How long can the EcoFlow DELTA Pro Ultra run a Oxygen concentrator?
14.9 hours
Formula: (6.1kWh × 0.85 inverter efficiency) ÷ 8.4 kWh/day = 14.9 hours. At continuous 350 W draw (no duty cycle), about 14.9 hours.
What if you add a battery? The + Extra Battery config jumps to 12.3kWh — roughly 1.2 days on a Oxygen concentrator.
Appliance
Oxygen concentrator · 350 W / 600 W surge
Battery (base)
6.1kWh · 7.2kW / 10.8kW 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.
14.9 hours
Formula: (6144 Wh × 0.85) ÷ 8.4 kWh/day = 14.9 hours. Continuous draw ≈ 14.9 hours at full load.
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