The DELTA 3800 Gen4 offers 3,763Wh and 3,600W output with a 10 ms switchover — and unlike the 3000, it can expand, up to 12,000Wh with extra batteries.
3,763Wh capacity · 3,600W continuous output · 67.46 lbs
Calculated runtimes
Planning estimates calculated from the manufacturer’s rated capacity — not measured results. We count 85% of rated capacity as usable, a full-size fridge at 1,500Wh per day, and a CPAP at 480Wh per night.
| Usable capacity (85%) | 3,199 Wh |
|---|---|
| Full-size fridge runtime | 2.1 days |
| CPAP runtime | 6.7 nights |
| Cost per watt-hour | $0.584 |
Specifications
| Manufacturer | EcoFlow |
|---|---|
| Model | EcoFlow DELTA 3800 Gen4 |
| Capacity | 3,763 Wh |
| AC output (continuous) | 3,600 W |
| Surge / peak output | 7,200 W |
| Weight | 67.46 lbs |
| Max solar input | 2,000 W |
| UPS / EPS switchover | ≤ 10 ms |
| Expandable to | 12,000 Wh |
| List price | $2,199 |
| Price checked | November 11, 2026 |
Compare with similar stations
Closest in capacity: EcoFlow DELTA 3000 Gen4 (3,072Wh) · BLUETTI Elite 300 (3,014.4Wh) · BLUETTI Apex 300 (2,764.8Wh). Or see all 17 stations in the portable power station comparison chart.
Common questions
How long will the EcoFlow DELTA 3800 Gen4 run a full-size fridge?
About 2.1 days on a full charge, using our planning figures (85% of rated capacity usable, fridge at 1,500Wh per day). Real runtime depends on the fridge’s duty cycle and ambient temperature.
How many nights will it run a CPAP?
About 6.7 nights at 480Wh per night (60W for 8 hours, humidifier on). Turning the humidifier and heated tube off stretches that considerably.
Can its capacity be expanded?
Yes — with the manufacturer’s extra batteries it grows from 3,763Wh to 12,000Wh.
Does it work as a UPS?
Its published switchover is ≤ 10 ms, fast enough for most electronics to ride through an outage without rebooting.
Run your own numbers: the power station size calculator, the refrigerator runtime calculator, and the CPAP calculator all include this station where applicable.
Specifications are the manufacturer’s published figures, checked November 11, 2026. Runtime figures are calculated planning estimates, not measured results. GadgetPreview may earn a commission from qualifying purchases made through links on this page.