PV roofing material [RE-wrenches]

[matthew tritt]

William,

It was a grid-tie, and I used a GC-1000 with two 15 mod strings. It has
worked flawlessly (so far!) for about 9 months, meeting or exceeding my
expectations. Because the roof pitch is only a 3 in 12, the system starts
producing very early and runs very late in the day, Summer and Winter.

But, according to John Berdner, if the install is with a Sunny Boy, the
string inputs MUST be exactly balanced or something mysterious and terrible
will occur! I have to assume (assume nothing is my motto these days)
that an east-west array works very much like any array which has the
possibility of being partially shaded
because of too-tight spacing, shadows from obstructions or whatever. I
haven't heard of any problems (beside low power output) because of this type
of arrangement as long as all the mods have their diodes intact.

Matt

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