Charging Auxiliary Batteries - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 7 Old 01-18-2012, 08:54 PM Thread Starter
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Charging Auxiliary Batteries

Does anyone have experience with charging auxiliary gel cell batteries while riding? I want to operate my amateur radio station while camping and will need to bring some gel cell batteries to run my transceiver while in camp. I can always recharge the batteries using a PV array (unreliable at best), but I was wondering if anyone had experience charging additional batteries from the alternator. I am looking at a 12VDC at ~14A battery. Specifically, can the charging system charge that additional load?

Thanks,

Steve, KK1VT

Riding a '08 DL650....The Death Valley Queen, with an ever changing configuration of accouterments.

Last edited by Green Mountain Shooter; 01-18-2012 at 09:03 PM.
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post #2 of 7 Old 01-18-2012, 10:47 PM
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I'd go with a 14ah AGM rather than a gel cell, gel cell's need to have the initial charge current limited more so than AGM batteries and there's really no easy way to do that.
Unless you run the aux bat down to near dead, I would doubt the wee's alt would be seriously taxed.
I'd just parallel the aux bat with the bike's bat through a 10-15A fuse for safety's sake but you'd need a series diode to keep the fuse from popping and maybe toasting the hookup wire a bit when starting the bike.
Or just unhook the aux bat before thumbing the starter switch.
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post #3 of 7 Old 01-20-2012, 06:14 PM Thread Starter
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Thanks Zorlac. I have read about this battery technology but did not consider it. I'll further research.

GMS

Riding a '08 DL650....The Death Valley Queen, with an ever changing configuration of accouterments.
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post #4 of 7 Old 01-20-2012, 10:35 PM
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aux battery charging

not sure if this would apply to your situation... but when I had a camper on my truck, I had a separate battery for it. I installed a "battery isolator" (available at RV dealers) and it charged off the truck alternator. It kept the two batteries separate as far as charging and discharging issues. I don't know why a similar setup wouldn't work for a motorcycle also.
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post #5 of 7 Old 01-20-2012, 11:38 PM
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Definitely look into the RV battery isolaters.

What kind of rig? G5RV antenna?

-Tom (DL650AL2) (KA1TOX) (E-I-E-I-O)

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post #6 of 7 Old 01-21-2012, 11:00 PM Thread Starter
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Presently have a 40 M Rockmite kit from Small Wonders Lab that I built. Am also looking at picking up a Yaesu FT-817, but for another $100 you can get a 100 watt rig so I am having a hard time deciding. Hence my question about the battery. Antenna would be something compact like a 40 M dipole or a variation; sloper, inverted V, or a delta loop. I am using a 102 ft dipole fed with ladder line (aka the venerable G5RV without the coax feed line) here at home. Rig here is an FT-840. I do enjoy building my own QRP rigs. Check out my listing on QRZ.com.

73 de KK1VT
aka Green Mountain Shooter

Riding a '08 DL650....The Death Valley Queen, with an ever changing configuration of accouterments.
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post #7 of 7 Old 06-20-2012, 09:15 AM
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is there a solar panel option for charging as well?
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