Ductless mini-split 12,000 BTU: how much battery you need
Ductless mini-split 12,000 BTU (inverter) draws about 920 W (920–1450 W range), runs 50% of the time and uses 3680 Wh per day. Start-up surge: 1450 W.
Mitsubishi MSZ-GS12NA cooling: 920 W rated input, 1,450 W maximum. An inverter compressor ramps up slowly, so there is no motor start spike.
Battery needed
| Hours | Wh | Battery (Wh) | Inverter (W) |
|---|---|---|---|
| For 8 hours | 1227 | 1859 | 1013 / 1450 |
| For 24 hours | 3680 | 5576 | 1013 / 1450 |
| For 72 hours | 11040 | 16728 | 1013 / 1450 |
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Stations that fit (24 h)
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FAQ
How many watts does a Ductless mini-split 12,000 BTU (inverter) use?
Typically 920 W while running, with a range of 920–1450 W depending on model and age. Start-up surge can reach 1450 W.
How long will a 1000 Wh power station run a Ductless mini-split 12,000 BTU (inverter)?
About 1.4 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 Ductless mini-split 12,000 BTU (inverter) overnight (8 h)?
About 1859 Wh of battery and an inverter rated at least 1013 W continuous with 1450 W surge.
Can I run a Ductless mini-split 12,000 BTU (inverter) on solar during an outage?
You need roughly 2454 W of panels in winter to replace a day's use (3680 Wh), charging through a station with a big enough MPPT input.
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