EcoFlow DELTA Pro Ultra

Name: EcoFlow DELTA Pro Ultra
Brand: EcoFlow

Ranked #1 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.

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#1 · Top pick

EcoFlow DELTA Pro Ultra

Best for: A modular 6 kWh inverter-and-battery system for whole-home backup

7.7/10

What we like

Biggest capacity and output here
5,600 W solar input
0 ms online UPS outlets
Expands to 90 kWh in multi-inverter systems

Watch out for

Two heavy modules (82.4 kg together)
Built around EcoFlow's home panels for full-home use

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	6144 Wh
Continuous AC output	7200 W
Max solar input	5600 W
Weight	82.4 kg
Max AC charging power	Not listed
240 V output (listed)	Yes
Rated cycle life	3500 cycles
Surge / peak output	10800 W
Capacity	6,144 Wh per battery; 30 kWh with five batteries per inverter
Chemistry	LFP
Cycle rating	80% capacity after 3,500 cycles
AC output	Pure sine, 7,200 W, 120/240 V; 10.8 kW surge
Solar input	5,600 W total (High-PV 4,000 W + Low-PV 1,600 W)
UPS	Backup UPS under 20 ms; online UPS 0 ms on listed outlets
Weight	Inverter 31.7 kg + battery 50.7 kg (82.4 kg combined, our sum)
Connectivity	Bluetooth, Wi-Fi and 4G
Price	Check price