Hi william The technic I use is to build or buy custom lengths of jumpers. Then I can mount the MLPE exactly as I want with the wire routing to my preference.
Yes it’s the most expensive route: more wire, more clips, but also the cleanest. And often the MLPE don’t have the same connectors as the panels which require adapters anyway. Jay > On Mar 25, 2022, at 4:56 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. > > 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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