≈ 1.8 nights (8h/night) · Safe motor start buffer (95.9% margin).
CPAP machine running (65 W max) and start-up (90 W max) draw fit the EcoFlow RIVER 2 Pro's 800 W continuous / 1,600 W surge ratings.
humidifier and heated tube off (15 W)
standard pressure with humidifier active (40 W)
high pressure with HumidAir and heated tube at max (65 W)
Via ResMed Air11 90 W DC/DC Converter (part 39231)
Via ResMed Air11 90 W DC/DC Converter (part 39231)
Via ResMed Air11 90 W DC/DC Converter (part 39231)
≈ 1.8 nights (8h/night)
System standby power: 10W (18.8% of total draw)
Provides 4× BS 1363 (230V) (120V 60Hz).
Pure sine wave inverter output. Safe for sensitive medical electronics and variable-speed motors.
Inductive motor/compressor load with 1.6× starting surge (motor inrush) (95.9% worst-case surge margin).
Wall AC fast charge at up to 940W (55m to 80%, 70m to 100%).
Safe envelope verified: Starting surge (65W) remains comfortably below the 1600W surge trip line, with steady-state operation settling into the safe continuous zone at 40W.
About 14.4 hours on AC power, with the CPAP machine averaging 40 W (standard pressure with humidifier active (40 W)). The EcoFlow RIVER 2 Pro then draws about 53 W from its battery, including 10 W for the inverter itself. Best case: about 29 hours (humidifier and heated tube off (15 W)). Worst case: about 9.5 hours (high pressure with HumidAir and heated tube at max (65 W)). At 8 hours a night, that's about 1.8 nights.
Yes. Using the ResMed Air11 90 W DC/DC Converter (part 39231) on the EcoFlow RIVER 2 Pro's 12 V car socket, the CPAP machine runs about 19.7 hours instead of 14.4 hours on AC, 36% longer, because it skips the inverter's conversion loss and its 10 W idle draw. That's 2.5 nights instead of 1.8 nights.
That simple division gives 19.2 hours, but the EcoFlow RIVER 2 Pro's inverter draws about 10 W whenever its AC outlets are on. At this light load that's 19% of everything the battery supplies, and inverter conversion losses take a further share. The idle figure comes from EcoFlow.
On wall power: about 55 minutes to 80% and 70 minutes to full (EcoFlow figures). With its maximum 220 W of solar input connected, expect about 176 W in full sun, so a full recharge takes roughly 4.6 hours of full sun, about 1.2 days at 4 peak sun hours a day.
It can act as a backup supply: with the CPAP machine plugged into the EcoFlow RIVER 2 Pro and the EcoFlow RIVER 2 Pro plugged into the wall, it switches the CPAP machine to battery in about 30 ms when the grid fails (EcoFlow calls this EPS mode).
Statutory 30-day retail price announcements & rate revisions
Bord Gáis Energy winter rate adjustment: +1.60c/kWh Day, +0.90c/kWh Boost (2am–5am), and +€12.50/yr standing charge effective 20 Nov 2026.
Energia retail revision: +1.85c/kWh Day, +1.15c/kWh EV Boost (2am–6am), and +€14.20/yr standing charge effective 15 Nov 2026.
Dual Fuel Day Night: Day -4.64c/kWh, Night -3.25c/kWh (effective 2026-11-05)
Electricity Day Night: Day -4.64c/kWh, Night -3.25c/kWh (effective 2026-11-05)
SSE Airtricity statutory price cut: -1.25c/kWh Day, -0.65c/kWh Night, and -€8.40/yr standing charge effective 01 Oct 2026.
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