Lee,
Your idea about 2 strings of 16 is fine on a Fronius IG2000. The voltage is correct and the inverter power is more than sufficient. There is no difference at all in the way module bypass diodes were done then (early 1990s) as now. You want to check the Voc of each module to make sure there are no failures, but beyond that, everything else is the same. They are not on the CEC list because they predate the list. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of David Katz Sent: Wednesday, November 18, 2009 1:28 PM To: RE-wrenches Subject: Re: [RE-wrenches] strings of older solar panels Lee I would be inclined to use groups of 4 modules wired for 24 volts connected to an Enphase inverter. This will give you less problem with mismatch loss. 256 watts is high but they are probably a bit lower in output that that. David David Katz Chief Technical Officer AEE Solar 1155 Redway Drive P.O. Box 339 Redway, CA 95560 Tel (707) 825-1200 Fax (707) 825-1202 dk...@aeesolar.com <mailto:da...@aeesolar.com> www.aeesolar.com <http://www.aeesolar.com/> DISCLAIMER: This communication, along with any documents, files or attachments, is intended for the use of only the addressee and contains privileged and confidential information. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of any information contained in or attached to this communication is strictly prohibited. If you have received this message in error, please notify the sender immediately by e-mail reply and destroy the original communication and its attachments without reading, printing or saving in any manner. Solar Plexus wrote: Hi Wrenches. I have a customer with 32 of the Solarex MSX-64 solar panels an a battery-based system. He wants to go batteryless inverter. So I am looking at 2 strings of 16 in series. But the solar panel spec sheet doesn't say anything about system voltage rating. Can I do this? If one solar panel in the string is shaded, does it see the full string voltage of around 280 volts? Is there something in the way new panels are made that makes them more able to handle this voltage, or is it just that they are now tested for it? My guess is this request may be happenning a fair amount. Is there a reason these panels are not listed on the California GoSolr website? Lee Tavenner Solar Plexus _____ _______________________________________________ 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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