How long can the Anker SOLIX F3800 run a Window AC (8,000 BTU)?
7.6 hours
Formula: (3.8kWh × 0.85 inverter efficiency) ÷ 10.3 kWh/day = 7.6 hours. At continuous 715 W draw (no duty cycle), about 4.6 hours.
What if you add a battery? The + Home Backup Kit config jumps to 7.7kWh — roughly 15.2 hours on a Window AC (8,000 BTU).
Appliance
Window AC (8,000 BTU) · 715 W / 1800 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.
7.6 hours
Formula: (3840 Wh × 0.85) ÷ 10.3 kWh/day = 7.6 hours. Continuous draw ≈ 4.6 hours at full load.
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