string fuse 2s 2p do I need it ?

[motomarc]

with these panels in 2s 2p

Phono 400W Mono Solar Panel | PS400M6-18/VHB

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the plan is to have 2 arrays 2s 2p just wanting to be extra safe.

short circuit isc is 13.52 stp amp & 10.92 amps in notc I have no clue what either of these mean LOL can/should I use a 25amp fuse??

thank you in advance for your knowledge.

MM

 

[chrisski]

Each string Probably will not, but if this is a ground array, I like circuit breakers for trouble shooting to make shutting strings off easier.

Whether you need OCPD on both strings is whether or not the max series fuse rating is exceeded by two strings in parallel. Rarely is the max sreies fuse rating exceeded by only two panels in parallel.

Still will need OCPD after combined.

 

[motomarc]

Each string Probably will not, but if this is a ground array, I like circuit breakers for trouble shooting to make shutting strings off easier.

Whether you need OCPD on both strings is whether or not the max series fuse rating is exceeded by two strings in parallel. Rarely is the max sreies fuse rating exceeded by only two panels in parallel.

Still will need OCPD after combined.

well the 2 strings in parallel are actually higher than the 25amp rating at 27.04 amps.
So I just ordered some 30 amp inline Staubli fuses for the 2 sets of 2s 2p .
I am also looking at a 30 amp din breaker for the disconnect.
I hope I didn't waste some money LOL.
thank you again for your time.

MM