[RE-wrenches] St Croix

[Jason Lombard]

unknown, I will send an email and ask.

On Mon, Feb 9, 2009 at 3:16 PM, Dana <dana at solarwork.com> wrote:

>  Any random brown spots on the trace lines intersections? [on the back
> encapsulate]
>
>
>
> Thanks -
>
>
>
> Dana Orzel
>
>
>
> Great Solar Works, Inc
>
> www.solarwork.com
>
> E - dana at solarwork.com
>
> V - 970.626.5253
>
> F - 970.626.4140
>
> C - 970.209.4076
>
> "I'd put my money on solar energy… I hope we don't have to wait 'til oil
> and coal run out before we tackle that."
>
> —Thomas Edison, in conversation with Henry Ford and Harvey Firestone, March
> 1931
>
>
>
> *From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
> re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Jason Lombard
> *Sent:* Monday, February 09, 2009 1:37 PM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] Interesting question
>
>
>
> This is from an installer in St Croix about and issue he had. Any thoughts?
>
>                 I have a client w/ an older solar array. They are at least
> as old as 1991, and I installed 1 new panel and new SW4048 and L-16 bats in
> Jan 2000. The 24 modules are Solarex "SX 110" but they have a 2.1 Isc and
>  they measure 17.5" x 42 " each  I believe they are @ 35W each.  They are
> wired 4 modules  in series , 6panels@ 48V nom.  w/ 2 panels parallel in J
> box on roof w/no fuse, or diode.  3 pos
>
> power leads go down to SQ D fused Disconnect (3, 10A FLNR fuses).
>
> After opening PV disconnect at array site,  and measuring Voc on each input
> terminal (@ 75Voc each) I measured Isc . I got 3.9 on West, 1.9 in middle,
> and 3.9 on east. After I had finished w/this measure, I Heard a loud pop,
> and when we inspected array found 1 panel w/cracked glass and an electrical
> blow out on underneath on back sheet of module.
>
> This was the East panel, and measuring Isc on all again, got 3.9 West, 1.9
> Mid, and 1.9 Isc East.
>
> I did not wire the array, though I did rewire the j box w.new busses.
> Interestingly, each 48 V panel has 2 Pos wires, each measuring 75 Voc .;
>  i.e. each output circuit (to 10A fuse) has 4 Pos wires coming into it.
> Though I did not confirm w/isc test, I imagine that 2 wires were used for
> Pos on each 48 V panel. There are also a total of 4 –ve wires for ea panel
> as well, all –ve on 1 buss.
>
> All panels were in direct sun when this blowout event occurred.  Also, all
> modules had severe darkening of cells.
>
> Care to  comment on this, what happened and why?
>
>
>
> --
> Jason Lombard
> Open Hand Solar LLC.
> Certified Sustainable Building Adviser
> www.openhandsolar.com
> 505 795 8646
>
> "I'd put my money on solar energy… I hope we don't have to wait 'til oil
> and coal run out before we tackle that."
>
> —Thomas Edison
>
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-- 
Jason Lombard
Open Hand Solar LLC.
Certified Sustainable Building Adviser
www.openhandsolar.com
505 795 8646

"I'd put my money on solar energy… I hope we don't have to wait 'til oil and
coal run out before we tackle that."

—Thomas Edison
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