EcoFlow · Mid-size (600 to 1,499 Wh)
EcoFlow DELTA 3 Classic
A mid-size unit, 1,024 Wh, 1,800 W (3,600 surge), 26.7 lb, $529 ($0.52 per Wh). It clears 3 of the six jobs on this site (cpap, rv, phones and laptops) and not home backup, camping, van life.
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Should you buy it?
Buy it for: a night of CPAP (a CPAP with its humidifier for one 8-hour night); a day in an RV (a 12 V fridge, lights, TV, coffee maker, phones and a laptop for a day); a laptop and two phones (a laptop for six hours and two phone charges).
Not for: a day of home backup (too little capacity: needs 2,323 Wh and 1,351 W at start-up); two nights of camping (too little capacity: needs 2,066 Wh and 157 W at start-up); a working day in a van (too little capacity: needs 2,295 Wh and 244 W at start-up).
At $0.52 per watt-hour compare its cost with the charging speed and carry weight you need. It stores 38.4 Wh per pound. 17 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 | 19.3 | yes |
| CPAP machine (with heated humidifier) (with heated humidifier) | 53 | 16.4 | yes |
| Refrigerator (full-size, ENERGY STAR, ~18 cu ft top freezer) (average draw, compressor cycling) | 41 | 21.1 | yes |
| Laptop (MacBook Air, charging) (charger rating, continuous) | 40 | 21.8 | yes |
| Wi-Fi router | 24 | 36.3 | yes |
| Starlink Standard kit (dish + router) | 88 | 9.9 | yes |
| TV, 50-inch LED / Crystal UHD | 89 | 9.8 | yes |
| Camp LED light set (4 chainable lights) (one bulb) | 6 | 138.2 | yes |
At a glance
3.8 / 5
| Criterion | Score | Why |
|---|---|---|
| Fit for the job | 3.4 | Clears 3 of the 6 jobs on this site (cpap, rv, phones and laptops); starts 16 of the 16 devices in the table |
| Value per watt-hour | 4.2 | $0.52 per Wh, 6th lowest of 18 mid-size units |
| Portability | 3.7 | 26.7 lb, 9th lightest of 18 mid-size units |
| Recharge speed | 3.7 | 500 W of solar input, about 2 hours of full sun to refill; 1,400 W from the wall |
| Chemistry and cycle life | 4.0 | LiFePO4; cycle life not stated |
| Expandability | 3.3 | No expansion stated; 10 ms UPS switchover |
| Owner-reported reliability | 4.5 | Fan noise, app, firmware, failures and warranty handling across 2 reviews |
Full spec sheet
| Capacity | 1,024 Wh |
|---|---|
| Chemistry | LiFePO4 |
| Rated cycle life | – |
| Expandable | – |
| Continuous AC output | 1,800 W |
|---|---|
| Surge (peak) output | 3,600 W |
| AC outlets | – |
| USB-C ports / highest output | 2 / 100 W |
| USB-A ports | – |
| 12 V outputs | – |
| Wireless charging pad | – |
| UPS / EPS switchover | 10 ms |
| Max AC input | 1,400 W |
|---|---|
| Wall recharge time | 1 h |
| Max solar input | 500 W |
| Stated solar recharge time | 2.5 h at maximum input |
| App control | yes |
| Weight | 26.7 lb (12.1 kg) |
|---|---|
| Dimensions | 15.7 x 7.9 x 11.1 in (398 x 200 x 283 mm) |
| Wh per lb | 38.4 |
| Release year | – |
| Warranty | 5 years |
| List price | $599 |
|---|---|
| Store price | $529 |
| Price per Wh | $0.52 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Anker SOLIX C1000 Gen 2 | 3.7 | 1,024 | 2,000 W (3,000 surge) | 24.9 | 600 | – | 4,000 to 80% | $530 | $0.52 | See it at Anker SOLIXCheck price on Amazon |
| BLUETTI Elite 100 V2 | 3.7 | 1,024 | 1,800 W (3,600 surge) | 25 | 1,000 | LiFePO4 | 4,000 to 80% | $899 | $0.88 | See it at BLUETTICheck price on Amazon |
| DJI Power 1000 | 3.7 | 1,024 | 2,200 W (4,400 surge) | 28.7 | 800 | LiFePO4 | 4,000 to 70% | $699 | $0.68 | See it at DJI |
| EcoFlow DELTA 3 | 4.0 | 1,024 | 1,800 W (3,600 surge) | 27.6 | 500 | LiFePO4 | 4,000 to 80% | $629 | $0.61 | See it at EcoFlowCheck price on Amazon |
| EcoFlow DELTA 3 Classic | 3.8 | 1,024 | 1,800 W (3,600 surge) | 26.7 | 500 | LiFePO4 | – | $529 | $0.52 | See it at EcoFlowCheck price on Amazon |
See it at EcoFlowCheck price on AmazonEvery 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 review: Consumer Reports, 2026-09-06
- independent test: StationArena, 2025-01-15
- How the figures and scores are made