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FJR Motorcycle Forums
Technical & Mechanical Problems
Electrical Smuggler
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<blockquote data-quote="Fred W" data-source="post: 1363303" data-attributes="member: 3828"><p>There are some problems with your plan, probably stemming from a basic misunderstanding about what batteries can and can't do..</p><p></p><p>Batteries are not <em>sources </em>of electrical power. They are merely storage devices for power that has already been generated. So what you will be doing is charging up the second battery while riding and then deeply discharging the second battery to run your accessories, etc. when you stop to assist. Repetitive deep discharging of any battery is not good for the battery, and the very heavy load you'll be placing on your alternator afterwards to recharge the dead battery is not good for your alternator and regulator/rectifier.</p><p></p><p>You could entirely avoid the need for a second battery just by keeping the bike's engine running, and the alternator <em>generating </em>power, when you stop to assist a cyclist. That is what I would try to do if I needed to keep a bunch of electrical devices going while on the side of the road. The liquid cooled engine will not mind being idled.</p><p></p><p>I hope this helps. Good luck with the charity ride.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1363303, member: 3828"] There are some problems with your plan, probably stemming from a basic misunderstanding about what batteries can and can't do.. Batteries are not [I]sources [/I]of electrical power. They are merely storage devices for power that has already been generated. So what you will be doing is charging up the second battery while riding and then deeply discharging the second battery to run your accessories, etc. when you stop to assist. Repetitive deep discharging of any battery is not good for the battery, and the very heavy load you'll be placing on your alternator afterwards to recharge the dead battery is not good for your alternator and regulator/rectifier. You could entirely avoid the need for a second battery just by keeping the bike's engine running, and the alternator [I]generating [/I]power, when you stop to assist a cyclist. That is what I would try to do if I needed to keep a bunch of electrical devices going while on the side of the road. The liquid cooled engine will not mind being idled. I hope this helps. Good luck with the charity ride. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Electrical Smuggler
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