The numbers
| DELTA Pro 3 | |
|---|---|
| Battery | 4,096 WhLiFePO4 |
| Output | 4,000 W8,000 W surge, 120V and 240V |
| Starts it? | Yesneeds about 2,000 W |
| Runs it? | Yesdraws up to 1,000 W |
| A typical day's use | 10–28 hours |
| Nonstop at full power | about 3 hours |
On a full charge, with no other loads. A window air conditioner uses 3.0–8.0 kWh a day and draws 500–1,000 W (8,000–12,000 BTU); about 85% of the battery reaches the outlet after the inverter's losses. Heat is the enemy: it runs hardest exactly when the sun is strongest, which helps solar keep up.
Tip: Cool one room, not the house, during an outage.
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 window air conditioner uses sizes the solar for it.
Other questions like this
Sources
- EcoFlow DELTA Pro 3 product page the maker's specs
- How much power a window air conditioner uses US Department of Energy estimates, nameplate ratings and owner measurements
Runtimes are calculated from these numbers, not measured. Your window air conditioner's label or a plug-in meter gives your exact draw. Spotted something out of date? Tell me.