The numbers
| DELTA 2 | |
|---|---|
| Battery | 1,024 WhLiFePO4 |
| Output | 1,800 W2,700 W surge |
| Starts it? | Yesneeds about 1,500 W |
| Runs it? | Yesdraws up to 1,500 W |
| A typical day's use | 1–3 hours |
| Nonstop at full power | about 35 minutes |
On a full charge, with no other loads. A space heater uses 6.0–18.0 kWh a day and draws 1,500 W on high, ~750 W on low; about 85% of the battery reaches the outlet after the inverter's losses. Electric resistance heat is the hungriest thing you can run on batteries. It drains a power station in about an hour.
Tip: For outages, heat with wood or propane and save batteries for the fridge and lights.
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 space heater 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 space heater uses US Department of Energy estimates, nameplate ratings and owner measurements
Runtimes are calculated from these numbers, not measured. Your space heater's label or a plug-in meter gives your exact draw. Spotted something out of date? Tell me.