You can generalize across all types of batteries from NiCad, NiMh, lithium-ion, and lead acid. They all have their own characteristics. With lead acid batteries in an RV the repeated discharge, partial recharge, and then discharge again is the most damaging situation according to Trojan. Solar panel charging would keep this from happening.
When our camper is in use we draw down about 10% each night and it is restored in a couple of hours of daylight. When we are not in the camper the solar charge controller functions in a similar manner to a trickle charger.
Fully charged batteries can better withstand cold weather during storage of the RV as well which is another advantage of the charging by the solar panels.
