You need about 2,222 Wh — and 7 units fit. The smallest sufficient is the Jackery Explorer 3000 Pro; we never push more capacity than your load can use. Surge to clear: 1,250 W.
The math
Running watts (everything on at once) = 715 W
Surge watts (worst single startup + the rest running) = 1,250 W
Average draw (cyclic loads counted by their duty cycle) = 500 W
Watt-hours = 500 W × 4.0 h ÷ 90% usable reserve = 2,222 Wh
1
Jackery Explorer 3000 Prosmallest that fits
3,024 Wh3,000 W cont · 6,000 W surge~5.4 h on this load$$$
Three kilowatt-hours for multi-day outages and heavier loads, on wheels.
🔗 The "Check price" buttons are brand-direct affiliate links. Once our brand affiliate programs are approved these will earn a commission — at no extra cost to you, and it never changes which unit we recommend. Disclosure.
Can a specific unit run a window ac (8,000 btu)?
25 of the units we track deliver enough watts to run a window ac (8,000 btu). Check a specific one for the runtime and the full verdict:
What size power station do I need to run a window ac (8,000 btu)?
A window ac (8,000 btu) draws about 715 W running, with a startup surge near 1,250 W. So you want a unit with at least 715 W continuous output and 1,250 W+ surge. For 4.0 h of runtime that's roughly 2,222 Wh of capacity — the Jackery Explorer 3000 Pro is the smallest unit that clears all of it.
How many watts does a window ac (8,000 btu) use?
About 715 W while running, spiking to roughly 1,250 W on startup. It only draws power about 70% of the time, so over an outage its energy use is well below 715 W × the hours — which is why a modest battery lasts longer than you'd expect.
Sources: Window AC (8,000 BTU) wattage — Standard appliance-wattage / generator-sizing charts (representative values; verify your nameplate); station specs — manufacturer published specifications (compiled 2026-06-15; approximate). Informational only — a computed sizing estimate from published appliance-wattage charts and manufacturer station specs. It is not an electrical guarantee. For hardwired or whole-home backup, transfer switches, or any permanent install, consult a licensed electrician.