Fit and tradeoffs
Who it's for
- Home backup for circuits this output can actually run.
- Adding battery capacity later.
Who it's not for
- Hiking or carrying it by hand for long.
- Any job that needs more than the rated continuous watts.
Pros
- The battery can take an add-on pack.
- UPS switchover is about 10 ms.
- It can charge from a solar panel, up to 2,600 W.
Cons
- 113.5 lb. Moving it takes two people or a cart.
Similar size
2,000 Wh and up, 4 models. This one is highlighted.
| Model | Capacity | Output | Score | List price | Price / Wh |
|---|---|---|---|---|---|
| Anker SOLIX F3800 | 3,840 Wh | 6,000 W | 9.1 | $2,999.99 | $0.78 / Wh |
| BLUETTI Elite 400 | 3,840 Wh | 2,600 W | 9.2 | $1,399.00 | $0.36 / Wh |
| Goal Zero Yeti PRO 4000 | 3,994 Wh | 3,600 W | 8.9 | $3,999.95 | $1.00 / Wh |
| EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W | 9.1 | $2,799.00 | $0.68 / Wh |
Score
9.1 / 10, from the four rows below. Each row is scored from 7.0 to 10.
CapacityWeight 35%
9.8
4,096 Wh
Continuous outputWeight 25%
9.5
4,000 W
WeightWeight 20%
7.2
113.5 lb · 51.48 kg
List priceWeight 20%
9.1
$0.68 / Wh
How to read this: The number compares models on the same specs. It is not a mark of absolute quality. The weights are on How we review.
Battery test
How much battery another site measured, next to the brand's number. Their test may use a different load.
| Source | Usable capacity | Share of rated | Note |
|---|---|---|---|
| OutdoorGearLab | 3,790 Wh | 93% | |
| ComputerBase | 3,911 Wh | 95% | Steady 500 W AC load on the 230 V version. The same page lists 3,999 Wh at 2,000 W. |
Runtime estimates
About how long EcoFlow DELTA Pro 3 runs common devices. Estimate, not a measurement: rated watt-hours × 85% ÷ the device's watts. Temperature, startup, and conversion loss change the real time.
| Device | Runtime (estimate) |
|---|---|
| Small fan (10 W) | About 348.2 hours |
| Phone fast charge (15 W) | About 232.1 hours |
| CPAP (40 W) | About 87 hours |
| Car fridge (60 W) | About 58 hours |
| Laptop (65 W) | About 53.6 hours |
| Electric kettle (1,000 W) | About 3.5 hours |
Full specs
Published by the brand.
| Capacity | 4,096 Wh |
|---|---|
| Chemistry | LiFePO4 |
| Cycle life | 4000 |
| Battery test | 3,790 Wh · 93% of rated |
| Continuous output | 4,000 W |
|---|---|
| Peak output | 8,000 W |
| Ports | AC outlets x 7, USB-C x 2, USB-A x 2, 12V car outlet |
| Expandable | Yes |
| UPS | Yes, about 10 ms |
| Solar input | 2,600 W |
|---|---|
| Solar voltage | HV 30–150V (1600W) + LV 11–60V (1000W); 2600W total |
| AC input | 1,800 W |
| Car charge | 960 W |
| Warranty | 5 years |
| Weight | 113.5 lb · 51.48 kg |
| Dimensions | 410.4 × 341 × 693 mm (16.16 × 13.43 × 27.28 in) |
| Noise | 30 dB · EcoFlow |
| List price | $2,799.00 on October 2026 |
Similar models
Goal Zero Yeti PRO 4000
3,994 Wh · 3,600 W$3,999.95
Anker SOLIX F3800
3,840 Wh · 6,000 W$2,999.99 · Sold out
BLUETTI Elite 400
3,840 Wh · 2,600 W$1,399.00When to pick something else
- Phones and lights on a smaller budget: Jackery Explorer 300, listed at less than half the price.
- Hiking or packing light: BLUETTI Elite 10, at 3.97 lb · 1.8 kg.
Reviews that include this model
Posts that include this model
- Goal Zero vs EcoFlowCompare
Editorial team · Updated November 1, 2026
Specs and the list price are checked against the sources linked on this page. About · How we review · Editorial policy
Specs and the list price are checked against the sources linked on this page. About · How we review · Editorial policy