BLUETTI AC70 vs EcoFlow DELTA 3 Plus

These are not the same class. One carries noticeably more battery than the other, so this is really a question about how much power you need rather than which brand builds better.

One is a size up

EcoFlow DELTA 3 Plus holds around a third more battery — 1024Wh against 768Wh — and that is what decides how long either one lasts on the same load.

EcoFlow DELTA 3 Plus inverts to 1800W where the other stops at 1000W, 2 outlets. That is the difference between running an appliance and not running it, and no amount of battery makes up for it.

BLUETTI AC70 is the lighter of the two at 22.5 lbs, by 5.1 lb.

EcoFlow DELTA 3 Plus refills faster from the wall, accepting 1500W against 950W.

EcoFlow DELTA 3 Plus is rated for more charge cycles (4000 cycles to 80+% against 3,000+ cycles to 80%) — though makers do not all test to the same remaining capacity, so read those two numbers side by side rather than as a ranking.

Drawn from 7 specifications each maker publishes, of which 7 differ. We have not handled either machine — see our methodology.

Side by side

Specification	BLUETTI AC70	EcoFlow DELTA 3 Plus
Battery capacity	768Wh	1024Whbetter
AC output	1000W, 2 outlets	1800Wbetter
AC input	950W	1500Wbetter
Cell chemistry	LiFePO4	LFP
Cycle life	3,000+ cycles to 80%	4000 cycles to 80+%better
Weight	22.5 lbsbetter	Approx. 12.5kg（27.6 lb）
Dimensions	12.4x8.2x10.1 in	Approx. 398x202x283.6mm（16x8.0x11 in）

What the extra battery buys you

Watt-hours are hard to picture, so here is each pack as runtime on the loads a machine this size is usually bought for. Both columns assume 85% inverter efficiency — the conservative end of what these are rated at — so read every figure as a floor.

Load	BLUETTI AC70	EcoFlow DELTA 3 Plus
Laptop (60W)	11 hours	15 hours
CPAP, no humidifier (40W)	16 hours	22 hours
12V camping fridge (45W average)	15 hours	19 hours
Starlink or router (55W)	12 hours	16 hours
Full-size fridge (150W average)	4.4 hours	5.8 hours

From solar alone, at 70% of the panel input each maker quotes — a realistic day rather than a lab figure — the BLUETTI AC70 needs about 2.2 hours of good sun to refill .

Published by only one of them

A figure missing from a spec sheet is not a zero — it is a number the maker chose not to state. These appear on one page and not the other, so they cannot be compared, only noted.

BLUETTI AC70 — Max solar input: 500W
BLUETTI AC70 — AC outlets: 2×120V/8.33A, 1,000W in
BLUETTI AC70 — Operating temperature: 32°F - 104°F / 0°C - 40°C
BLUETTI AC70 — Charge time: 1.3-1.6 Hours (950W Turbo)
EcoFlow DELTA 3 Plus — Warranty: 5 years
EcoFlow DELTA 3 Plus — Noise: 600W<30db;1200W<40db

Where this comparison stops

Everything above is what the makers publish, not what either machine did in front of us. We own neither, so there is no noise measurement, no thermal behaviour under sustained load, and no view on how either holds up after two years. Makers also measure differently — cycle life at 80% capacity is not the same test as cycle life at 70% — so figures that look comparable sometimes are not. Treat this as a way to build a shortlist quickly, and read the caveats on our methodology page before you let a number decide.

Check current prices

Neither figure above is a price. These two move independently and often, and whichever is discounted this week is usually the answer when the specifications are as close as they are here.

BLUETTI AC70 on Amazon — search results for this model, as we do not have its listing on file
EcoFlow DELTA 3 Plus on Amazon — search results for this model, as we do not have its listing on file

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Specifications retrieved 2026-09-17 from bluettipower.com and us.ecoflow.com. Figures change without notice; check the maker's page before buying.