How to Fuse your Solar System - Renogy - solar panel kits The size of this fuse is dependent on how many solar panels you have and how they are connected (series, parallel, or series/parallel). If the panels are connected in series, the voltage of each panel is added but the amperage stays the same. How to properly fuse a solar PV system - WindyNation How to properly fuse a solar PV system. NOTE: If you are unsure about this area, consult an electrician. fire or getting dangerously hot. In this case, the battery, wires, and AC/DC inverter will be safely disabled by the fuse. Solar Panel fusing. In the case of panels in parallel, a 30-amp fuse is required for each panel. If your