Can a Power Station Run Central Air Conditioning?
Updated 2026-09-30
Short answer: a few of the largest home-backup power stations can start and run a smaller central AC system, but only for a few hours, and only if it's wired in properly. For most people, keeping one room cool with a window unit is the more realistic outage plan. Here's how to work out where your system falls.
Central AC is hardwired at 240V. Running it from a power station means a transfer switch or power inlet installed by a licensed electrician. Never backfeed a house through an outlet.
Check three numbers on your condenser
The outdoor unit has a nameplate (usually on the side panel):
- Voltage. Residential central AC is almost always 240V, so the station must have 240V output. Most portable stations are 120V only.
- RLA (rated load amps). This is the compressor's running current. Multiply by 240 for a rough running wattage: a 12A RLA is about 2,900W. Add a few hundred watts for the indoor blower. As a loose guide, older systems use roughly 1,000W or more per ton of cooling; newer high-efficiency ones use less.
- LRA (locked rotor amps). This is the current the compressor pulls for a split second when it starts. LRA figures of 50–100A or more are common, meaning a starting surge of well over 10,000W. This is the number that trips power stations.
Which stations can do it?
You need 240V output, a continuous rating above the running draw, and a surge rating above the start-up draw. In our data, the stations with 240V output are:
| Station | Capacity | Output | Surge |
|---|---|---|---|
| EcoFlow DELTA Pro Ultra | 6,144Wh | 7,200W | 10,800W |
| Jackery Explorer 5000 Plus | 5,040Wh | 7,200W | 14,400W |
| Anker SOLIX F3800 | 3,840Wh | 6,000W | 6,000W* |
| EcoFlow DELTA Pro 3 | 4,096Wh | 4,000W | 6,000W |
| BLUETTI Apex 300 | 2,765Wh | 3,840W | 7,680W |
*Anker doesn't publish a separate surge figure for the F3800.
Even the biggest of these may not start a compressor with a high LRA on its own. A soft starter fitted to the condenser (an HVAC technician's job) cuts the starting surge sharply, often enough to bring a 2–3 ton system within reach of a large station. Check with the soft-starter maker and the station maker before counting on it.
How long will the battery last?
This is the real limit. A central AC system that draws 3,000W while the compressor runs, cycling on about half the time on a hot day, uses roughly 1.5kWh every hour.
| Station capacity | ~1.5kWh/hour (hot day) | ~0.75kWh/hour (mild day) |
|---|---|---|
| 3,840Wh | ~2.5 hours | ~5 hours |
| 6,144Wh | ~4 hours | ~8 hours |
| 12,288Wh (with one extra battery) | ~8 hours | ~16 hours |
These are rough estimates before inverter losses (typically 10–15%). Your system's draw depends on its size, efficiency, the weather and your thermostat setting, so treat the table as a sense of scale.
More practical ways to stay cool
- Cool one room. A 5,000–8,000 BTU window unit uses a fraction of the power of central air. A 2kWh-class station can run one for many hours. See power stations for a window AC.
- Raise the thermostat. If you do run central AC, setting it a few degrees higher and pre-cooling the house before an expected outage reduces how often the compressor starts.
- Add solar. A large station with several panels can recharge during the day, which is exactly when AC runs most. See how many solar panels you need.
- Consider a generator or whole-home battery. For whole-house cooling through a long outage, see power station vs generator vs home battery.
Plan it out
The home backup planner totals your essential loads and shows which stations cover them. For a full list of 240V stations, browse the home backup class.