Looking at solar panel kits. 2x100watt panels & 20a controller. Noticed the descriptions say only suitable for charging 2 unconnected batteries. My question:- would this type of kit be suitable to charge my 2x110ah leisure batteries that are connected together? They are wired +to+ &-to- with the earth taken from batt1 & positive taken from batt2. How would they need connecting to a solar supply?