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I have fine-tuned/upgraded my RV electrical design. I will use a 31 AGM dual purpose battery for mainly starting, and have 100Ah Li battery and 12V inverter for small essentials, both charged by a Dual circuit DC-DC 50A solar powered battery charger by Renogy, which can accept the RV engine driven alternator to charge both batteries independently, and the AGM can supplement the LI battery at preset voltages thru the charger, all the while also hooked to a 100W solar panel. This gives a bit of redundancy and convenience in keeping everything charged up, at a reasonable cost
The main RV system will remain a separate 2800W solar powered, and those batteries are going to be what budget allows.
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