I have a Xantrex True Charge 20 amp battery charger. I've had no problems with it at all. I installed it in 2005. It is in the engine compartment.
I have three group 29 batteries in the house bank and one Optima battery for the engine starting battery. Two of the house batteries are in the original battery compartment at the bottom of the port locker. The third house battery is on a shelf to starboard of the rudder shaft and the starting battery is to port. A 75W solar panel along with a CS-130 alternator controlled by a Xantrex regulator charges the house batteries when we are unplugged. An Xantrex Echo Charge keeps the starting battery topped up.
Because Irish Eyes is tiller steered, the space where the quadrant would be is open. That is where the two extra batteries are.
1988 PSC 34
anchored in South Beach
Irish Eyes to the Bahamas