Wrenches There is a guy that has parts and boards for the SW4048 Inverters, l may have got the name from this list, l will post it if there is any interest Jerry
On Tue, Dec 24, 2019, 5:09 PM <d...@energysolarnow.com> wrote: > Hi Dave > Your experience here closely resembles mine on at least two jobs with > these inverters. > When the AC1in light blinks the inverter is no longer connected to the > grid. The loads are running off battery power, but this will be short term > in winter weather. I have a VFXR3648A in my truck now to replace an SW4048 > that has lost the ability to connect to the grid. It killed the batteries > in rainy weather, so they are being replaced as well. > > If you set the terminals of your meter from the AC1 input to the Load > output you will see the voltage phase difference. If they are in phase the > voltage difference is zero. In my case this voltage drifts from 0 to 240 > over a period of 15 secs or so, indicating the lack of sync. I have not > found anyone who repairs these old modified square wave inverters. The old > SW4048 should still be good for off grid use. > If anyone wants it let me know. Located in Bolinas, CA. > At least I can go surfing after service calls there.... > > Don Barch > Energy Solar > > > -------- Original Message -------- > Subject: RE-wrenches Digest, Vol 12, Issue 362 > From: re-wrenches-requ...@lists.re-wrenches.org > Date: Tue, December 24, 2019 2:34 pm > To: re-wrenches@lists.re-wrenches.org > > Send RE-wrenches mailing list submissions to > re-wrenches@lists.re-wrenches.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org > or, via email, send a message with subject or body 'help' to > re-wrenches-requ...@lists.re-wrenches.org > > You can reach the person managing the list at > re-wrenches-ow...@lists.re-wrenches.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of RE-wrenches digest..." > > > When responding to posts within the Digest, be sure to restore the > Subject: line to the original, and please edit out any extraneous lines > from the quoted message. > > > Today's Topics: > > 1. Re: Xantrex SW 4048 grid tie mystery (Dave Tedeyan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 24 Dec 2019 15:14:18 -0500 > From: Dave Tedeyan <dtede...@taitem.com> > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > Subject: Re: [RE-wrenches] Xantrex SW 4048 grid tie mystery > Message-ID: > <ca+cq0bvfmczx5vakqo-1vhztqadvsob42hkg1--7no9emrr...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi All, > So I went back today and updated all the programming. There was actually > lots of sun too (a rare event in upstate NY this time of year)! > > The inverters have not yet had any issues with powering the backed up loads > so far. But there have been issues with selling back to the grid. One > inverter was selling just fine, with the sell current right around the max > sell setting. The other inverter would very quickly ramp up its sell and go > way past the setting (set at 30A) and start selling at up to about 60A, and > then would stop selling (but continue to power the backed up loads. When > selling, the AC1 in good light would stay on green solid. Then when the one > inverter would stop selling, that light would flash. Then 5 minutes or so > later, it would click a bunch of times, start selling, and within about 10 > seconds overshoot the setting again and kick off. > > I tried Tumps suggestion of removing the black jumper. When I did that in > each inverter, neither one would sell, but they would continue to power the > backed up loads. > > I also tried bypassing the GTI on the inverter that was having selling > issues. When I did that, the AC1 in good light never came on at all, even > though I verified AC voltage on the input. It never started selling, but it > would at least continue to power the backed up loads. I only had it like > this for about 15 minutes before I had to leave the site, so will be > checking in on the system in the coming days. Last time I was there and > fired it up, it worked fine to begin with and it was not until many hours > later that the issues with powering the backed up loads started appearing. > > Cheers, > Dave > > *Dave Tedeyan, PE* > Senior Engineer | Taitem Engineering, PC > > 110 South Albany Street | Ithaca, NY 14850 > o. *607.277.1118 x121* f. 607.277.2119 > www.taitem.com > > Solar ? Sustainability ? Energy ? Design > Certified B-Corporation since 2013 > > > On Sun, Dec 22, 2019 at 5:11 PM b...@midnitesolar.com <b...@midnitesolar.com > > > wrote: > > > > > Forgot to say that if the inverters ARE grid tied, then they will NOT > > drift around in phase and will > > > > be synchronized and therefore will stay in sync and be passing through > > from grid to output. > > > > boB > > > > > > > > On 12/22/2019 12:57 AM, Jerry Shafer wrote: > > > > Well l would start simple and get a sync cable and make sure that they > are > > al least staying g in correct phasing, then look closely at the > > programming, look at the grid voltages and settings, take it out of IEEE > > for test purposes only, you might find out you have a board that's out of > > calibration causing the issue but start simple > > Jerry > > > > On Fri, Dec 20, 2019, 9:44 AM Dave Tedeyan <dtede...@taitem.com> wrote: > > > >> Hi All, > >> > >> I am someone's last ditch effort to get their system working which has > >> been non-functional since a few months after installation, 13 years > ago... > >> > >> After getting some new batteries in there, I can at least fire it up. It > >> is a grid tie with battery backup situation with two Xantrex SW4048 > >> inverters. Each inverter is kind of like its own system with two Outback > >> MX60 CC's per inverter, and each inverter powers its own 120V backed up > >> loads panel. They do not see each other until their 60A single pole > >> breakers in the main panel. > >> > >> What seems to be happening is that after turning on the inverters the > AC1 > >> in good light will flash for about 30 seconds, then it syncs up to the > grid > >> and the light stays on solid. But then after a little bit, that light > will > >> start flashing, indicating that the utility power has been dropped, > when it > >> has not actually been dropped. Then at some point the backed up loads > would > >> lose power. The customer says that every 1-10 minutes, they would lose > the > >> backed up loads for 10-90 seconds. This happened all night long until > they > >> bypassed the inverters. > >> > >> There are a few other things of note: > >> 1. There is a Xantrex GTI for each inverter. > >> 2. I see in the manual there is information about stacking the > inverters, > >> but I am guessing in this setup this not necessary or would even be > counter > >> productive to stack the inverters. Not sure if the inverters not being > >> stacked could cause one of them to unsync with the utility? > >> 3. Neutrals and grounds are bonded in their main panel, but also in each > >> of the Xantrex DC breaker boxes. I was going to separate them in the DC > >> breaker boxes, but found that there is no way to isolate the battery > >> negative bus from the box itself, and figured it would be dodgy to > unground > >> the enclosure. So I am also not sure if the multiple N-G bonds could be > >> causing these issues. > >> > >> Does anyone have any ideas? > >> Cheers, > >> Dave > >> > >> *Dave Tedeyan, PE* > >> Senior Engineer | Taitem Engineering, PC > >> > >> 110 South Albany Street | Ithaca, NY 14850 > >> o. *607.277.1118 x121* f. 607.277.2119 > >> www.taitem.com > >> > >> Solar ? Sustainability ? Energy ? Design > >> Certified B-Corporation since 2013 > >> _______________________________________________ > >> 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 > >> > >> > > _______________________________________________ > > 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 > > > > _______________________________________________ > > 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 > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20191224/4dfa8f2d/attachment-0001.html > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > 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 > > > ------------------------------ > > End of RE-wrenches Digest, Vol 12, Issue 362 > ******************************************** > > _______________________________________________ > 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 > >
_______________________________________________ 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
