CPAP through an outage on a solar generator

The machine on the nightstand has to keep breathing after the streetlights die. The useful question is nights per kilowatt-hour—ResMed’s printed watts, eight hours of sleep, and a tank you can read in the morning. Prefer the maker-approved DC cord when a station port matches. Planning math on a plate, not a clinic night on a stopwatch.

Bedroom sleep power only on this page. Hub map: solar generators. Add other loads on the load calculator (CPAP row defaults to ~50 W). House-night shopping: solar generator for home backup. Fridge hours: fridge runtime. Wet basement: sump pump runtime.

Nights first

Not medical advice. This desk sizes house nights from printed watts and a calculator default. It is not a prescription, not a clinical backup plan, and not a claim that any portable power station is a medical UPS or life-support device. Test your own setup on a calm night before you rely on it when the grid is down. Follow the device maker—cord, voltage, and what they allow—over anything written here.

Plan on about 400 Wh for one eight-hour sleep at the load calculator’s ~50 W planning default—near ResMed’s AirSense 10 printed typical 53 W (printed peak 104 W on a 90 W supply, device with humidifier). That 50 W figure is the planning watts for the simple nights math below, not a clamp-meter average from a bedroom here. Leave humidifier and heated hose on and raise planning watts toward the 70–90 W peak-shaped / supply-envelope band; overnight average draw is often lower than that envelope, but nights claims on this page err conservative and prefer the higher planning watts. At 80 W planning, the same eight hours cost 640 Wh. Roughly 2.5 nights per usable kilowatt-hour at 50 W planning, or about four to five nights alone on a 2,048 Wh tank at 90 percent usable (~1,843 Wh); at 80 W planning the same tank covers closer to three nights. Use the maker-approved DC / 12 V cord when it matches a station port and you skip the inverter tax the AC path pays—do not substitute a third-party DC cord the maker did not approve. Add a fridge, a router, or lamps and the nights shrink—that is what the calculator is for. Station continuous ratings below come from the makers’ US pages (2,400 W BLUETTI and Anker, 3,000 W Jackery), checked September 9, 2026. Those CPAP watts are manufacturer print and planning defaults—not a night timed here.

What the maker print actually says

Peak versus average versus planning. ResMed prints typical 53 W and peak 104 W for the AirSense 10 with humidifier, on a 90 W power supply. The load calculator defaults to about 50 W planning with night duty at about 33 percent of a 24-hour day (~8 hours)—same ballpark as the printed typical, rounded for the form, not a clamp-meter reading. The 70–90 W humidified+hose band is a peak-shaped / supply-envelope planning range inside that 90 W supply and 104 W peak print; overnight average is often lower. Runtime math must say which figure it uses. For “how many nights” claims, this page prefers the higher planning watts so the morning percent is not a surprise. Write your own nameplate or the maker’s DC cord rating down if you have one.

Dry versus humidified. Without humidifier and heated hose, heating elements stay off and the night sits low in the maker envelope—dial the calculator below 50 W only if your plate prints lower. With HumidAir and ClimateLine-style tubing on, raise planning toward 70–90 W inside the 90 W supply / 104 W peak print. Those bounds are the maker’s, not a forum plate.

DC-direct versus the inverter path. Ask the device maker which cord is approved. A matching maker-approved 12 V / DC path skips turning battery DC into 120 V AC and back again, so you avoid inverter idle and conversion loss the AC brick path pays. The AC brick works when it is the only cord you have. Do not recommend or buy a third-party DC cord the maker did not approve—wrong voltage or a forbidden adapter is not a clever hack on therapy night. Spec sheets print the ports; they do not print your overnight Wh. Plan a margin either way.

What shortens the morning percent

• Comfort heat left on. Humidifier plus heated hose climb toward the 90 W supply envelope. One dry night can buy another morning of therapy on the same tank.
• The kitchen fridge on the same cord. Closed-door fridge math lives on fridge runtime. Sleep plus fridge is still a quiet plan; a space heater is not.
• AC-only when a maker-approved DC cord exists. The same machine can look thirstier on the inverter than on a matching 12 V port. Skip third-party DC cords.
• Starting the night on a half tank. LiFePO4 likes a margin. Do not plan on 100 percent of nameplate.
• Counting every printed Wh as usable. Leave about ten percent on LiFePO4 so the morning is not a cliff.
• Sizing nights on average while the hose heats to peak. If comfort heat is on, use the higher planning band for nights math, not the hopeful overnight average.

Bedroom setup, not theater

Tape the cord where bare feet will not find it. Set the station where you can read the display without climbing over the mattress. If the maker approved a DC cord and the port matches, use that cord before you reach for the AC brick. In the morning, check the percent with coffee—not at 2 a.m. with a flashlight—and decide whether tomorrow needs dry mode or a second pack. Run one practice night on grid-up days so you know the morning percent before an outage forces the lesson. That is the whole ritual; nobody here slept next to your machine to invent a different one.

Tanks that fit this sleep math

Partner hops below go to merchant catalog pages. We are not earning commissions from those brands today.

Full SKU notes already exist. This is only the CPAP fork of the same ~2 kWh 120-volt class. EcoFlow stays comparison-only on Jackery vs EcoFlow—no EcoFlow shop hop here.

• BLUETTI AC200L — Fit fence: multi-night sleep with room to add packs, still on 120 V—skip if you need a sub-45 lb bedroom carry. Spec: 2,048 Wh / 2,400 W continuous, 62.4 lb. Price: $899 on shop.bluettipower.com, checked September 9, 2026. Main bluettipower.com product page lists Discontinued / unavailable; shop is the live list price. Grow path: extra batteries (printed to 8,192 Wh). Check today’s AC200L price at BLUETTI.
• Anker SOLIX C2000 Gen 2 — Fit fence: same tank class you can carry to the bedroom without a cart—skip if you need printed expansion past about 4 kWh. Spec: 2,048 Wh, 2,400 W continuous, 4,000 W peak printed, 41.7 lb. Price: $999.99 that day ($50 off $999.99) on the Anker SOLIX store, not Anker.com retail. Check today’s C2000 Gen 2 price at Anker SOLIX.
• Jackery Explorer 2000 Plus — Fit fence: 3,000 W continuous is more headroom than a CPAP alone needs; useful if the same tank also starts a fridge or another surge load on a different night. Spec: 2,042.8 Wh, 3,000 W continuous, 61.5 lb. Featured buy: new Explorer 2000 Plus + SolarSaga 100W mini ×2 kit at $1,219 on jackery.com, checked September 23, 2026 (standalone SKU removed from the PDP). See Explorer 2000 Plus at Jackery.

Prices checked September 9, 2026. Family comparison: Jackery vs BLUETTI vs Anker SOLIX. Shopping decision: solar generator for home backup.

When this is the wrong tool

• The device maker forbids third-party DC cords, or the port voltage does not match. Follow the maker, not a blog. Maker-approved DC only; no third-party DC cords from this desk.
• You need medical advice, a medical UPS claim, hospital-grade transfer, or life-support continuity. Station makers themselves often say portable power stations are not for medical or life-support gear where an interruption means harm. This page is not medical advice and does not claim any station is a medical UPS. Test your own setup before you rely on it on an outage night.
• The must-list also includes 240-volt loads. Extra 120-volt packs never grow that leg: F3800 or a standby generator.

Pencil and shopping page: load calculator · solar generator for home backup. Partner hops above are brand-root until deep links land. Disclosure.

Hub: solar generators · shopping: solar generator for home backup · pencil: load calculator · fridge: fridge runtime · sump: sump pump runtime · extra packs: extra batteries.