Posted: Fri Jul 28, 2023 12:07pm
You don't have to explain the function to me. I am an electronics engineer. And I have very good knowledge about PV systems.
If a system is properly designed and built, there is always a reason for a fuse to blow. This has to be determined. Replacing the fuse with a stronger one is usually not necessary unless something was done wrong during the system design...
An example: The fuse is sufficient but a contact on the fuse could be a little loose or corroded. This will cause the fuse to heat up and blow prematurely. If the fuse is replaced by a stronger one in this case, it may no longer blow and the contact heats up much more, which can lead to a fire.
Therefore, my advice: before replacing the fuse, the cause of the blowing should be determined.
You can also send me more information and photos and I will take a look. Especially the technical data of the PV modules and the inverter would be very helpful.