How long can the Bluetti AC300 + B300K run a Sump pump?
19.6 hours
Formula: (2.8kWh × 0.85 inverter efficiency) ÷ 2.88 kWh/day = 19.6 hours. At continuous 800 W draw (no duty cycle), about 2.9 hours.
What if you add a battery? The AC300 + 2× B300K config jumps to 5.5kWh — roughly 1.6 days on a Sump pump.
Appliance
Sump pump · 800 W / 2000 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.
19.6 hours
Formula: (2765 Wh × 0.85) ÷ 2.88 kWh/day = 19.6 hours. Continuous draw ≈ 2.9 hours at full load.
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