If you want to charge your two batteries in a quick three hour time frame using smart mode charging then you will need something to produce smart mode 14.4VDC- 13.6VDC-13.2VDC voltage levels with a capacity of at least 17-20AMPS DC CURRENT for each battery in the battery bank.
The 45AMP smart mode converter/charger would be great for a two battery setup. I would not let them talk you into a WFCO converter/charger unit as they are known to have smart mode charging problems. Go with the Progressive or IOTA models.
I am setup for four GP24 Interstate batteries here and I use the PD9260C smart mode 60AMP converter/charger. It takes just a little longer to charge up four batteries. I can do three batteries in the three hour charge time just fine here. It takes around four hours to get from 50% charge state to 90% charge state using four 12VDC batteries in parallel with my off-road trailer powered up by my 2KW Generator.
I have enough room on my OFF-ROAD POPUP roof for three 120WATT Solor Panels. This would be great for me to use the generator first to get past the initial high DC CURRENT demand (about one hour) and then let the solar panels finish my 90% charge state before the high sun goes away around 4PM each day...
My big problem is being able to run the generator anytime I wanted due to most camp grounds I go to here on the East side of the US all seem to have generator run time restrictions in place. Solar Panels would great to use at these places...
I get to use my larger battery bank here parked at the house as well during local power outages. Always great to have power to use from emergency sources...
Roy Ken
