Locate the rafters with your stud finder and place a chalk mark in each spot as you go.
Align the solar panels alongside each of the rafters. Align your flush mounts using a level.
Drill the entry holes using a pilot bit to make sure your rafters do not split.
Utilize lag bolts to anchor your flush mounts to the rafters.
Place a metal flashing over every mount and attach the metal rails to the mounts with the 3/8-inch stainless steel bolts.
Check your manufacturer's information to determine if your mounts snap or slide into the housing architecture. Snap or slide the solar panels onto the rails.