SW has discovered lightning [RE-wrenches]

[Jeff Clearwater]

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Hi Kurt,

I once had a system with repeated C30 failures in a frequent 
lightning area.  We had the  array grounded separately from the C30. 
i.e. there was a ground rod at the array, a ground rod at the SW but 
no ground wire between.  I've theorized that when lightning hit - 
even a few miles away - a voltage difference develops between the two 
rods and you blow the equipment.  This was our theory anyway - when 
we added a ground wire between the two rods the failures stopped.

You say the system was well grounded - how well?

Jeff C.

>
>Greetings all,
>
>I have a grid-tied System with battery that was installed in 1999 and
>has been glitch free since.  The client came home after a weekend away
>and found no power in the residence.  There had been a bad storm in the
>area while they were gone.  The system was well grounded and had Deltas
>front and rear.  In any case, they cycled power to the SW and it took
>right off with things apparently working normally. 
>
>Since then, however, there has been a couple other storms in the area,
>and apparently all that needs to be present is a little rumble of
>thunder and the SW shuts down.  Never happened like that it the past.
>Any thoughts greatly appreciated.
>
>Kurt Nelson
>
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Jeff Clearwater
Village Power Design Associates
http://www.villagepower.com
jeffc at villagepower.com
Sustainable Energy & Water Solutions for Home & Village

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