What size generator do I need for central ac?
Check, uncheck or adjust the typical device list below — watts, startup surge and battery size update instantly. Numbers come from U.S. DOE, ENERGY STAR and manufacturer spec sheets, not marketing copy.
1. Check what you need to power
Refrigeration & Freezers
Kitchen
Heating, Cooling & Fans
- 1
- 1
Water & Pumps
Laundry & Cleaning
Electronics & Office
Medical Devices
Power Tools & Outdoor
Lighting
2. Your sizing
⚠️ Your selection includes 240V equipment (submersible pump / central AC / dryer) — you need a split-phase (120/240V) station or a transfer switch setup. Verify nameplate watts and starting amps before buying; consult a licensed electrician for fixed wiring.
Assumptions: daily hours per device follow DOE / ENERGY STAR duty cycles; capacity adds a 25% margin. Check your appliance nameplates — actual draw varies by model.
3. Best matches from our 6-brand database
No portable station in our database covers this load. This is expandable-system or fixed home-battery territory — check current models from EcoFlow, Anker SOLIX and Bluetti for expansion ceilings, or consider a standby generator.
Static answer (crawlable summary)
Typical device list: Central AC (2-ton, 24,000 BTU)×1, Furnace Fan (1/2 HP blower)×1.
Estimated from: Mfr spec: Goodman GSX14 (SS-GSX14) · VT Extension table (DOE-derived)
| Continuous load | 2,680 W |
|---|---|
| Startup peak | 9,490 W (driven by 1× Central AC (2-ton, 24,000 BTU)) |
| Daily energy use | 18,440 Wh |
| Recommended capacity | 23,050 Wh (25% margin included) |
| Minimum inverter | 2,950 W continuous |
⚡ A soft-start kit may be the cheapest upgrade here
This scenario's startup peak is driven by a conventional compressor's locked-rotor start. A soft-start kit cuts that peak by a documented 50–70%, which can turn "nothing fits" into "several stations fit" — see the soft-start calculator for the exact numbers against our station database.
Frequently asked questions
What size generator do I need for central ac?
For a typical setup (Central AC (2-ton, 24,000 BTU) and Furnace Fan (1/2 HP blower)), you need at least 2,680W of continuous power. The single biggest moment is startup: when 1× central ac (2-ton, 24,000 btu) kicks on, the momentary draw peaks at 9,490W. For a full day of runtime we recommend at least 23,050Wh of battery capacity (your devices use about 18,440Wh per day, plus a 25% margin for a full day of use).
Which power stations can handle this?
No single portable station covers this load — this is expandable-system or fixed home-battery territory. Look for a surge rating above 9,490W and at least 23,050Wh.
Why is the startup surge higher than the running watts?
Motor-driven devices (fridge compressors, well pumps, air conditioners) draw 2-5× their running power for a split second at startup — measured as locked-rotor amps (LRA). On this page the biggest spike comes from the Central AC (2-ton, 24,000 BTU): a station that only meets the running load will trip or stall when it starts. Data sources: U.S. DOE Energy Saver, ENERGY STAR certified products, manufacturer spec sheets.