How long can the Goal Zero Yeti Pro 4000 run a Window AC (8,000 BTU)?
7.9 hours
Formula: (4kWh × 0.85 inverter efficiency) ÷ 10.3 kWh/day = 7.9 hours. At continuous 715 W draw (no duty cycle), about 4.7 hours.
Appliance
Window AC (8,000 BTU) · 715 W / 1800 W surge
Battery (base)
4kWh · 3.6kW / 7.2kW surge
Runtime Quick-Check
Runtime Quick-Check
Pick a battery and an appliance — see days of runtime after the 0.85 inverter derate.
7.9 hours
Formula: (3993 Wh × 0.85) ÷ 10.3 kWh/day = 7.9 hours. Continuous draw ≈ 4.7 hours at full load.
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