FHU - Solar - Battery Charging

Your solar charge controller is actually set a wee tad lower than my Blue Sky controller manufacturer recommends.... 14.6V for bulk and top end charge. To answer your question, yes, a good healthy charge such as your solar controller is doing will probably mandate at least a monthly check of battery water levels. I try to check mine every two weeks and they do use a fair amount of water. A 'slight' bubbling of the electrolyte when charging under these conditions is desirable for maximum wet cell battery health ... but overdoing it, such as when my controller was set for 14.8 is too much. Given that you have described a very healthy usage of your batteries on a daily basis.... by not discharging them over the 50% capacity mark, sounds like you are in pretty good shape. As long as you keep the water up in your batteries and the tops cleaned they should last a long time.

Incidentally, I often run my RV on shore power when stored at home... have seen no problems with both solar and shore charger working in tandem.... I don't know which, if either, is doing the most work.

just my opinion.