Boomer has two starting batteries, and then two house batteries for a total system capacity (starter + house) of over 500AH. I use a solenoid to isolate the house bank from the starter bank. Delcity makes a "smart" solenoid that disconnects one bank when it senses the other bank has dropped voltage below 12.8 or something. This looks like a pretty clever solution for isolating without the additional wiring associated with a solenoid switched off the ignition / starter circuit. I am running a stock 100A Ford alternator. I would love to have 200+ A of charging capability, but it isn't in the cards for the time being. The stock alternator hasn't complained too bad from the additional load, but I'm not typically running any of the banks down very far between charging, and Boomer sits on a 110V charger when its parked in the driveway.
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