What Size Power Station Runs a CPAP Overnight?
A 500–800Wh portable power station runs a 30–60W CPAP machine for a full 8-hour night with capacity to spare — by the runtime formula (Capacity ÷ Wattage × 0.85), even a worst-case 60W draw needs only about 565Wh for eight hours, so a 768Wh unit like the Bluetti AC70 covers any CPAP in that range.
Prices change frequently on Amazon and are not shown here per Amazon Associates policy — use the button below for current pricing.
Check 768Wh power stations on Amazon →
The math, worked out
A CPAP machine draws 30–60W (see the common device wattages table on our main guide). This site's runtime formula is:
Runtime (hours) = Capacity (Wh) ÷ Device Wattage × 0.85 (the 0.85 covers inverter efficiency loss).
Flip it around to size a battery for an 8-hour night:
- Light draw (30W): 30 × 8 ÷ 0.85 ≈ 282Wh needed
- Midpoint draw (45W): 45 × 8 ÷ 0.85 ≈ 424Wh needed
- Worst case (60W): 60 × 8 ÷ 0.85 ≈ 565Wh needed
That is why the 500–1,000Wh class is the CPAP sweet spot: small enough to carry to a campsite, big enough that even the hungriest CPAP in the range clears a full night.
Overnight runtimes by capacity (45W midpoint draw)
| Unit | Capacity | Runtime at 45W |
|---|---|---|
| Bluetti AC70 | 768Wh | ≈ 14.5 hours |
| Jackery Explorer 1000 v2 | 1,070Wh | ≈ 20.2 hours |
| EcoFlow DELTA 2 Max | 2,048Wh | ≈ 38.7 hours |
All three use LiFePO4 (LFP) batteries rated for 3,000+ charge cycles, and all support solar recharging for multi-night off-grid use.
Check the Bluetti AC70 on Amazon →
Related reading
- Best Portable Power Stations 2026 — the full ranked guide with the interactive load-meter calculator.
- Best Portable Power Station for Camping — lightweight, solar-ready picks.
- Can a Power Station Run a Refrigerator During an Outage? — the same math applied to fridges.
- The Power Station Numbers Table — advertised vs usable Wh and runtime reference data.
Frequently Asked Questions
A 500–800Wh portable power station runs a 30–60W CPAP machine for a full 8-hour night with room to spare. Using the runtime formula Capacity (Wh) ÷ Wattage × 0.85, even a worst-case 60W draw needs about 565Wh for eight hours, so a 768Wh unit like the Bluetti AC70 covers a full night at any draw in the 30–60W range.
At the 45W midpoint of the 30–60W CPAP range, a 768Wh unit like the Bluetti AC70 runs about 14.5 hours (768 ÷ 45 × 0.85). At a worst-case 60W it runs about 10.8 hours, and at a light 30W draw about 21.7 hours — one to two full nights per charge.
The 0.85 factor accounts for efficiency loss: converting the battery's DC power to AC through the inverter consumes some energy, so you never get 100% of the rated watt-hours to your device. This site's runtime formula — Capacity (Wh) ÷ Device Wattage × 0.85 — bakes that loss in.
Yes. A smartphone charger draws 20–30W, so a combined CPAP-plus-phone load of roughly 50–90W still leaves a 768Wh unit running about 7.2 to 13 hours — enough for a full night even at the high end of the combined draw.
For multi-night trips without recharging, step up in capacity: a 1,070Wh unit like the Jackery Explorer 1000 v2 runs a 45W CPAP about 20 hours (roughly two nights), and a 2,048Wh unit like the EcoFlow DELTA 2 Max about 38 hours (four-plus nights). Pairing any of them with a solar panel extends that indefinitely — a full solar charge typically takes 3–8 hours depending on panel size and sunlight.