dc isolators

[oddjob]

can anybody help
i am fitting 9.8kwts solar pv i need to know what size d/c isolators i req and how many it's been put on a 3phase supply and in 4 strings of 10 panels.cheers oj

 

[JulianC]

One per string, rating determined by string Voc (x 1.15) and Isc (x 1.25). Don't forget, 4 strings into one inverter will require string fuses in pos and neg of all strings.

 

[oddjob]

i am right in saying i add these two figures together. two much paperworkl to think staight.cheers oj

can anybody help
i am fitting 9.8kwts solar pv i need to know what size d/c isolators i req and how many it's been put on a 3phase supply and in 4 strings of 10 panels.cheers oj