This is my initial mount with AMSolar installation kit. Kit was one panel, 125 watt; one controller, Heliotrope HPV-22 with MPPT; and all mounting and wiring hardware. Emphasize "all," no trips to the hardware store, all components included. Part of the wiring package was a 4 panel combiner box to allow a single wire from roof to controller down reefer chimney. Next photo shows that I ultimately used all four terminals in the combiner box.