5%

240 V output (listed) 10%

Rated cycle life 10%

Surge / peak output 5%

* Not published by the manufacturer; scored at the category median so missing data neither helps nor hurts.

Battery capacity	4096 Wh
Continuous AC output	4000 W
Max solar input	2600 W
Weight	51.5 kg
Max AC charging power	Not listed
240 V output (listed)	Yes
Rated cycle life	4000 cycles
Surge / peak output	8000 W
Chemistry	LFP
Cycle rating	4,000 cycles to 80%
AC output	4,000 W (6,000 W X-Boost), 8,000 W surge; 120/240 V
Outlets	4 × NEMA 5-20R, TT-30R, 6-20R (240 V), L14-30R (120/240 V)
Solar input	2,600 W total (High-PV 1,600 W + Low-PV 1,000 W)
Expansion	12 kWh with 2 extra batteries; 48 kWh systems with EcoFlow Smart Home Panel 2
UPS	10 ms
IP rating	IP65 battery
Weight	51.5 kg (113.54 lb)
Price	Check price