The numbers
| DELTA 2 | |
|---|---|
| Battery | 1,024 WhLiFePO4 |
| Output | 1,800 W2,700 W surge |
| Starts it? | Yesneeds about 2,000 W |
| Runs it? | Yesdraws up to 800 W |
| A typical day's use | 14 hours to 4.4 days |
| Nonstop at full power | about 1 hour |
On a full charge, with no other loads. A sump pump uses 0.2–1.5 kWh a day and draws 300–800 W while pumping (⅓–½ hp); about 85% of the battery reaches the outlet after the inverter's losses. Needs power most during storms, exactly when the grid tends to fail.
Tip: Check its startup surge against your power station's rating.
Make it last longer
Folding solar panels refill it on sunny days. Add the rest of what you would run to see the whole picture.
Running it every day, off grid? How much power a sump pump uses sizes the solar for it.
Other questions like this
Sources
- EcoFlow DELTA 2 user manual (PDF) the maker's specs
- How much power a sump pump uses US Department of Energy estimates, nameplate ratings and owner measurements
Runtimes are calculated from these numbers, not measured. Your sump pump's label or a plug-in meter gives your exact draw. Spotted something out of date? Tell me.