Up to now I had only three solar panel: one on each side, and one to the front. In order to cover all 4 sides I had planned to mount one on the left rear door. There was space, and it would serve well also as a visibility protection for the inside seating area.
I had already pre-planned the mounting and had ensured that the spacing of the frame bars were suitable to allow mounting of the panel.
The panel was of the same type as all the other 3 panels.
Inside the cables currently just dangle, waiting for their connection.
Next step: configure the power setup to be able to deal with 4 panels. Problem: the solar MPPT controller at 12V can only handle up to 80V solar input.. But that is almost reached by my 3 panels. With a fourth panel the full voltage would go up to 95 V. I could remedy this to switch to a 24V setup... but then would need a 24V-to-12V DC-DC-converter again, to power all my 12V devices.
Will consider this later - my current solution is to manually select which 3 of the panels should be switched-on in series.
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