In a parallel system a combiner box is used that holds the fuses breakers to each panel plus one or more combined fuse leading to the charge controller or grid tie inverter see figure.
Fuse from solar panels to charge controller.
Eco worthy pv junction box combiner box makes install off grid multiple solar panels easier and professional.
If the panels are connected in series the voltage of each panel is added but the amperage stays the same.
Maxi fuses are typically used for charge controllers or smaller inverters.
A solar panel circuit breaker is well protected.
The size of this fuse is dependent on how many solar panels you have and how they are connected series parallel or series parallel.
For that setup you will not need fuses between the solar panels and the charge controller.
The second fuse between your solar panels and charge controller is a little bit different to figure out.
If your panels are smaller than 50 watts and use only 12 gauge wires and 20 amp fuses are required.
It greatly simplifies input wiring of dc power distribution cabinet and controller.
1500w 110a 1500w 200a 2000w 300a 3000w 400a a spare fuse is recommended with with the purchase of a fuse holder.
Inverter rating fuse.
Atc fuses are used for dc loads.
Providing lightning protection short circuit protection and grounding protection and supervision for the performance of the photovoltaic system.