Window AC 8,000 BTU: how much battery you need1
Window AC 8,000 BTU draws about 750 W (750 W range), runs 50% of the time and uses 3000 Wh per day. Start-up surge: 1800 W.
Estimate between the 5,000 and 10,000 BTU charts.
Battery needed
| Hours | Wh | Battery (Wh) | Inverter (W) |
|---|---|---|---|
| For 8 hours | 1000 | 1516 | 826 / 1800 |
| For 24 hours | 3000 | 4546 | 826 / 1800 |
| For 72 hours | 9000 | 13637 | 826 / 1800 |
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Stations that fit (24 h)
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FAQ
How many watts does a Window AC 8,000 BTU use?
Typically 750 W while running, with a range of 750 W depending on model and age. Start-up surge can reach 1800 W.
How long will a 1000 Wh power station run a Window AC 8,000 BTU?
About 1.8 hours on the clock, allowing for the 50% duty cycle, inverter losses and a 20% reserve.
What size power station do I need for a Window AC 8,000 BTU overnight (8 h)?
About 1516 Wh of battery and an inverter rated at least 826 W continuous with 1800 W surge.
Can I run a Window AC 8,000 BTU on solar during an outage?
You need roughly 2000 W of panels in winter to replace a day's use (3000 Wh), charging through a station with a big enough MPPT input.
Other sizes
Other appliances
1 Approximate values: estimated from motor or heater power and typical figures published online, not from a manufacturer chart. Check your appliance label.
Inverter efficiency 88%, usable depth of discharge 90%, reserve 20%. Full method: How we calculate.