Inverter question

I am going to install an inverter in my 180 mostly to power my cpap machine.  My question is, do I need to spend the money for a true sinewave , or will a modified sinewave work?

Charlie is, of course, correct. I've been using my CPAP (two different machines) for a number of years on 12 volt. My latest model: A ResMed AirSense 10 works great with 12 volt adapter and sips amps without running humidifier. I found that filling the water chamber with warm distilled water right before bedtime is almost as good as running humidifier all night. It is also very quiet except when Henry (the camping cat) tries to pull it off of me in the morning when he wants breakfast - he really does.

Originally posted by jwb My cpap has an output of 80 watts,  6.67a at 12 volts. looks like I just need a 12v adapter/cord. thanx

Sounds like mine. The wattage listing is for running with the humidifier. If you don't run the humidifier, the actual power draw is much less. I just looked at mine, and the 80 watts is if you are using the heated tubing. 60 watts is for when you are using non-heated tubing. If you have a problem with "rain out" like i did, get a cover for the tubing. My wife made me a cover out of fleece fabric. It is essentially a tube with elastic on each end that will fit over the tubing and rubber ends. The elastic holds it in place. Just having that layer of fabric prevents the condensation in the tube. Before she did that for me, I was getting a nose full of water from the condensation. Now, I have no problems. These can be bought, but I have spent thousands of dollars on sewing equipment for my wife. We might as well get some use out of it.

Hi Fred,