BLUETTI AC180 Solar vs EcoFlow DELTA 3 1500
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 1500 holds around a third more battery — 1536Wh against 1152Wh — and that is what decides how long either one lasts on the same load.
Both invert to 1800W, 4 outlets, so the same appliances are on and off the table for either.
EcoFlow DELTA 3 1500 refills faster from the wall, accepting 1500W against 1440W.
Drawn from 8 specifications each maker publishes, of which 8 differ. We have not handled either machine — see our methodology.
Side by side
| Specification | BLUETTI AC180 Solar | EcoFlow DELTA 3 1500 |
|---|---|---|
| Battery capacity | 1152Wh | 1536Whbetter |
| AC output | 1800W, 4 outlets | 3600W (surge 3600W) |
| Max solar input | 500W | 500W |
| AC input | 1440W | 1500Wbetter |
| Weight | 35.3 lbs | 36 lbs/ 16.5kg |
| Dimensions | 13.4x9.7x12.5 in | 15.7 x 8.3 x 11.1 in(40 x 21 x 28 cm) |
| USB-C output | 1 × 100W max | 100W max |
| USB-A output | 2 × 15W max | 12W max |
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 AC180 Solar | EcoFlow DELTA 3 1500 |
|---|---|---|
| Laptop (60W) | 16 hours | 22 hours |
| CPAP, no humidifier (40W) | 1.0 days | 1.4 days |
| 12V camping fridge (45W average) | 22 hours | 1.2 days |
| Starlink or router (55W) | 18 hours | 24 hours |
| Full-size fridge (150W average) | 6.5 hours | 8.7 hours |
From solar alone, at 70% of the panel input each maker quotes — a realistic day rather than a lab figure — the BLUETTI AC180 Solar needs about 3.3 hours of good sun to refill , and the EcoFlow DELTA 3 1500 about 4.4 hours.
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 AC180 Solar — Cell chemistry: LiFePO4
- BLUETTI AC180 Solar — Cycle life: 3,500+ cycles to 80%
- BLUETTI AC180 Solar — AC outlets: 4 x 120V/15A
- BLUETTI AC180 Solar — Operating temperature: 4°F-104°F (86°F-104°F: 1,500W Max.)
- BLUETTI AC180 Solar — Warranty: 5 Years
- EcoFlow DELTA 3 1500 — DC output: 126W max
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 AC180 Solar on Amazon — search results for this model, as we do not have its listing on file
- EcoFlow DELTA 3 1500 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.