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You should be fused at 10A between the junction block and the solar. If I follow GW post his concern and valid is if there was fault on the solar side you could see high amperage backfeed through the panel wiring from the battery.
Probably preaching to the choir... but just in case someone is new to car wiring and hasn't given it a lot of thought.
Some circuits were once accepted to not be fused, e.g., battery to starter - though this is changing. But almost everything thing else goes into a fuse then to a fuse block for distribution. The entire purpose is to keep a minor wire defect from burning up the entire harness, or catching the car on fire. Nearly all car fires these days (that aren't arson) are caused by user added circuits that are improperly fused (or where a 20A fuse was placed in a 5A fuse socket).
^^I thought of doing a sliding panel. The truth is, I don't really need a roof rack as I am single and can fit all my gear in the cab. I opted to mount the panel as I did in the rare case I need to haul something longer than 7 feet.
A sliding panel would be cool though, I did see a few variations online whilst I was researching the project.
The mounting system that Phil linked earlier would be the best for me, the cost is hard to swallow though.
I recently did some testing on panel output from 10AM - 2PM. Didnt see enough advantage in moving the panel to justify spending any money on a mounting bracket to adjust the panel.
Do the trig
Are you making power daily? Performance report
Yes, positive gains each day sitting in the sun for 9 hours with the fridge running (32°).
Voltage is between 12.4-12.9 when checking throughout the day.
I'm sure at lower ambient temps I'd get to float mode and the controller would stop sending power to the battery.
I'll find out for sure next month when I'm in Ouray for a week.