How long can the Bluetti AC300 + B300K run a Refrigerator?
1.9 days
Formula: (2.8kWh × 0.85 inverter efficiency) ÷ 1.26 kWh/day = 1.9 days. At continuous 150 W draw (no duty cycle), about 15.7 hours.
What if you add a battery? The AC300 + 2× B300K config jumps to 5.5kWh — roughly 3.7 days on a Refrigerator.
Appliance
Refrigerator · 150 W / 800 W surge
Battery (base)
2.8kWh · 3kW / 6kW 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.
1.9 days
Formula: (2765 Wh × 0.85) ÷ 1.26 kWh/day = 1.9 days. Continuous draw ≈ 15.7 hours at full load.
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