Interesting. I am going to look into that. We are manually stopping the generator (the BMS kills the two-wire start signal). I don't think the AC2 transfer time matters much in terms of solving the clients complaints, but I will play with that also.
Thanks! On Wed, Apr 22, 2020 at 8:18 AM Tump <t...@swnl.net> wrote: > KISS…. have you checked the low voltage setting on AC2? Make sure that is > is not set to the default settings. AC Transfer time? I set to > the lowest time, I believe its 1. > You also have 4 inverters what IS the charge setting of these units? "Gen > assist" enabled? > Info from Schneider engineer below; > The AGS will cause XW+ to disconnect the generator when a stop signal is > sent (Auto Stop) for the generator cool down period (user > adjustable-AGS>Advanced Settings>Cfg Gen). If you are just manually > stopping the generator, then it is possible for the XW+ to stay connected > all the way down to 80V unless you increase that low AC value in > XW+>Advanced Settings>AC Settings menu. *AC2 transfer time may also be > adjusted (default is 40s) using Combox, Gateway or Config Tool. This is > the time it takes to switch from gen to inverting. * > Hope that helps, > Eric > > On Apr 21, 2020, at 4:27 PM, Jason Szumlanski < > ja...@floridasolardesigngroup.com> wrote: > > The issue is during switching only. During inverter operation everything > is silky smooth. During generator operation things are mostly smooth, but > large loads that come on or off during heavy charging can cause some > surging, but that is more a function of a junky generator (which was just > replaced with a better unit). > > So the natural conclusion by the client is let's just run on > battery/inverter all the time. And it does make sense. And it's his money. > > > > > <https://mailtrack.io/trace/link/66033386a2a45137f2b120abb405cca4e927d183?url=http%3A%2F%2Fwww.floridasolardesigngroup.com%2F&userId=1613865&signature=4f411814c62fe532> > *Jason Szumlanski* > Principal Solar Designer | Florida Solar Design Group > (239) 491-8010 (239) 410-4985 > www.FloridaSolarDesignGroup.com > <https://mailtrack.io/trace/link/820314f28a259bd71c900c3d37295758887d5c04?url=http%3A%2F%2Fwww.FloridaSolarDesignGroup.com&userId=1613865&signature=a8e03312019dcafc> > [image: Facebook] > <https://mailtrack.io/trace/link/07e1e531a45de497a46be66e6fd5ef0d301cb2b6?url=https%3A%2F%2Fwww.facebook.com%2Ffloridasolardesigngroup&userId=1613865&signature=8fc87785daeb6626> > [image: > Twitter] > <https://mailtrack.io/trace/link/650dd5b2dbef8e11b3a7fe576865160d8faa8e0a?url=https%3A%2F%2Ftwitter.com%2FFloridaSolarDG&userId=1613865&signature=8a8fc1a336f4dfb7> > [image: > Youtube] > <https://mailtrack.io/trace/link/05be406956337ef2c9e2a768972030fdda96636b?url=https%3A%2F%2Fwww.youtube.com%2Fchannel%2FUCjnsYt5r7DNJD3ZnqI10j8g&userId=1613865&signature=238dfb7609b42168> > > > > On Tue, Apr 21, 2020 at 2:29 PM Ray <r...@solarray.com> wrote: > >> Are you sure its just the transfer switching causing problems? I've seen >> quite a bit of lights dimming, flickering, and strangeness with XW >> inverters ( and many others) just in normal operation. Certain LEDs are >> particularly sensitive, just another appliance coming on can cause >> noticeable flicker that bothers some clients. Our solution was to try >> different brands of LEDs till we found ones that had less trouble. I >> recall the Phillips ones being good, but you would have to test a few to >> see. >> >> Ray Walters >> Remote Solar >> 303 505-8760 >> >> On 4/21/20 12:26 PM, Jason Szumlanski wrote: >> >> I have not looked into that, but the problem also exists >> transferring from inverter to generator. The owner wants "clean" power all >> the time, and just keeping him on inverter power all the time would be a >> solution. >> >> >> >> >> On Tue, Apr 21, 2020 at 9:35 AM Tump <t...