At what voltage does the Morningstar SS-MPPT-15L SunSaver Solar Controller begin to charge batteries?
Posted by Frank Molina, Stellavolta on Jun 23rd 2020
Before connecting the battery, measure the battery voltage. It must be over 7 volts to power the controller. For 24 volt systems, the battery voltage must be greater than 15.5 volts to properly detect a 24V battery. The 12/24 volt battery detection is automatic and the check is only performed at start-up.