How long can the Anker SOLIX F3800 run a Sump pump?
1.1 days
Formula: (3.8kWh × 0.85 inverter efficiency) ÷ 2.88 kWh/day = 1.1 days. At continuous 800 W draw (no duty cycle), about 4.1 hours.
What if you add a battery? The + Home Backup Kit config jumps to 7.7kWh — roughly 2.3 days on a Sump pump.
Appliance
Sump pump · 800 W / 2000 W surge
Battery (base)
3.8kWh · 6kW / 9kW 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.
1.1 days
Formula: (3840 Wh × 0.85) ÷ 2.88 kWh/day = 1.1 days. Continuous draw ≈ 4.1 hours at full load.
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