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/3c165022419c043bf7fae6f8ecf982e3ecc4a1fe?url=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F&userId=1613865&signature=465d0580a80dab11> >> 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/87e7eed38e9919757f199821e1f1b51753af3cb1?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=5ee8402176433da9> >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> <https://mailtrack.io/trace/link/45aed2d671a970abd91ee83e200e9373ed935a5a?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&userId=1613865&signature=2f4f6344e534e2e4> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> <https://mailtrack.io/trace/link/e8496866bc61c192fcee0b1de1be878634272fa5?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=b8be63d2aca26404> >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> <https://mailtrack.io/trace/link/f0dae2dae01e0e6358327e8e3251cc7837ca6e67?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=38f27b2520ac6e44> >> >> _______________________________________________ > 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/dd050ae2c673dd4cd802c37bddbe474318a70102?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=f5f844835e29054a> > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > <https://mailtrack.io/trace/link/0493368bc16bceab5920aa18b24318090756debd?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&userId=1613865&signature=fc66d8aeb73dcca9> > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > <https://mailtrack.io/trace/link/54a0a0a054b3db6f12f95c3d119509afbcc9d907?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=1256f8d4cb1cef4b> > > Check out or update participant bios: > www.members.re-wrenches.org > <https://mailtrack.io/trace/link/add324be80479a0f6a3e9ad751810fe121f72acc?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=d2f278a758a9f1f6> > > > *t...@swnl.net* *www.SWNL.net* > Solarwinds Northernlights > * Serving Mid Coast Maine & Northern California* > * 207-832-7574 Cl. > 610-517-8401 * > *Blair "TUMP" May* > > > * ******** MAINE'S CHARTER ******** * * > NABCEP "Certified PV Installer"* > > > * ******** MAINE'S CHARTER ******** ** > Trace Xantrex "Certified" Dealer / Installer"* > > > > _______________________________________________ > 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/034e10172e75c7776537720aa88742289db096e3?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=5104423cdadb7d6d> > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > <https://mailtrack.io/trace/link/e16ea2564076b31906b8100e4de30a434d2af66d?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&userId=1613865&signature=c232e6b5f7e80047> > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > <https://mailtrack.io/trace/link/22a970036140dda9b0f56451058bd6a063248e46?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=74f63fd18f433198> > > Check out or update participant bios: > www.members.re-wrenches.org > <https://mailtrack.io/trace/link/18dc5efffc16498bf2b5b6f68a4edbffcefab7ad?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=4bf5e6fecf6f36a1> > >
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