shinybeast
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Re: Proper Fusing Of Three Parallel Panels
Thanks for the replies. BFL13, the cooperbussman link was just what I was looking for. If I have it right for my stuff... (3-1)*7.5=23.4 I'm using #10 wire (30A max) which is over the 23.4A calculated above so I don't need fuses at panels, correct? I read somewhere that if one panel in a string of three or more in parallel failed somehow, the current from the others could/would start a fire as it overloaded the bad one. Being new to solar I felt compelled to seek out the safest way to setup and use my new gear with my new TT.510Views0likes0CommentsProper Fusing Of Three Parallel Panels
Hi all, I need some help with fuse size of my little array. I've searched this forum and others and answers seem to range from 'fuse to the wire size being used', 'go 25% above Isc of panel' or 'use appropriate size fuse'. What I do know so far is I should fuse each panel on the positive lead when paralleling three or more. I'm using three 120w Solar Cynergy panels: Voc - 21.0v Isc - 7.5a Vmp - 17.0v Imp - 7.0a connected in parallel with #10 wire and y-connectors with MC4 ends. I was thinking of cutting up the y-connectors to make my own combiner box with a fuse from each '+' wire in box to '+' bus bar, '-' wires to '-' bus bar then 12 ft. of #6 wire from bus bars to my Morningstar SunSaver Duo controller. Sorry if over describing just trying to be clear, hopefully. Thanks for reading!2.3KViews0likes15Comments
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