I am in agreement that more battery power is needed....especially since you only get to USE half the amp hours that you buy. Instead of gettig 6V's (which I like for FOUR battery applications)...I'd suggest true 12V marine deep cycles in whichever size you can get in there...group 31 or 27 preferred to give you around 200 amp hours. (See DEKA/Penn Marine Master with DC in the model #!)
The REASON is that if you have a SINGLE 6V battery failure ...you have O power. With a 12V pair....all you need is one.
Next... you must understand that ALL wet cell batteries
are going to be limited to taking BULK charge amps at about 20% of RATED capacity. Thus for a 200amp hour battery bank...any charger over 40 amps will not get you one minute faster charging.
So...if you are "refilling a 200amp bank from 1/2 full....i.e. trying to put back 100 amp hours....you'll have about 2 hours of BULK charging to put in 80 amps and than roughly another 2 hours of absorbtion and float charging to get to 100%.
If you want to charge more quickly...you need to move to AGM's which can take AT LEAST 50% of their rated charge in bult mode,,,,which then means you could charge at 100amps on a 200 amp hour bank. You are still faced with a big slow down for the last 20% but you should be able to charge to 100% in about 2 hours.
Suggest that IOTA DLS chargers with SmartIQ feature provide excellent price and performance and are widely available. If you go with AGM's then their DLS90 would be a great choice.
I also prefer the Victron Battery monitor over the Trimetric....but they both perform the same essential functions and no boondocker should be without one or the other if they want to keep their batteries rather than kill them!