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Good afternoon all. I need to purchase some of that high voltage proper DC solar cable for my DIY installation. Regarding the regs, can I use just black wire or do I need to buy some red wire for the +ve side of the circuit? I looked under a professional installation at a local public school a...

Good evening everyone, I intend to DIY install a small PV system with simple grid tie inverter. Just a cheap as you can but everything done properly. I have an steel portal frame building that's 45' by 16', the roof is steel box section fixed to wooden purlins - entirely standard agricultural...