How long can the Anker SOLIX F3800 run a Well pump (1 hp)?
21.8 hours
Formula: (3.8kWh × 0.85 inverter efficiency) ÷ 3.6 kWh/day = 21.8 hours. At continuous 1500 W draw (no duty cycle), about 2.2 hours.
What if you add a battery? The + Home Backup Kit config jumps to 7.7kWh — roughly 1.8 days on a Well pump (1 hp).
Appliance
Well pump (1 hp) · 1500 W / 4500 W surge · 240V
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.
21.8 hours
Formula: (3840 Wh × 0.85) ÷ 3.6 kWh/day = 21.8 hours. Continuous draw ≈ 2.2 hours at full load.
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