EcoFlow · Large (1,500 to 3,499 Wh)
EcoFlow DELTA 3 Ultra
A large unit, 3,072 Wh, 3,600 W (7,200 surge), 72.1 lb, $1,399 ($0.46 per Wh). It clears every job on this site, from a night of CPAP to a day of home backup.
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Should you buy it?
Buy it for: a day of home backup (a full-size refrigerator, a router, phones and lights for a day); a night of CPAP (a CPAP with its humidifier for one 8-hour night); two nights of camping (a compressor cooler, lights, phones, a laptop and a fan for two nights); a day in an RV (a 12 V fridge, lights, TV, coffee maker, phones and a laptop for a day); a working day in a van (a working day of laptop, Starlink, fridge, lights and a fan); a laptop and two phones (a laptop for six hours and two phone charges).
At $0.46 per watt-hour compare its cost with the charging speed and carry weight you need. It stores 42.6 Wh per pound. 18 other current units share its size class; the nearest four by capacity are compared below.
What it runs, and for how long
Hours = capacity × 0.85 ÷ device watts, with the draws from the device table.
| Device | Draw W | Hours | Can it start it? |
|---|---|---|---|
| CPAP machine (no heated humidifier) (without humidifier) | 45 | 58 | yes |
| CPAP machine (with heated humidifier) (with heated humidifier) | 53 | 49.3 | yes |
| Refrigerator (full-size, ENERGY STAR, ~18 cu ft top freezer) (average draw, compressor cycling) | 41 | 63.2 | yes |
| Laptop (MacBook Air, charging) (charger rating, continuous) | 40 | 65.3 | yes |
| Wi-Fi router | 24 | 108.8 | yes |
| Starlink Standard kit (dish + router) | 88 | 29.8 | yes |
| TV, 50-inch LED / Crystal UHD | 89 | 29.3 | yes |
| Camp LED light set (4 chainable lights) (one bulb) | 6 | 414.5 | yes |
At a glance
3.9 / 5
| Criterion | Score | Why |
|---|---|---|
| Fit for the job | 4.4 | Clears all 6 jobs on this site; starts 16 of the 16 devices in the table |
| Value per watt-hour | 4.0 | $0.46 per Wh, 7th lowest of 19 large units |
| Portability | 2.8 | 72.1 lb, 16th lightest of 19 large units |
| Recharge speed | 3.1 | 800 W of solar input, about 3.8 hours of full sun to refill; 1,800 W from the wall |
| Chemistry and cycle life | 4.0 | LiFePO4; cycle life not stated |
| Expandability | 3.8 | Grows to 11,000 Wh with extra batteries; 10 ms UPS switchover |
| Owner-reported reliability | 5.0 | Fan noise, app, firmware, failures and warranty handling across 3 reviews |
Full spec sheet
| Capacity | 3,072 Wh |
|---|---|
| Chemistry | LiFePO4 |
| Rated cycle life | – |
| Expandable | yes, to 11,000 Wh |
| Continuous AC output | 3,600 W |
|---|---|
| Surge (peak) output | 7,200 W |
| AC outlets | 5 |
| USB-C ports / highest output | 3 / 140 W |
| USB-A ports | 1 |
| 12 V outputs | 1 |
| Wireless charging pad | – |
| UPS / EPS switchover | 10 ms |
| Max AC input | 1,800 W |
|---|---|
| Wall recharge time | 1.5 h to 80% |
| Max solar input | 800 W |
| Stated solar recharge time | – |
| App control | yes |
| Weight | 72.1 lb (32.7 kg) |
|---|---|
| Dimensions | 24.6 x 12.9 x 15.6 in (626 x 328 x 395 mm) |
| Wh per lb | 42.6 |
| Release year | – |
| Warranty | 5 years |
| List price | $1,599 |
|---|---|
| Store price | $1,399 |
| Price per Wh | $0.46 |
Before using the battery's cycle rating to judge value, read what LiFePO4 versus NMC means for lifespan and weight.
The solar-input wattage alone does not establish panel compatibility. Check how to match panel watts, voltage and connectors, then confirm the limits in this unit's manual.
Alternatives at this size
Listed smallest to largest by capacity; this unit is among them.
| Unit | Overall score | Wh | Output W (surge) | lb | Solar in W | Chemistry | Cycles | Price $ | $ / Wh | Store |
|---|---|---|---|---|---|---|---|---|---|---|
| BLUETTI Elite 300 | 3.5 | 3,014 | 2,400 W (4,800 surge) | 58 | 1,200 | LiFePO4 | 6,000 to 80% | $1,499 | $0.50 | See it at BLUETTICheck price on Amazon |
| Anker SOLIX F3000 | 4.1 | 3,072 | 3,600 W (7,200 surge) | 91.5 | 2,400 | LiFePO4 | 4,000 to 80% | $1,500 | $0.49 | See it at Anker SOLIXCheck price on Amazon |
| EcoFlow DELTA 3 Ultra | 3.9 | 3,072 | 3,600 W (7,200 surge) | 72.1 | 800 | LiFePO4 | – | $1,399 | $0.46 | See it at EcoFlow |
| Jackery HomePower 3000 | 3.6 | 3,072 | 3,600 W (7,200 surge) | 59.5 | 1,000 | LiFePO4 | 4,000 to 70% | $1,399 | $0.46 | See it at JackeryCheck price on Amazon |
| OUPES Mega 3 | 4.0 | 3,072 | 3,600 W (7,000 surge) | 83.3 | 2,100 | LiFePO4 | 3,500 to 80% | $1,099 | $0.36 | See it at OUPES |
See it at EcoFlowEvery current EcoFlow unitDoes it hold enough for your devices?
Sources
- specs: us.ecoflow.com, 2026-09-06
- price: us.ecoflow.com, 2026-09-06
- independent test: TheSolarLab
- independent test: Appleinsider, 2025-11-16
- independent review: Backuppowerhub, 2026-03-22
- How the figures and scores are made