I have 3 x 100W solar panels, now fixed on my roof. I bought these in a kit (eco-worthy) that included an inverter and a PWM controller with it. I regret this now because I want to wire the panels in series to keep the roof tidy and I’ve also looked into MPPT controllers more and it seems I’d get more out of the panels with one anyway.
I understand I need a 30 amp charge controller (300W/12V=25 and round up?). I was planning on getting the Renogy Rover Li 30. The problem is the wire in the kit that connects the panels to the battery is 4mm^2 (or 12 AWG). I’m assuming that I should use a max 20 amp fuse (?) for this wire so does this mean I should get a 20 amp charge controller instead?
What’s my best solution?
Thanks in advance