westend wrote:
200 W of modules and a charge controller will keep your batteries better tended than many a 120V charger. I believe the suggestion to connect directly to the batteries was in reference to the OP's connections. He has the charge controller's output interrupted by the disconnect switch. The best resolution would be to wire the controller's output directly to batteries and, if a battery temp sensor is available, to connect that to batteries also. My little Morningstar controller changes the charge voltage automatically with temp changes. There is about a .3V -> .5 swing during the year.
I was incorrect. The solar panels and controller are not interrupted by the disconnect switch.