How long can the Bluetti AC300 + B300K run a Chest freezer?
2.7 days
Formula: (2.8kWh × 0.85 inverter efficiency) ÷ 0.86 kWh/day = 2.7 days. At continuous 120 W draw (no duty cycle), about 19.6 hours.
What if you add a battery? The AC300 + 2× B300K config jumps to 5.5kWh — roughly 5.5 days on a Chest freezer.
Appliance
Chest freezer · 120 W / 600 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.
2.7 days
Formula: (2765 Wh × 0.85) ÷ 0.86 kWh/day = 2.7 days. Continuous draw ≈ 19.6 hours at full load.
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