Series vs parallel

[s1000pre]

I have a victron MPPT 100/50 controller and (4) 175 watt renogy panels. I am planning on running two pairs of panels in series, then directly into Airstreams pre-wired box on the roof. The street side will have two in series and curbside will have two in series. Im thinking to separate the street and curb side due to potential shading from the AC units. Thoughts?

[richard5933]

Sounds similar to what I did when installing on my coach.

My initial panels were going to be three folding ground-deployed panels. I wanted as long a cable connecting them as possible so the panels could be in the sun while the coach was in the shade. Panels in series have higher voltage & lower amp output than parallel, so that's what I went with since it allowed for use of smaller gauge/longer wiring.

Later on my plan is to add roof panels which would be in series as well. Then I'd parallel the two sets of panels by using a three-position disconnect switch (A, B, or A+B).

The only caveat is to watch the total voltage output for each set of panels in series so that you don't inadvertently exceed the controller's limit.