Kent,

In my effort to get things "perfectly clear" (as Richard Nixon once said while trying to explain his involvement with the Watergate scandal), when you say that you cannot ground the PV array anywhere else, you're not saying to not bond the module frames back to earth ground, right?  Or to put it an another way, modules which have metal frames need to have those frames bonded/grounded to earth regardless of the type of inverter or system design, right?

marco
ProVision Technologies
Hilo (hello!), Hawai'i nei

Kent Sheldon wrote:
You cannot ground the array anywhere else, or you will create a ground fault, causing the fuse
to clear and the inverter to stop functioning until the other ground is
removed and the fuse is replaced. So you only need to connect PV + and -
to the inverter. The inverter will ground the array per NEC 690.

___________________________________________
Kent Sheldon
Manager, Industrial Power Systems
SMA America
925 513 8813 Brentwood Office (Primary)
530 273 4848 Grass Valley Office

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