Use case · Night 3

Best portable power stations for CPAP overnight

Overnight CPAP backup is a specs job: a pure sine wave AC inverter (or an approved DC cable from the CPAP maker), enough Wh for an 8-hour sleep window, and quiet enough for a bedroom. This page compares current stations on those numbers — not on clinical outcomes.

What matters for overnight CPAP power (specs only)

  • Pure sine wave AC. Mainstream EcoFlow / Anker / BLUETTI / Jackery stations use pure sine inverters. Modified-sine units are a poor match for many CPAP power supplies — stick to models that list pure sine on the spec sheet.
  • Wh buys hours. Draw is mostly blower + heaters. Public manufacturer test figures for a common ResMed AirSense 10 class machine are roughly ~7 W device-only, ~22 W with humidifier, and ~34 W with humidifier + heated tube (ResMed Air10 power-consumption data cited in public summaries). Your label and a plug-in watt meter win over any table.
  • Humidifier is the big lever. Heated humidifier / ClimateLine-style tube can roughly triple draw vs blower-only. Turning comfort heaters off stretches battery — a settings choice, not a therapy recommendation.
  • DC vs AC. Some CPAP makers sell a DC cable or converter that skips the inverter. That can cut losses. If you use the wall brick into an AC outlet, size Wh with ~15% inverter/idle overhead.
  • UPS switchover. Sub-20 ms UPS modes reduce the chance of a brief outage resetting the machine when the grid drops — still verify with your own setup.

Not medical advice. QuietWatt lists battery and inverter specs for shopping research. We do not recommend therapy settings, diagnose conditions, or guarantee any machine will run for a full night in your room. Confirm backup plans with your equipment supplier and the CPAP manufacturer’s documentation.

Comparison: pure sine models for overnight CPAP duty

Specs below are from manufacturer product pages (checked Oct 2026). Prices are approximate street / sale USD and change often — confirm on the linked official pages. Runtime columns are estimates using public watt-draw bands and ~85% usable Wh after inverter losses (see math below). They are not clinical guarantees.

Model Capacity / inverter AC output · UPS Est. overnight runtime (8 h sleep window) Bedroom notes Approx. price (USD)
EcoFlow RIVER 3 Plus Compact 286 Wh
expandable to 858 Wh
Pure sine class (EcoFlow AC inverter)		 600 W (X-Boost 1,200 W)
UPS <10 ms		 Est. usable ~243 Wh.
~7–10 W band: multi-night margin.
~22 W humidifier: ~one full night.
~34–40 W humidifier+tube: marginal — size up or reduce heaters. 		<30 dB · ~10.4 lb · closet / nightstand friendly ~$180–300
Anker SOLIX C1000 Balanced 1,056 Wh
expandable to 2,112 Wh
1,800 W pure sine wave (Anker spec)		 1,800 W / 2,400 W surge
UPS <20 ms		 Est. usable ~898 Wh.
~22 W: multi-night.
~40 W comfort-on: ~20+ h — comfortable overnight buffer. 		~28.4 lb · car outlet available for maker DC cables where supported ~$400–600
BLUETTI Elite 100 V2 Quiet 1,024 Wh
Pure sine-wave inverter (BLUETTI)		 1,800 W (lifting 2,700 W)
UPS ≤10 ms		 Est. usable ~870 Wh.
Similar overnight class to C1000 / Jackery 1000 v2.
BLUETTI product copy lists CPAP among sensitive-device examples — still verify your own watt draw. 		~30 dB light load · ~25 lb · strong bedroom fit ~$380–500
Jackery Explorer 1000 v2 Light 1,070 Wh
Pure sine wave AC (Jackery FAQ / AU product copy)		 1,500 W / 3,000 W surge peak
UPS <20 ms		 Est. usable ~910 Wh.
~22 W: multi-night.
~40 W: ~20+ h overnight class. 		Fan ≤22 dB (maker) · ~23.8 lb — lightest ~1 kWh option here ~$499–589
EcoFlow DELTA 3 Plus Expandable 1,024 Wh
expandable toward ~5 kWh
Pure sine class (EcoFlow AC inverter)		 1,800 W / 3,600 W surge
UPS <10 ms		 Est. usable ~870 Wh solo — same overnight class as peers.
Add extra battery when you want multi-night margin with heaters on. 		<30 dB @ ~600 W · ~27.6 lb ~$600–900+ (sales vary)
BLUETTI AC200L Multi-night 2,048 Wh
Pure sine wave (BLUETTI / third-party confirmations of clean AC)		 2,400 W / 3,600 W lifting · 4,800 W surge (US page)
heavier UPS-class unit		 Est. usable ~1,740 Wh.
~22 W: many nights.
~40 W comfort-on: multi-night buffer without an extra pack. 		~62 lb — floor spot, not a nightstand · ≤50 dB max (maker) ~$800–1,100

QuietWatt is independent. We do not sell these products. Specs and prices can change — always verify on the official product URL before buying. Pure sine claims above are taken from manufacturer pages or official FAQ wording where available.

Overnight Wh estimates (label: estimates)

Rough math: usable Wh ≈ rated Wh × 0.85 (AC inverter + idle). Divide by average CPAP watts over the sleep window. Figures use public bands (~7–10 W device-only, ~22 W humidifier, ~34–44 W humidifier + heated tube from ResMed Air10-class test summaries). Real draw varies with pressure setting, leak, room temperature, and heater duty cycle — measure yours.

Device-only (~7–10 W)

~1 night → many nights

286 Wh ≈ 20–30 h · 1,024 Wh ≈ 85–120 h (estimates)

Humidifier on (~22 W)

~11–40 h

286 Wh ≈ ~11 h · 1,024 Wh ≈ ~39 h · 2,048 Wh ≈ ~79 h (estimates)

Humidifier + heated tube (~34–44 W)

~5–45 h

286 Wh ≈ 5–7 h (tight) · 1,024 Wh ≈ 20–25 h · 2,048 Wh ≈ 40–45 h (estimates)

These are estimates from manufacturer/public watt data, not lab guarantees and not medical guidance. If overnight continuity matters to you, prefer the 1 kWh class (or larger) when comfort heaters stay on, and test a full night at home before you need it.

Where to buy (affiliate placeholders)

Tracked affiliate links will replace these placeholders once QuietWatt is enrolled in each program. Until then, use the official product URLs in the table above.

Buy via EcoFlow Buy via BLUETTI Buy via Anker Buy via Amazon

Placeholder anchors: #aff-ecoflow, #aff-bluetti, #aff-anker, #aff-amazon — documented in README.

Sources