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Bluetti AC240 sizing guide
IP65-rated, 2,400 W inverter — a job-site and storm unit that scales well past its base 1,536 Wh. Here's exactly what it runs, how long, and which outages it covers — computed, not marketed.
0-80% in 45 min AC (Turbo); expandable to 10,136 Wh with B210 batteries · 72 lb · 2× AC 120V/20A + 1× NEMA TT-30 · expandable with add-on batteries.
What the AC240 runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~26 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~39 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~35 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~29 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~3.9 h |
| Space Heater (1500 W) | 1,500 W | yes | ~0.9 h |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~2.8 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | yes | ~1.8 h |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | yes | ~3.5 h |
| Microwave (1000 W cooking) | 1,200 W | yes | ~1.2 h |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~8.6 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | yes | ~6.6 h |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | yes | ~9.2 h |
Runtime uses each load's duty-weighted average draw against 90% of the rated capacity — conservative on purpose. Cyclic loads (fridges, pumps) run far longer than running-watts × capacity would suggest.
Outages the AC240 covers
Common questions
What can the Bluetti AC240 run?
With 2,400 W of continuous output and a 3,600 W surge rating, the Bluetti AC240 runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, space heater (1500 w), and more. Its 1,536 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Bluetti AC240 run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Bluetti AC240's 1,536 Wh runs one for roughly 26 h before recharging.
Specs: Manufacturer published specifications (approximate; confirm on the current product page) (compiled 2026-08-10). 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.