2017, 3790 RD Another battery/solar/charging question......

[Jsrore]

Merry Christmas to everyone!!!!!!!

To start this off i don't have access to the RV so i cant look, hoping someone will know the answer...
what type , style ETC converter/charger do i have?
we bought some land in Idaho late last year and plan on spending ALOT of time there, will be doing off grid camping...we bought 200 watt solar panels and i will install 2 more T105 batts for a total of 4 of the T105...i think i may need at least one more panel for 300 watts or maybe 2 more for 400 watts.
We also just bought a a Firman P08003 8000 watt generator.
i had never heard of Firman , did a lot of research and they get great reviews from all over the web.
the reason im asking about the converter/charger is not sure if it has enough power to charge the 4 T105 when i have the generator running...
may need to buy another brand/type.
appreciate any and all comments, advice etc...

Thanks
Jeff

[Carl n Susan]

You most likely have Progressive PD75 (or larger) converter. I have the Progressive in my 2012 and it handles the six 6V batteries I use. You will be fine with only four 6V batteries.