How much does a CPAP add to your electric bill, and what happens in a blackout?
The real wattage, the honest bill impact, and how to keep therapy running through a brownout.
A CPAP machine typically draws roughly 30 to 60 watts while running, so for most households it adds only a small, low range to a monthly electric bill, more with a heated humidifier running. During a power outage, a CPAP will not run without power unless it is connected to a battery or inverter backup.
How much electricity does a CPAP actually use?
A CPAP or BiPAP machine is a low-power device compared to most home appliances. Most units draw somewhere in the range of 30 to 60 watts while running, and a heated humidifier, if you use one, adds a bit more on top of that. Run the rough math yourself: a machine running at roughly 40 to 60 watts for about 8 hours a night uses somewhere around 0.3 to 0.5 kilowatt-hours per night, which over a full month lands in a modest, low range added to your bill. This is only an estimate to help you picture the range, not a quoted figure, since your machine's actual draw and your utility's rate both change the number.
For context, that is far less than a rice cooker, an aircon unit, or even a laptop charger left plugged in all day. If a family is worried CPAP will meaningfully spike their electric bill, the honest answer is: for most people, it will not.
Can I use CPAP during a power outage or brownout?
A standard CPAP or BiPAP machine plugs into the wall and will not run without electricity, the same as any other plugged-in appliance. Brownouts are a real and common concern in many parts of the Philippines, so this is a fair question to plan around, not to worry about silently.
There are two practical ways to keep using your machine during an outage:
- A portable power station or battery pack. Many households pair their CPAP with a portable power station (the kind also used for laptops, fans, or emergency lighting) sized to the machine's wattage. Because CPAP draws relatively little power, a mid-sized power station can often run a machine for several hours on a single charge, though the exact runtime depends on the unit's capacity and your machine's actual draw.
- A home inverter or UPS setup. If your household already has an inverter or uninterruptible power supply for outages, a CPAP machine (without a heated humidifier, which draws more) is usually light enough to run on it comfortably alongside other essentials.
Before buying any backup power option, check your specific machine's wattage rating (usually printed on the device or in its manual) and match it against the power station or inverter's rated output, since running an underpowered unit can cause the machine to shut off mid-night.
What we recommend if brownouts are a real concern in your area
If you live somewhere with frequent scheduled or unscheduled outages, mention it when you book your home setup. Your RT can talk through backup power options that fit your specific machine and household, so an outage does not mean a night without therapy.
Frequently asked questions
Most CPAP machines draw roughly 30 to 60 watts while running, which for most households adds only a small, low range to a monthly bill. A heated humidifier adds a bit more. Your exact cost depends on your machine, your usage, and your electricity rate.
Not without a backup power source. A standard CPAP plugs into the wall and needs electricity to run, the same as any other appliance. A portable power station or home inverter/UPS sized to your machine's wattage lets you keep using it during a brownout.
Check your machine's wattage rating (usually printed on the unit or in the manual), then choose a power station or inverter rated to comfortably cover that draw for as many hours as you need. Since CPAP uses relatively little power compared to most appliances, even a mid-sized power station can often run one for several hours.
It uses more than the CPAP motor alone, though still modest compared to most household appliances. If you are planning battery backup for an outage, running without the humidifier for those hours will extend your runtime.
For most households, no. It is a low-power device, and the added cost is small next to appliances like an aircon or a rice cooker. The bigger practical question for most Filipino households is backup power during outages, not the everyday electric bill.
Yes, a CPAP without battery backup stops running as soon as power to the outlet is cut, the same as any other electric device. This is why a power station or inverter is worth planning for if outages are common where you live.