Want to change the ProMariner ProTech 1230 with a new ProNauticP 1240P. Need a bit of more umph and a better sensing unit; it seems the old unit is not working well. Running two banks of Group 31 Trojan AGM's. A 300 amp house bank 3 batteries and an engine start group 100 amp and one battery. ProMariner support says the new charger can handle 3 banks and it doesn't matter if they are not the same amperage. They said that about the old one but it didn't do it very well but this one is supposedly better sensing. The new one is purchased. Any comments are appreciated. Particularly as far as installation. The old charger had a landscape format and the new one is portrait so it is a tighter fit. The circuit breakers on the charge circuit have to go to 50 amps but I'm wondering how close the charger can be to the overhead seat or if it should be mounted sideways to give more room. This 1240P is the same as the same type Sterling brand charger.