Window AC 5,000 BTU: how much battery you need
Window AC 5,000 BTU draws about 520 W (450–600 W range), runs 50% of the time and uses 2080 Wh per day. Start-up surge: 1200 W.
A small window unit for one bedroom; the compressor cycles on and off with the thermostat. Champion lists 450–600 W running; we use the middle for energy and the top starting figure (1200 W) for the peak.
Battery needed
| Hours | Wh | Battery (Wh) | Inverter (W) |
|---|---|---|---|
| For 8 hours | 693 | 1051 | 572 / 1200 |
| For 24 hours | 2080 | 3152 | 572 / 1200 |
| For 72 hours | 6240 | 9455 | 572 / 1200 |
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Stations that fit (24 h)
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FAQ
How many watts does a Window AC 5,000 BTU use?
Typically 520 W while running, with a range of 450–600 W depending on model and age. Start-up surge can reach 1200 W.
How long will a 1000 Wh power station run a Window AC 5,000 BTU?
About 2.5 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 5,000 BTU overnight (8 h)?
About 1051 Wh of battery and an inverter rated at least 572 W continuous with 1200 W surge.
Can I run a Window AC 5,000 BTU on solar during an outage?
You need roughly 1387 W of panels in winter to replace a day's use (2080 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. source