Wow, that thread is very old and out dated. Old school battery isolators and solenoids? A modern DC to DC smart charger will take care of all of that plus add a MPPT solar input, the ability to charge any chemistry battery. With or without a smart alternator. Be able to monitor battery voltage, draw and temp from a gauge or your smart phone. It can decide what input has the stronger voltage, so if your solar panels are kicking butt it will pick them over the alternator. Not sure if you can turn two Optima’s sideways in the Gen4’s. Mounting location is the big thing for this mod. Buying a smart charger and wire are easy.
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