SizingPlate
Power stations › Scenarios › CPAP overnight

What size power station do I need for a CPAP machine?

A CPAP is a small, steady load — the whole job is quietly delivering clean power all night without a generator running outside. Even a compact station covers a full night with the humidifier off.

The load

POWER PLATE2 LOADS · 8 H RUNTIME
Continuous draw
70 W
Startup surge
70 W
Energy for 8 h
659 Wh
Buy at least
750 Wh
Look for ≥750Wh capacity, ~70W continuous / 70W surge or better.

Field note: Turn off the heated humidifier and run the machine at altitude-adjusted pressure to cut draw by more than half — a compact station can then cover two or three nights. Always verify the number against your machine's own label, and for medical use keep a second charged battery on hand.

Right size: Midsize (≈1,000Wh) · 1,800W

Typical price $500-900 · e.g. EcoFlow Delta 2, Bluetti AC180, Jackery Explorer 1000 v2

A full-size refrigerator through a multi-hour outage, a CPAP for several nights, tools in short bursts. The popular sweet spot. Recharges fast and takes solar input, but still time-limited on heavy loads.

Runs this load ~11 h on a full charge.

See current prices on Amazon

One size up: Large (≈2,000Wh) · 2,400W

Typical price $1,200-1,900 · e.g. EcoFlow Delta 2 Max, Bluetti AC200L, Jackery Explorer 2000 Plus

A fridge plus several small loads for most of a day, a window AC in short stretches, longer off-grid stays. Heavy to carry but still one-person portable; the point where solar recharge really matters for multi-day use.

Runs this load ~22 h on a full charge.

See current prices on Amazon

Adjust for your setup

Different loads or runtime? Uncheck and re-check below and drag the runtime slider — the plate recomputes live.

POWER PLATE2 LOADS · 8 H RUNTIME
Continuous draw
70 W
Startup surge
70 W
Energy for 8 h
659 Wh
Buy at least
750 Wh
Look for ≥750Wh capacity, ~70W continuous / 70W surge or better.

Capacity includes inverter loss (~15%) and a usable-charge margin, so the station isn't run flat. A solar panel or vehicle charge extends runtime past this number.

8 h
Kitchen
Heating & cooling
Pumps & well
Electronics
Medical & safety
Lighting
Laundry
Household
Tools & outdoor
RV & camping

Power stations that fit

Right size: Midsize (≈1,000Wh) · 1,800W

Typical price $500-900 · e.g. EcoFlow Delta 2, Bluetti AC180, Jackery Explorer 1000 v2

A full-size refrigerator through a multi-hour outage, a CPAP for several nights, tools in short bursts. The popular sweet spot. Recharges fast and takes solar input, but still time-limited on heavy loads.

Runs this load ~11 h on a full charge.

See current prices on Amazon

One size up: Large (≈2,000Wh) · 2,400W

Typical price $1,200-1,900 · e.g. EcoFlow Delta 2 Max, Bluetti AC200L, Jackery Explorer 2000 Plus

A fridge plus several small loads for most of a day, a window AC in short stretches, longer off-grid stays. Heavy to carry but still one-person portable; the point where solar recharge really matters for multi-day use.

Runs this load ~22 h on a full charge.

See current prices on Amazon
This site earns commissions from qualifying purchases made through links to Amazon and other retailers, at no extra cost to you. Wattage figures are typical estimates — actual draw varies by model. Always verify against your appliance's nameplate, and consult a licensed electrician for any panel or hardwired connections.