Fuse or diode or both for solar panels in parallel

[rloveless]

I am installing a bunch of panels in parallel. For simplicity let's just say I'm installing 10 100 Watt single panels in parallel. It is my understanding that I need a fuse between each parallel panel to prevent back-feeding a panel just in case the said panel has a short. Doesn't a bi-directional diode do the same thing? Can I install a diode instead of a fuse? Do I need both a fuse and a diode? I was going to order MC4 inline diode or Fuses. Pros and cons of each?

Thanks

 

[John Frum]

Usually the panels have the diodes built in.
For greater than 2 strings over-current protection is required on each string.

 

[timselectric]

A fuse is required. A blocking diode is not.
And my testing did not show the blocking diodes as useful.
So, I wouldn't recommend any blocking diodes. But code requires that a fuse is installed on each circuit. On parallel circuits of 3 or more.

 

[MisterSandals]

I'm installing 10 100 Watt single panels in parallel.

Just out of curiosity, why are you doing this? I cannot imagine an SCC that accepts 1000W of solar having a max input voltage of about 25V... so wondering what your goals and constraints are.

 

[timselectric]

Just out of curiosity, why are you doing this? I cannot imagine an SCC that accepts 1000W of solar having a max input voltage of about 25V... so wondering what your goals and constraints are.

I believe that it was a hypothetical figure.