How long can the EcoFlow DELTA Pro 3 run a Chest freezer?
4 dayswell beyond what you asked for
Formula: (4.1kWh × 0.85 inverter efficiency) ÷ 0.86 kWh/day = 4 days. At continuous 120 W draw (no duty cycle), about 1.2 days.
What if you add a battery? The + Extra Battery config jumps to 8.2kWh — roughly 8.1 days on a Chest freezer.
Appliance
Chest freezer · 120 W / 600 W surge
Battery (base)
4.1kWh · 4kW / 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.
4 days
Formula: (4096 Wh × 0.85) ÷ 0.86 kWh/day = 4 days. Continuous draw ≈ 1.2 days at full load.
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