My new Trailmanor has a Samlex SCC-30AB controller for the 80 watt solar panel. If I am not mistaken, this is different than earlier models. It is a true 4 stage charger and may be safer to leave the battery connected that earlier 2 or 3 stage chargers.
But, the reason I am posting is that Samlex has a product manual that has a very good tutorial about deep charge batteries in general and information about charging with a solar panel. I found it a very good source for learning a bit more about the 12 volt side of life. Here is the link:
http://www.samlexamerica.com/product...il.aspx?pid=60
Mark