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PennyPA's avatar
PennyPA
Explorer
Jun 01, 2014

Using an O2 concentrator in a car

A friend, ex-camper person since her husband died, wants to take a few trips but needs O2 continuously. She cannot use a portable O2 concentrator because it does not go high enough for her so she needed a way to use her regular concentrator while she's driving. Here is what she has done. Can anyone think of any solutions to the "I forgot to turn off the concentrator when I left the car" scenario or does anyone have any helpful comments?
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Well, here's how this has played out thus far. I bought the pure sine 1000 wt inverter (has 2000 wt surge protection)and had it installed behind 3rd back seat on left (because it was a straighter shot since battery is on left). It is wired directly to battery and has a remote control which is in the glove box. The Invacare oxygen concentrator is mounted in the very back and stabilized with straps to the wheel well (?). This location will make it easy to remove it from the tail gate into the motel room. We tried it out on about a 80 mile trip Friday night to watch the great grandkids play Tball. It worked like a charm. The thing I'm going to have to get accustomed to is being absolutely positive that I turn the thing off when I stop the motor. I noticed tho that this Invacare really sets up a loud screech whenever it gets a kinked cord or if it loses its power source. As soon as we'd stop, if I hadn't already pushed the remote stop order, the concentrator could be heard 20 feet away, screaming his little head off. So, this just may work. Grandson-in-law mentioned something about wiring the remote into the alternator and it would shut off the concentrator and I wouldn't have to worry about that. Forgot to mention that the inverter has a built in fuse. (I also joined AMAC roadside assistance ---- just in case. Trying to cover all bases. lol). Thanks to all who offered suggestions and if anyone sees a glaring potential problem, please let me know.

5 Replies

  • When the quacks had me on an O2 concentrator, the machine drew 480 watts. Roughly a 40 amp draw counting inverter vigorish.

    Make sure you car's alternator can develop 40 amperes in stop and go driving, with the headlights and AC on. If it cannot I sure would consider pre-emptive replacement of the car battery with a top of the line AGM battery. Read again, the part about "worst-case" headlights and AC, in stop and go driving. Concentrators need lots of trail mix.
  • When I had to carry o2 and concentrator for my wife,she was on 5lpm. I carried the concentrator in the camper for once at camp. I then carried 12 of the large o2 tanks to cover when traveling. I know they do not last long at higher o2 lpm, but you will still need to carry some for times without the concentrator. Depending on where I camped I made arrangements for replace o2 tanks from local dealer.
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    I too would go with the isolator, I'd also upgrade the 12 volt wires at least one size just to be safe.. XANTREX says that for as much of the run as possible either tape them together or use a split loom (Actually they said tape 'em up).

    I like your plan, sounds sound to me.
  • Hi,

    It would be easy to add a continuous duty solenoid to run the inverter when the ignition switch is in the on position.
  • Tow vehicles with charge-the-trailer-battery lines are often equipped with an isolating solenoid that shuts off power to the trailer charging line when the vehicle engine is turned off. Link

    I wonder if one of those could be wired into this setup?

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