quite simple,..using a large guage wire, ( 4-6 guage) , connect the positive of the bike to positive of the car batt,..also connect the negatives together and ground it to the frame near the car. check your voltage draw at rest, idle and 2500RPM, if steady at 12.8 volts, climbing to 14.8 when charging all should be well,..numbers much higher or lower would show a taxing of charge or volt regulator system( check chilton specs) , car batt adds a large reserve, continued starter crank time or under size wires will heat up quickly, and could melt them if not careful,. charge will fill bike batt and car batt both,..within limits of the regulator,.. + to +,and - to - = parallel system,.. good luck, crawf.
crawf - 11/23/2009 1:45 PM
quite simple,..using a large guage wire, ( 4-6 guage) , connect the positive of the bike to positive of the car batt,..also connect the negatives together and ground it to the frame near the car. check your voltage draw at rest, idle and 2500RPM, if steady at 12.8 volts, climbing to 14.8 when charging all should be well,..numbers much higher or lower would show a taxing of charge or volt regulator system( check chilton specs) , car batt adds a large reserve, continued starter crank time or under size wires will heat up quickly, and could melt them if not careful,. charge will fill bike batt and car batt both,..within limits of the regulator,.. + to +,and - to - = parallel system,.. good luck, crawf.
So the batteries are conected in parallel. Nice. I always wondered if that would work. That sounds like an excellent setup.
G
Darn, my 01 Katana has an alternator with regulator plugged right onto it, hard to test the voltage and feel the heat on the regulator while it's cranking..
cheap $6.00 multi-meter across the battery post will give you all the info you need,....or across solonoid pins , too much voltage for too long and positive lead@ solonoid gets WAY TOO HOT!,..hehe lol crawf.
Found this over on the ADVriders forums. Looks like a simple solution for running 2 batteries off the same charging system at the same time. This was developed for the boating industry and should be well tested already.
http://www.yandina.com/NewCatalog.htm
The Combiner 100 is a voltage-sensing relay (13.3 volts) which connects two batteries together when either is receiving a charge. When the charging ceases, the relay opens so that each battery operates independently. Supplemental battery banks can be added by using an additional combiner for each bank. You never have to worry about switching to "BOTH" when your engine is running and forgetting to switch back to save your starting battery from discharge when you stop.
This combiner is suitable for installations with alternators up to 100 amps with one battery in each bank. Larger installations should consider using the 150 Amp model.
Thanks for the info. Looks like a good product.. I might give it a shot of my rig.
