Need help with CPAP for camper

Using a true Sinewave inverter with the CPAP is highly recommended. The one you purchased isn't.

Placing the inverter near the battery source and running a 110v extension cord to the CPAP is more effective then running a long 12 volt line or using a 12 v outlet in the camper. Also, it gets the inverter out of the sleeping area.

If inverter or battery capacity is an issue, shutting off the heat on the humidifier helps a lot. You can still use water in the humidifier with no heat.

I think my HMO insurance approves replacements at 5 years. Or, if I think it is a problem and I really, really twist their arms......

I think that CPAP machines are on a 5 year replacement schedule. (Medicare)

I also have the $$$$ Respironics battery pack, although with my new CPAP machine the power cord has a different end fitting, which I discovered at a CG in Glacier NP during a snow storm. I needed to use my 1000 watt inverter for power, which worked fine.

I use a Respironics that runs on 120V or 12V.

I bought a battery pack from Powerstream. This allows me to run it straight from the battery pack. An optional $25 12V cord (made by Respironics) is required. This battery pack costs much less than those targeted towards CPAP use. Mine works fine. Get one with the bigger battery (20-22 AH).

It includes a 120V charger that I use to recharge the battery and runs from an inverter in the truck when driving around.

You might be able to get by with a larger inverter.

I don't use the humidifier, so my experience is probably different. Also, my coach has an inverter that supplies 120 volt power from four house batteries, so that isn't an issue. The battery backup system from the manufacturer was something over $300.

At home I made a battery backup in case the power went out, especially at night when I probably wouldn't be aware of it. I used a tractor battery from Costco, about $65, and an automatic 3 amp battery tender supplying the battery with replacement power. I leave it connected all the time.

I'm on my third CPAP machine and all of them worked on 12 volt power, abet with a transformer in the power line to drop voltage from 120 to 12. So, I just bought a power plug from an electronics store (negative on the outside, positive on the inside) and wired it up.

I'm not sure what the replacement schedule is for CPAP machines as I could never get a straight answer from anybody. But, I found if I complained that my machine wasn't working like I thought it should, it got replaced. All of my machines have had a recording device built in and the results could be downloaded by the provider.

Could you use a jump box similar to this?

I'm not sure how long it would last, though, especially if you use a humidifier.

Battery packs specific to CPAPs can get pretty pricey.

I use a 12v DC /120v AC CPAP machine. Are you using the humidifier? I don't usually use that function when on battery power.

I'm not sure why your inverter operates that way?

Can you possibly trade it back to the medical supply you got it from? Mine plugs into 110 but has an inline 12v converter. So, if I don't have 110 available, I can plug into the 12v system with the same power cord I use for the TV. It's a Resperonics System One. Good Luck.

My wife has a C PAP and our twin deep cycles will not power it through a 400 watt inverter. I have read the humidifier part of the CPAP can beremoved to use less power. If that is the case that may help. I know many here will have a better answer