William We have found fire raptor better suited for our roof mounted off grid or back up systems what modules are you specing and what inverter Solark or Outback. I have seen arc fault shut down the CC on the OB and inverter on the Solark, none of the faulted systems had Fire Raptor used but beware it can still happen with most RSD's Jerry
On Fri, Mar 25, 2022, 3:56 PM William Miller via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Friends: > > > > I have been designing a large-ish off-grid system over the last few > weeks. This will be our first off-grid system to require MLRSS. We chose > the Tigo TS4-A-F system. > > > > In order to make certain the Tigo will work with modules that we can get > our hands on, we brought in a few samples to try and connect with the > Tigos. What we found is that with many of the new PV panels, the leads > connect to the two long sides of the panels and are often too short to > practically route to the frame-mounted Tigos. > > > > This got me to thinking: Many panels are now configured with leads > connected to the two long sides. Many new panels are coming out with > shorter leads. Virtually all new roof-mounted installation will need some > form of MLPE. These new panels will be ill-suited to connect to those MLPE > devices. > > > > This has to do with the fact that instead of in the old days, when each > panel connected to a neighbor on either side, each panel now connects to a > single device, the MLPE. The leads must able to reach that MLPE without > being pulled, banjo-string-tight across a void. If PV leads cannot be > supported, they will end of laying on the roof. Can we agree that is a bad > thing? > > > > Have any of you consider this situation? It is kind of complicated and > hard to explain. I attempted to do so by writing a web page dedicated to > the subject. I finished the site today but I am not sure it communicates > the dilemma adequately. You can find it here > <https://millersolar.com/MillerSolar/case_studies/31-Module_leads/Module_leads.html> > . > > > > I would be most grateful if some of you more experienced installers could > look this over and let me know if this problem has come across your radar > and what you are doing about this issue. > > > > Thanks in advance. > > > > William Miller > > > > Miller Solar > > 17395 Oak Road, Atascadero, CA 93422 > > 805-438-5600 > > www.millersolar.com > > CA Lic. 773985 > > > > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > 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 > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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