Re: [RE-wrenches] Grid-Tie Upgrade Problem

[Allan Sindelar]

Mick, I appreciate the suggestion, but that's part of why I overlooked the problem that led to this request: The current BP115s and 125s are 12V modules, similar to the Kyoceras. The old SX120s are 24V - likely 72 MSX60 cells in a larger frame - which I need to get the voltage up for the Sunny Boy. Besides, all Conergy really has in BP modules are some 10W. Thanks, Allan Allan Sindelar Allan@positiveenergysolar.com NABCEP Certified Photovoltaic Installer EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com Mick Abraham wrote: Conergy dealernet is showing BP 115's & 125's. Check that and Allan kindly write me off list if you find those are indeed available/priceable from Conergy. I need to series/match some Kyocera 120's so those might work...if they're priced right. Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675 On Thu, Feb 18, 2010 at 10:38 AM, Warren Lauzon <wind...@wind-sun.com> wrote: The Vmp of those is 33.7 volts, so what you might want to do is just come up with a set of panels that would equal 10 of the SX120's within 5% or less. As I recall, the SX120's had a rather poor temperature coefficient compared to todays panels, so that might be hard to match up.     .................................................................................................. Northern Arizona Wind & Sun - Electricity From The Sun Since 1979 Solar Discussion Forum: http://www.wind-sun.com/ForumVB/ .................................................................................................. ----- Original Message ----- From: Allan Sindelar To: RE-wrenches Sent: Thursday, February 18, 2010 8:07 AM Subject: [RE-wrenches] Grid-Tie Upgrade Problem Fellow Wrenches, One of our first batteryless grid-tied installations needs an upgrade and I need to ask this list for suggestions re how it might be done. In late 2001 we installed two poles in the ground at a home. On one pole we mounted ten BP SX120s on a dual-axis Wattsun tracker. Input fed an SMA SB2500 inverter. The idea was that we would install 1/2 of the system then (what the customer could afford), with the infrastructure in place to add a second tracked array later. The system has worked flawlessly since then. Nine years (!) later the customer wants to add to the system, and I'd like to use the original approach if at all possible. We can fit up to around 1500 watts onto the existing inverter, but it must be in the form of ten 72-cell modules of similar Vmp, temperature deration coefficient, and fill factor. I am imagining ten 150W 24Vnom polycrystalline modules, but I don't know of any currently made. I thought it would be easy - ten Kyocera KC130s or KD135s, until a coworker pointed out that these are 12V modules - duh... Any suggested solutions out there? Thank you, Allan -- <![endif]--> Allan Sindelar Allan@positiveenergysolar.com NABCEP Certified Photovoltaic Installer EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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

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