Majority of CPAP, APAP and BPAP machines operate on both DC and AC power.  In Australia and in most countries, the AC current is 200-240 volts, while in the United States; the AC current is 110 volts.  A 220-240 volt CPAP machine will not work at its optimum at a 110-volt AC current.

Battery-powered CPAP Machine

Most batteries operate on a 12-volt DC current.  For a CPAP machine to work on DC power, you will need an inverter to change the current from DC to AC before the current powers up the machine.  The down side of using an inverter is that it will consume half the battery life. It is a good thing that with most CPAP machine brands, there is no need to use an inverter to convert the current from DC to AC. Using a simple power cord to plug the CPAP into a cigarette lighter plug should do.  How will you know if your CPAP machine will work without an inverter?  On the side or at the back of the machine, there should be a DC power outlet with an opening in the center.

The best battery to use is deep-cycle marine type of battery. This is heavier than a standard battery as it provides power for a longer period.  A CPAP machine with a cycle of 10cm H2O powered by a deep-cycle marine battery will last for three nights before needing to recharge.

Portable battery packs are also available to power a CPAP machine with a cycle set of 10 cm for about 8 hours.  CPAP Victoria offers CPAP battery kits which include the necessary cables and battery. You should take note though that some CPAP machine brands require specific battery packs to operate.

Using CPAP machine Overseas

Will your CPAP machine operate in other countries? Of course!  More so if the particular country has the same AC current as your home country.  If not, you can always use a battery pack or a power converter. Take not thought that it is best to carry an adapter to plug your CPAP power cord into an outlet overseas. You can buy various adapter plugs to make sure that you can plug your CPAP machine into a different power outlet or socket.

Before you travel abroad, it is best to check the voltage and type of socket of your destination so you can buy the necessary adapter. It is best to bring spare parts such as filter, mask, tubing and headgear to avoid unnecessary inconvenience. Bring a battery pack and a spare if possible.

Before you pack your CPAP machine make sure there is no water in the humidifier. If the machine has to go through airport security e.g. X-ray, make sure you stay with the machine as security personnel are most likely to inspect it part by part.  It is best to tag your CPAP machine as a medical equipment to facilitate easier security check.  Carrying a medical card indicating you have obstructive sleep apnoea is a good idea.

If you need a CPAP machine part when abroad, you can always contact us at CPAP Victoria so we can take care of your needs.