Fuse Between Solar Panel And Charge Controller

10a car fuses are fine for that.

Fuse between solar panel and charge controller.

Jst ensure you use appropriate wire gauge. First between the charge controller and battery bank second between the charge controller and solar panels and third would be between the battery bank and inverter to determine the fuse size needed between the charge controller and battery bank you simply match the amperage rating on the charge controller. As an example blue sky recommends a 60 amp fuse breaker for their solar. Mppt charge controllers on the other hand are able to both lower the voltage and increase the current flowing between the controller and the battery bank so the exact size wire and fuse size must be recalculated or obtained from the charge controller manual.

Mini fuses are typically used for small system components like battery management systems or monitors. The load terminal of the solar controller can be connected with a dc power device which is the same working voltage as the rated voltage of the battery and the controller supplies power to the load with the battery voltage connect the positive and negative poles of the load to the load terminals of the controller there may be voltage on the load side please be careful to avoid a short circuit when connecting the load a fuse should be connected to the positive or negative cord of the load. With a pulse width modulated pwn charge controller the worst case amps flowing to and from the controller are the same so the fuse and wire size can match. For that setup you will not need fuses between the solar panels and the charge controller.

Maxi fuses provide circuit protection typically between a charge controller or small inverter and a battery bank. With 10a fuse you could deliver 120w before it breaks.