DC Charging Source? - K-Bikes.com - Excellence in Motion
 
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post #1 of 10 (permalink) Old Jan 3rd, 2009, 8:59 pm Thread Starter
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DC Charging Source?

Got a couple bikes in a storage unit with no AC power available. Rather than remove the batteries this winter, I'd like to put them on some type of charging setup. That's so I can ride the bikes on the occasional nice winter day here in Central VA.

I thought of using a large deep-cycle RV battery as a power source, running it through a Radio Shack DC-AC converter, then to a Battery Tender. I figured this ought to keep the bikes' batteries up to snuff for a few weeks until I had to take the RV battery home to charge it.

Anyone think of a more elegant system?

Thanks,
Troy

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post #2 of 10 (permalink) Old Jan 3rd, 2009, 9:31 pm
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What about a car battery directly connected to the bike 12v to 12 volt. I imagine a car battery ought to keep a bike, or two, or three, charged all winter.

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post #3 of 10 (permalink) Old Jan 3rd, 2009, 9:48 pm
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It's possible with another battery but the charge would have to be higher than 12 volts or what ever the batteries to be charged are rated at, possibly some kind of DC to DC converter to boost the voltage. The DC to AC thing might be the setup to use.

Last edited by RIPJAM; Jan 3rd, 2009 at 10:02 pm.
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post #4 of 10 (permalink) Old Jan 3rd, 2009, 11:45 pm
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Just take the battery home and save the braindamage. Simply hooking it too another battery will only cause them to equalize and decay at whatever battery chemistry loses charge fastest.

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post #5 of 10 (permalink) Old Jan 4th, 2009, 7:23 am
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"Got sun?"solar battery maintainer... http://www.siliconsolar.com/12v-sola...w-p-16678.html Stick it on the roof or outside wall of your storage unit..."set it and forget it" cheap cheap cheap $...Bring your battery up to 80% or more hook it up and your done....works great on trolling motor and RV deep cycle batteries also

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post #6 of 10 (permalink) Old Jan 4th, 2009, 2:33 pm Thread Starter
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Quote:
Originally Posted by BAK04GT
"Got sun?"solar battery maintainer... http://www.siliconsolar.com/12v-sola...w-p-16678.html
Cool, I'll have to check this out...thanks.
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post #7 of 10 (permalink) Old Jan 4th, 2009, 4:32 pm
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That's a good idea, if you can keep it from getting too dirty or stolen.

Quote:
Originally Posted by BAK04GT
"Got sun?"solar battery maintainer... http://www.siliconsolar.com/12v-sola...w-p-16678.html Stick it on the roof or outside wall of your storage unit..."set it and forget it" cheap cheap cheap $...Bring your battery up to 80% or more hook it up and your done....works great on trolling motor and RV deep cycle batteries also

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post #8 of 10 (permalink) Old Jan 5th, 2009, 5:23 am
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Using a larger RV battery and inverter will be very 'lossy' wasting capacity in the larger battery. Both batteries will self discharge when left and that's where the biggest discharge loss will come from.

It's a bad idea to let batteries go to low charge. Providing an alternative energy source from solar or wind or removing the battery is the best thing to do.

Alternatively, save money on building a charging system and buy an Odysee battery which has a much lower rate of self discharge than standard lead acids or gels.



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post #9 of 10 (permalink) Old Jan 5th, 2009, 11:51 am
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Just ride them.

I'm in Maryland and ride everyday into DC. Coldest day thus far was 15 F at the start and it got up to a blamy 21F by the time I got to work. Even if you only ride once a week the batteries will stay charged.

Terry


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post #10 of 10 (permalink) Old Jan 5th, 2009, 1:05 pm
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Troy,

Good luck with the battery charging. I do love the Amherst area and visit it often. You have good taste in motorcycles.


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