20A Solar Fuses Connector IP68 Waterproof 1000V in-line Fuse HolderFor Solar Panel and Inverter in Photovoltaic SystemSolar Surge Protection Device（4 fuses + 2 Fuse sConnector ） Pvfarosh Solar Connector Fuse WHY WOULD I NEED SOLAR FUSE? Solar fuse can be the additional protection to prevent your expensive solar appliance from too hot or fire when the power surge occurs to your solar system. The solar fuse can quickly interrupt the circuit once the fuse's rated amperage is exceeded. Keep your solar system safe, also keep you safe. HOW TO CHOOSE A PROPER SOLAR FUSE FOR MY SOLAR PANEL? ATTENTION: It is needed to consult an electrician about the question before you buy it if you are not clear about this problem. IF YOU USE THE PWM SOLAR CONTROLLER: The short current in the solar controller and fuse are the same, so you can choose the solar fuse according to the PWM controller specification.