EcoFlow DELTA Pro 3: runtime & specs
4,096 Wh · 4,000 W continuous AC · 2,600 W max solar input · LFP (LiFePO4). Specs below are the manufacturer's published figures — continuous and surge watts are separate numbers here, because they are separate numbers in reality.
Manufacturer specifications
| Capacity | 4,096 Wh |
|---|---|
| Maximum capacity with expansion | 12,288 Wh |
| AC output (continuous) | 4,000 W |
| AC output (surge) | 8,000 W |
| X-Boost | 6,000 W — resistive loads only; not used in our start check or sizing math |
| Maximum solar input | 2,600 W |
| Solar input voltage range | 11-150V / 11-60V (two ports) |
| Battery chemistry | LFP (LiFePO4) |
| Cycle life | 4,000 cycles to 80% capacity |
| AC charging input (max) | Not published in the source retrieved |
| Weight | 113.5 lbs |
Source: manufacturer spec sheet via an authorized dealer · pulled 2026-10-19. Expansion: Up to 2 x 4096Wh extra batteries (12kWh total). If a row says "not published", the manufacturer doesn't publish that figure in the source we retrieved — we leave it blank rather than guess.
View on the manufacturer's site
What it runs, and for how long
Estimates use our published formula — capacity × 0.85 ÷ load, duty cycle applied to cycling loads, and a start check against the surge rating (methodology). Loads that fail the start check are marked, not given a fake runtime.
| Load | Estimated runtime |
|---|
Try your own load
EcoFlow DELTA Pro 3 questions
How long will the EcoFlow DELTA Pro 3 run a refrigerator?
About 12.4 hours for a typical fridge at a 40% compressor duty cycle (700 W nameplate draw while running), using our standard formula: 4,096 Wh × 0.85 ÷ 280 W average. That is the duty-cycled figure; the same station runs the fridge for about 5.0 hours if the compressor never cycles off.
How long will it run a CPAP?
About 87.0 hours at 40 W — a typical CPAP without a heated humidifier — or roughly 10.9 nights at 8 hours a night. With a heated humidifier (~90 W) expect about 38.7 hours. That's device runtime math only; see the CPAP calculator for your device's actual wattage.
How long does it take to recharge from solar?
With 400 W of panels, the EcoFlow DELTA Pro 3 needs about 13.1 hours of full sun for a full charge after the 0.78 real-world derate. Try other panel sizes in the solar charging calculator.
WattLong is reader-supported. Some links on this site are affiliate links: if you buy through them, we may earn a commission at no extra cost to you. See our affiliate disclosure. All results are estimates — verify with the manufacturer and a licensed electrician before relying on them.