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Outdoor & Recreation
Campers, Vans & 4WD's
dual/multi battery system
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<blockquote data-quote="blisters" data-source="post: 264690" data-attributes="member: 4992"><p>Having a standard battery isolator protects the starter from discharge but means the alternator charges all batteries if hooked together but the batteries will not be optimally charged. For the best battery life and depth of charge by the vehicle you move to a dcdc charger which are pricey. The advantage also is you can hook up you solar panels when the alternator is not charging.</p><p></p><p>The correct solution if using dcdc charging is to have a dcdc charger located next to each battery, think of the charger and battery as a single unit. The location of the charger is important as they compensate charging voltage with temperature variation. You then just have to size the dcdc charger, wiring and solar panels to suit your battery capacity. condor has a very good writeup about his system that is correctly sized and proven so you could copy this or use the info to suit your application. I noticed in your earlier post that the vehicle and trailer battery should be able to be charged separately and by solar, so you'll need a dcdc converter located at each battery i.e. one in your vehicle and the other in the trailer.</p><p></p><p>Jon</p></blockquote><p></p>
[QUOTE="blisters, post: 264690, member: 4992"] Having a standard battery isolator protects the starter from discharge but means the alternator charges all batteries if hooked together but the batteries will not be optimally charged. For the best battery life and depth of charge by the vehicle you move to a dcdc charger which are pricey. The advantage also is you can hook up you solar panels when the alternator is not charging. The correct solution if using dcdc charging is to have a dcdc charger located next to each battery, think of the charger and battery as a single unit. The location of the charger is important as they compensate charging voltage with temperature variation. You then just have to size the dcdc charger, wiring and solar panels to suit your battery capacity. condor has a very good writeup about his system that is correctly sized and proven so you could copy this or use the info to suit your application. I noticed in your earlier post that the vehicle and trailer battery should be able to be charged separately and by solar, so you'll need a dcdc converter located at each battery i.e. one in your vehicle and the other in the trailer. Jon [/QUOTE]
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Outdoor & Recreation
Campers, Vans & 4WD's
dual/multi battery system
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