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Bluetti AC70 sizing guide
A 1,000 W inverter and 768 Wh — handles a fridge and most kitchen bursts. 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 · 23 lb · 2× AC, USB-A/C, car.
What the AC70 runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~13 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~20 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~17 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~14 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~2.0 h |
| Space Heater (1500 W) | 1,500 W | too much | — |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~1.4 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | too much | — |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | too much | — |
| Microwave (1000 W cooking) | 1,200 W | too much | — |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~4.3 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | too much | — |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | too much | — |
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 AC70 covers
Common questions
What can the Bluetti AC70 run?
With 1,000 W of continuous output and a 2,000 W surge rating, the Bluetti AC70 runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, window ac (8,000 btu), and more. Its 768 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Bluetti AC70 run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Bluetti AC70's 768 Wh runs one for roughly 13 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.