Scenario
How big a power station runs a space heater on low for 4 hours?
Our best fit is the EcoFlow DELTA Pro 3, at about 4.6 h calculated. The plan needs 3,000 Wh at the outlet over 4 hours and about 750 W at start-up, from maker specs and cited appliance figures checked .
Yes. EcoFlow DELTA Pro 3 runs a space heater on low for 4 hours for about 4.6 h. calculated from maker specs, .
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Goal: 4 h. Hours use maker inverter efficiency where published, otherwise the 0.85 estimate, and leave out idle draw the maker doesn't publish. Stations shown out of stock or with availability not shown are skipped. How we pick.
Open this plan in the calculator to change hours, watts, solar or temperature.
Devices and assumptions
| Device | Qty | Hours a day | Running | Starting | Source |
|---|---|---|---|---|---|
| Space heater (Low) | 1 | On the whole time | 750 W | No extra | Champion wattage chart |
Together: 750 W running, about 750 W while the largest motor starts, and 18,000 Wh a day. Over the 4-hour goal that is 3,000 Wh at the outlet calculated.
- Low setting is the bottom of the Champion chart range for a space heater.
- The heater runs the whole time; a thermostat would cycle it.
Stations that fit, cheapest first
| Station | Hours calculated | Starting headroom | List price |
|---|---|---|---|
| Anker SOLIX F3800 Plus | 4.4 h | 88% | $2,599.99 |
| EcoFlow DELTA Pro 3 | 4.6 h | 91% | $2,799 |
| Goal Zero Yeti PRO 4000 | 4.5 h | 90% | $3,999.95 |
3 of 43 stations in our data fit, counting out-of-stock and unpriced ones; this table shows the cheapest in-stock ones.
What would change this answer
- Your own device watts: the label on the device beats any typical figure. Enter it in the calculator.
- Inverter idle draw: most makers don't publish it, so hours here leave it out. Small loads feel this most.
- Cold: below a maker's temperature range a station may stop discharging or charging.
Our take
Space heaters turn a battery into heat faster than any other common load, so even the low setting needs a large station for a few hours. Heating one small room, or using a heated blanket, stretches the battery much further.
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