I'm working on a project where I'm using two Renogy 16BB N-Type 195 Watt Solar Panels in parallel, and I have some questions since I'm quite new to solar setups. The Renogy Rover MPPT 30A charge controller indicates a maximum PV input of 400 Watts. I'm a bit confused here since that seems like it would mean around 33.3A at 12V, right? Should I consider using a 40A controller instead? I don't plan to add more panels later.
Also, I'm looking into the inline fuse. I did a quick calculation: 6.68 x 1.56 x 2, which gives me 20.85 – so does that mean I need a 30 amp inline fuse? Thanks for any clarifications!
1 Answer
Just a heads up, the charging voltage isn’t actually 12V, so that 33.3A at 12V figure isn’t right. With 400W, you’re looking at a little under 30A out with your setup. As for the inline fuse, you typically don’t need one between the panels and the MPPT if you only have two panels in parallel. Fuses are more relevant once you add more panels in series since they can create a fault scenario. Just make sure your wiring can handle the current and keep safety in mind!
So, you're saying that if I have just two panels, I really don’t need a fuse between them and the charge controller? That makes sense!