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Thread: Wiring an Auxiliary Battery

  1. #1
    Member
    Bike: 2013 NC700XD
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    Wiring an Auxiliary Battery

    Greetings
    I've recently gained a cPAP machine and am sorting out how to take it with me on the bike on trips. I usually camp and I'm wondering if any of you have done the wiring for an auxiliary battery.
    (Surgery is not an option: my apnea is both physiological and neurological. Mouth pieces aren't either. Going without, according to my doctor, is unwise. But I'm also loathe to stop doing trips. Thus the battery...)
    If so, some questions:
    --where did you put the battery isolator, if you installed one?
    --where do you carry the extra battery?
    --any tips on wiring and placement or anything else concerning "auxiliary battery" you might offer?

    I've gained some good input from ADVrider. I've scoured this site too. I'd rather learn from other's experience and perhaps avoid problems and didn't see what I'm trying to do addressed. If I did miss it in my searching, please point me in the right direction: I would be most grateful.

    Many thanks!
    Rainier

  2. #2
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    One other question

    Oops. I forgot to mention something that might be important.
    I ride a 2013 DCT. I know the DCT is finicky about battery power.
    Do any of you electrical wizards think charging an auxiliary battery, through a voltage regulated isolator, will be a problem for the DCT?

    Again: Many thanks!
    Rainier

  3. #3
    Senior Member Jt105's Avatar
    Bike: 2015 NC700X, 2012 ST1300A
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    My concern is how big of battery you need to run the machine all night. That could be a lot of energy the bike’s charging system would have to replace. It would probably take hours of riding to charge it.

    JT

  4. #4
    Member mooseonbass's Avatar
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    OH NO! Hours of riding. The horror! Sorry to be a smartalec, it’s the polar vortex talking

  5. #5
    Senior Member Wiring an Auxiliary Battery davidc83's Avatar
    Bike: Suzuki C50; 2009 klx250sf; 2013 Nc700
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    Instead of carrying an extra battery on the bike, why dont you get an auto travel cpap with a built in battery-works for at least 8 hours on battery, then you could plug it into a 12 volt adapter while riding and recharge the cpap battery....
    Here is an example with the optional powershell with battery:
    Human Design Medical Z1 Auto Travel CPAP Machine
    [SIGPIC][/SIGPIC]

  6. #6
    Senior Member Wiring an Auxiliary Battery
    Bike: SV,NC,berg 570s
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    I'd probably want to carry it in the frunk. That's one of the better locations for extra weight.

  7. #7
    Senior Member Wiring an Auxiliary Battery
    Bike: SV,NC,berg 570s
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    It wouldn't be too hard to put a relay between the main battery and aux battery, triggered by the tail light (or something else hot whenever the bike is).

  8. #8
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    Thanks, guys, for the ideas/suggestions/observations/ideas.

    I figure a deep charge battery, 18 Ah, should do the trick (basing this on others' experience, mainly from ADVrider). I don't foresee difficulty in wiring the switch/relay/separator gizzie (<-- technical name, there) but I'm uncertain as to best locations for components.

    There is space, discussed many times in our forum, in the area under the plastic panels on either side of the triple tree. I'm using that already to store an air pressure gauge, a frequency modulator for the heated grips, and a power distribution box, so that's my first idea for a place for the separator.

    Frunk for the extra battery seems quite feasible and a good spot for the weight. My other thought was in one of the Tusk panniers I've got, which would place the weight even lower. I'd have to make sure I balanced the load. An early check on batteries shows weights of 6 to 8 pounds for an AGM battery. Wiring into the pannier isn't a big deal. I do like projects that involve wiring...

    I'm afraid getting another cPAP machine isn't in my budget. I've investigated a few designed for travel, including the Z1 mentioned above. Sweet set up to be sure. Can't do it. Wiring in a battery with the appropriate voltage converter for my machine is going to cost close to $160. Another cPAP machine starts around $380. I'm keeping an eye on Craig's list and fleaBay for a bargain. We'll see.

    My next trip, ten days in the Canadian Rockies, isn't until June, so I've got time to properly suss this all out.

    Any other ideas/suggestions are most welcome! Thanks again for those offered so far.

  9. #9
    Senior Member Wiring an Auxiliary Battery New Commuter700's Avatar
    Bike: NC700X
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    I don't know much about the cpaps but, I was discussing the problems on the road with them with another truck driver that goes over the road with one. And what I learned was that even our two truck batteries will run down over the night. Drivers that have a cpap machine idle their trucks all night to avoid killing them. I would be surprised if a lead acid battery that fits on a bike would run a cpap through the night. I would suggest going to a nice big lithium ion battery but I suspect that would be more than a travel cpap with it own battery.


    https://tinkergr.wixsite.com/website

  10. #10
    Senior Member Wiring an Auxiliary Battery
    Bike: SV,NC,berg 570s
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    Weight distribution front to rear is important as well. There's a reason performance bikes all put you so far forward. Whether or not it matters for you I don't know.

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