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Bluetti AC180 sizing guide
A 1.15 kWh / 1,800 W unit that undercuts the 1 kWh class on price — strong outage value. Here's exactly what it runs, how long, and which outages it covers — computed, not marketed.
~45 min to 80% AC; up to 500 W solar · 35 lb · 4× AC, USB-A/C, car.
What the AC180 runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~20 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~30 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~26 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~22 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~3.0 h |
| Space Heater (1500 W) | 1,500 W | yes | ~0.7 h |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~2.1 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | yes | ~1.3 h |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | yes | ~2.6 h |
| Microwave (1000 W cooking) | 1,200 W | yes | ~0.9 h |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~6.5 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | yes | ~4.9 h |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | yes | ~6.9 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 AC180 covers
Common questions
What can the Bluetti AC180 run?
With 1,800 W of continuous output and a 2,700 W surge rating, the Bluetti AC180 runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, space heater (1500 w), and more. Its 1,152 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Bluetti AC180 run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Bluetti AC180's 1,152 Wh runs one for roughly 20 h before recharging.
Specs: Manufacturer published specifications (approximate; confirm on the current product page) (compiled 2026-06-15). 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.