Use Of String Fuses

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binky

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For larger commercial systems, string fuses seem popular with some installers, although none of the Solar Farms I have worked on have then fitted. I know paddler fitted them to his mates factory, but I'm a bit lost as to how why and when they maybe considered truly beneficial to a system, and can't think of any legal requirements, so thought this may make an interesting discussion.

 
most of the inverters I use check the strings on start-up and monitor them, What brought it back to mind is that I was looking at a fronius CL48 which uses a DC string marshalling box before the inverter, which also contains string fuses.

My mistake on the factory, thought you fitted fuses and SPDs

Articles are interesting, basically its saying if you are connecting more than 3 strings to a single MPPT then the potential for nastiness is quite high.

 
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