grounding array/sunny boy [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

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>Marco, when I refer to 'grounding the array' I am referring to PV 
>electrical grounding. This is the grounding of the + or - PV 
>conductor. In most (99.9%) US installations the negative conductor 
>this is grounded at/within the inverter. .....     There is much 
>debate over this subject, as the US is the only country that feels 
>it is necessary to electrically ground the array.
>...
>
>Kent Sheldon
>Manager, Industrial Power Systems
>SMA America


Kent,

If you don't mind, what is your opinion on the matter? Would you 
rather see the PV + and - "floating" (ungrounded). That technique is 
preferred in telecom, I've heard, to reduce incidence of lightning 
related damage. It is also what we recommend in solar water pumps, 
and it makes good sense to me, and many others have expressed this 
opinion regarding wind systems etc.

Is this an NEC issue that we should try to change?

Thanks,

Windy

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