@swnl.net> wrote: >> >>> Have you shortened the transfer time from gen to inv, voltage “cut >>> out"acceptance of the gen in power instead of their 90Vac to say 110V/L ? >>> Raising the output voltage on the 6848s & gen set for VD/voltage sag issues >>> under heavy loading? Watch this as sometimes under heavy loading it will >>> cut the AC input. I use the config tool to address this kind of issue, >>> gives me a bit more control. >>> I have a client that has a large external battery charger similar to a >>> fork truck unit that he alleges causes "dirty power" while the genset is >>> supplying power to the charger, w/o charging thru the inverters. >>> Unfortunately w/ the virus I have yet to confirm. >>> >>> On Apr 21, 2020, at 8:27 AM, Jason Szumlanski < >>> ja...@floridasolardesigngroup.com> wrote: >>> >>> I actually need 400Adc at 51V nominal of total charge rate. I was hoping >>> to use 100Adc chargers for redundancy, or some combination of 2-8 chargers >>> to reach the needed current, assuming they can be synced up. I don't think >>> the charging algorithm needs to be complicated. We are basically bulk >>> charging the LiPOs to 80% with the battery BMS controlling the generator. >>> The concept is to get to 80% sometime in the night and solar kicks in >>> during the day to reach 100% using 2-stage charging from the XW charge >>> controllers. >>> >>> The problem I have is the quad XW6048s in the system run at a pretty >>> good load typically... often over 50%. This is off-grid with generator >>> backup. The transfer switches in the XW6048 are causing surges and >>> brownouts when the switched loads are high, especially smart dimmers and >>> televisions. I need seamless power for this client. My thought is to >>> abandon the internal chargers in the XW6048s and just run loads off >>> inverter power full-time. I would charge the batteries with external >>> battery chargers. The tricky part is how to adjust the charge rate based on >>> load, and also based on solar input. I need to limit the net charging >>> current. Of course, I still need 400Adc of charging current, which I'm >>> learning might be hard to find. I don't really want to buy four more XWs - >>> that's a pretty expensive solution. >>> >>> Jason Szumlanski >>> Florida Solar Design Group >>> >>> >>> On Fri, Apr 17, 2020 at 4:26 PM Dave Angelini Offgrid Solar < >>> offgridso...@sti.net> wrote: >>> >>>> I use the CSW 4048. It has a 50 amp charger. A good spare for clients. >>>> Get 2 of them. Repurpose an old Radian or XW well over 100A. XW+ is 140adc. >>>> >>>> *Dave Angelini Offgrid Solar* >>>> >>>> *"we go where powerlines don't" >>>> http://members.sti.net/offgridsolar/ >>>> <https://mailtrack.io/trace/link/290c2833767afa7e7c0b639ab4d233b97fddd564?url=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F&userId=1613865&signature=e52be68029129b4f> >>>> e-mail offgridso...@sti.net <offgridso...@sti.net> >>>> text 209 813 0060* >>>> >>>> On Fri, 17 Apr 2020 14:21:14 -0400, Jason Szumlanski < >>>> ja...@floridasolardesigngroup.com> wrote: >>>> >>>> I'm looking for a standalone 51V nominal battery charger suitable for a >>>> LiPO battery with 2-stage charging and adjustable setpoints for max current >>>> and battery voltage. It would require dual chargers with 100A capacity (I >>>> want dual chargers for redundancy so I have at least 50% capacity if one >>>> goes bad). Ideally they would sync up so they change stages simultaneously, >>>> but I'm not sure if that's really important. >>>> >>>> Who makes something like that? >>>> >>>> Jason Szumlanski >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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 >>>> <https://mailtrack.io/trace/link/2c8383435a52be99ea6f1adaf9dfaa2f1b3fb259?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=59aaebd1c76f9454> >>>> >>>> List-Archive: >>>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >>>> <https://mailtrack.io/trace/link/8f98d67ae7b562b5855cb7cc6f1cb42e11a50a99?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&userId=1613865&signature=d07f36493c98b97b> 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