How long can the Zendure SuperBase V6400 run a CPAP machine?
17.1 dayswell beyond what you asked for
Formula: (6.4kWh × 0.85 inverter efficiency) ÷ 0.32 kWh/day = 17.1 days. At continuous 40 W draw (no duty cycle), about 5.7 days.
Appliance
CPAP machine · 40 W / 60 W surge
Battery (base)
6.4kWh · 3.8kW / 5kW 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.
17.1 days
Formula: (6438 Wh × 0.85) ÷ 0.32 kWh/day = 17.1 days. Continuous draw ≈ 5.7 days at full load.
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