Ford Transit Solar Panels

The beautiful flying machine gets a solar panel.
Ford transit solar panels. Each side of the van has 8 1 2 foot runs of unistrut. Just recently bought a ford transit cargo and am building it out from scratch. Hey ya ll i had a quick question. This kit is for solar panels that will span across our roof rails that are 57 5 8 center to center.
The popular grape solar 180 watt panels will work for this application. Not knowing much about how to complete the rest of the electrical system i contacted am solar and asked if they could advise and sell me whatever else i needed. A 4th solar panel could fit on the roof but was not installed. He does 3d computer design work and i thought he is going to need a lot of power.
Or is that something you all would do after in order to have the anchors of the solar panel mounts accessible through the ceiling. The solar panel roof mount was built from scratch by securing aluminum slotted hole strut channels unistrut through factory drilled holes in the roof of the ford transit. We chose a used 2018 full size ford transit cargo van and 3 lg 360w solar panels. Any panel that is roughly 57 long will work.
The factory drilled holes are capped as shown below. Would you recommend installing the solar and ventilation first before the insulation and walls ceiling.