How long can the Tesla Powerwall 3 run a Central AC (3 ton)?
6.6 hours
Formula: (13.5kWh × 0.85 inverter efficiency) ÷ 42 kWh/day = 6.6 hours. At continuous 3500 W draw (no duty cycle), about 3.3 hours.
Appliance
Central AC (3 ton) · 3500 W / 8000 W surge · 240V
Battery (base)
13.5kWh · 11.5kW / 11.5kW surge
Runtime Quick-Check
Runtime Quick-Check
Pick a battery and an appliance — see days of runtime after the 0.85 inverter derate.
6.6 hours
Formula: (13500 Wh × 0.85) ÷ 42 kWh/day = 6.6 hours. Continuous draw ≈ 3.3 hours at full load.
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