Doesn't this type of isolator actually feed differing amounts of charge to each battery bank, based on the amount of discharge, and taper off that charge as they reach full capacity? ? -----Original Message----- These devices are very good. Again, whether using this type of device or relay, the charge effect will be the same as the alternator will determine the charge capacity. If both banks of batteries get the 14 volts, then each will take the current it requires. A heavy duty, 150 RV style relay (looks like a Ford solenoid) coats about $15-$20. Dennis -----Original Message----- Dennis, Thanks, good info to know. I really wasn't aware of the voltage drop issue, among others. How do you feel about Hellroaring's isolator-combiners? they claim less than .005 volt drop. http://hellroaring.com/bic75150.htm I really don't see a relay system keeping proper charge on tow batteries so widely different. And yes, this is getting expensive just to keep food cool, but a cooler is out of the question for the month-long trips I take, in both the constant need for ice and space limitations. Karl |
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