Morningstar SS-MPPT Controller – This is the smallest MPPT controller that we offer. It provides 15 amps of charging power to either a 12v or 24v battery bank from a 12v, 24v or 36v array. This controller also has load control including lighting control so that it can be used for street lighting! Settings can be changed via DIP switches on the unit or by connecting to a laptop. Non-volatile memory means you can program it before going to the site. And of course, Morningstar’s traditional “epoxy patent” – all components encapsulated in epoxy for best protection. 30 days data-logging via optional remote meter.