EcoFlow DELTA 3 Ultra Plus vs Allpowers R4000

Side-by-side on the specs that decide it — surge, capacity, runtime and price.

Both models' specs verified against manufacturer listings · Last updated July 29, 2026

The short answer

EcoFlow DELTA 3 Ultra Plus costs $300 less. Whether that gap is worth closing depends on what you need to run.

Allpowers R4000 holds 13% more energy (3456Wh vs 3072Wh), so it runs the same load proportionally longer.
EcoFlow DELTA 3 Ultra Plus has 1200W more surge headroom (7200W vs 6000W) — that decides whether a fridge, pump or AC compressor will actually start.
EcoFlow DELTA 3 Ultra Plus is 20.5 lb lighter (85.5 lb vs 106 lb).
EcoFlow DELTA 3 Ultra Plus is rated for 4,000 cycles vs 3,500 — meaningful if you cycle it daily.

EcoFlow DELTA 3 Ultra Plus

The Ultra's solar problem solved: same everything, but 1600W of PV input instead of 800W. That doubles your off-grid refill speed for $200.

Best for: Off-grid cabins and van builds that actually recharge from panels.

Where it falls short:

$1999 approaches DELTA Pro 3 pricing
85.5 lb

Allpowers R4000

A large expandable unit that undercuts the EcoFlow Delta Pro 3 on price while matching its 4,000W output — the trade is a less established support network.

Best for: Whole-home backup buyers prioritising price per watt over brand.

Where it falls short:

106 lb
Brand support and resale trail the big names

Spec	EcoFlow DELTA 3 Ultra Plus	Allpowers R4000
Price	$1999	$2299
Capacity	3072 Wh	3456 Wh
Continuous output	3600 W	4000 W
Surge output	7200 W	6000 W
Battery	LiFePO4	LiFePO4
Rated cycles	4,000	3,500
Weight (lighter wins)	85.5 lb	106 lb
Max solar	1600 W	2000 W
Recharge time (faster wins)	1h 30m	1h 30m

Runtime head-to-head

Appliance	EcoFlow DELTA 3 Ultra Plus	Allpowers R4000
Refrigerator	43.5 hrs	49.0 hrs
Mini fridge	82.9 hrs	93.3 hrs
Chest freezer	32.6 hrs	36.7 hrs
CPAP machine	65.3 hrs	73.4 hrs
Sump pump	3.3 hrs	3.7 hrs

EcoFlow DELTA 3 Ultra Plus
Price → Allpowers R4000
Price →