[THEFERMANATOR]

Originally Posted by spareparts

BTW, you cant mix AGM batteries and wet cell if they are charged by the same source.

You can IF you properly isolate the batteries from each other. RV's routinely use lead acid batteries for starting and agm for the house loads. They install an isolator so the alternator charges each battery bank individually off of 1 alternator. Or you can run a dc to dc charger or charging relay setup to also do it. You just have to use a system so different battery types are not paralleled at rest because agm batteries have a higher static voltage than lead acid do, so if you mix them, the lead/acid will constantly drain the agm battery at rest.