I have a 2008 Monaco Knight 40 skq and I mounted 6 -100 watt panels near the rear and joined them all into a 4x4 junction box on the very rear of the roof with # 6 wire. Then I drilled a hole in the rear cap and fed two #4 wires from the junction box through the hole down past the radiator coolant tank and then I drilled 2 holes in the end of the last storage bay on the passenger side which is behind the battery bay. There I mounted a 60 amp mppt controller and then drilled 2 holes into the battery compartment and attached two #2 wires to the battery terminals. All upper holes were sealed with lap sealant. The reason for drilling into the rear cap was if I did develop a leak it will not enter the ceiling area. This supplies power to my residential refrigerator while it sits in the storage area. All solar panels were mounted with L brackets and sealed with lap sealant.