How long can the Bluetti AC500 + B300S run a Refrigerator?
2.1 days
Formula: (3.1kWh × 0.85 inverter efficiency) ÷ 1.26 kWh/day = 2.1 days. At continuous 150 W draw (no duty cycle), about 17.4 hours.
What if you add a battery? The AC500 + 2× B300S config jumps to 6.1kWh — roughly 4.1 days on a Refrigerator.
Appliance
Refrigerator · 150 W / 800 W surge
Battery (base)
3.1kWh · 5kW / 10kW surge
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Runtime Quick-Check
Runtime Quick-Check
Pick a battery and an appliance — see days of runtime after the 0.85 inverter derate.
2.1 days
Formula: (3072 Wh × 0.85) ÷ 1.26 kWh/day = 2.1 days. Continuous draw ≈ 17.4 hours at full load.
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