I believe that when you have a TL inverter that has two channels you may have up to two strings, unfused, going into each channel. Thus leaving you with four strings of modules with no fusing.
Mike Kocsmiersky Principal Phone: 413 883-3144 Spirit Solar www.SpiritSolar.net From: Jerry Shafer [mailto:jerrysgarag...@gmail.com] Sent: Friday, January 29, 2016 6:07 PM To: RE-wrenches Subject: Re: [RE-wrenches] DC Fuses on TL Inverters Wrenches We have been installing combiners with anything more then 1 string on the TL inverters. Troubleshooting is better with a remote combiner, its seems a waist but all our inspectors to like to see it also. On Jan 29, 2016 10:36 AM, "Mark Byington" <ma...@cobaltpower.com> wrote: "Transformerless inverters need fuses on both DC positive and DC negative legs to protect the inverter in case of ground fault." I could be wrong, but my understanding is that TL inverters are no different than transformer type inverters in terms of DC fusing requirements - no fuse required for one or two strings in parallel; fuses required on + and - leads for 3 or more strings in parallel. Mark Byington Cobalt Power Systems, Inc. _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
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