unknown, I will send an email and ask. On Mon, Feb 9, 2009 at 3:16 PM, Dana <[email protected]> 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 - [email protected] > > 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:* [email protected] [mailto: > [email protected]] *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 > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > -- 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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