What about large stacks of telecom style rectifiers with the output tuned to the desired absorb voltage? Very scalable but I'm not sure how the costs would compare...
On Thu, Dec 2, 2021 at 1:46 PM Michael Morningstar <mjmornings...@gmail.com> wrote: > I’m currently building a similar sized system (a bit larger), so I know > what the costs are for such scale. Seems like 6-9 SolArks or XWpros for > dedicated closed loop charging only wouldn’t be unreasonable? > > If an equally sized battery charger exists it would be a monstrosity! > > > > On Dec 2, 2021, at 7:53 AM, Jay <jay.pe...@gmail.com> wrote: > > Hi all > > Sorry I guess I didn’t explain the clients wants well enough > > 1. 90-100kwh+ 48 vdc lithium battery > 2. 208 3 phase AC generator powering 48v nominal battery chargers. > 208-3phase as that is the house/EE design voltage. > 3. AC generator because it’s back up if the inverters fail, so no DC > generator. > 4. Client doesn’t want any drop outs or have to reset clocks etc during > generator/inverter- charging/switchover. > 5. Inverter size is not decided yet, probably 40-80kw. > 6. Generator size isn’t specified yet, but given the loads 60-125kw > probably. > Size would be based on battery charging or max ac load which ever is > larger. > > That leads me external chargers. > > I’m looking for large programmable battery chargers for lithium batteries > powered from a 208-3phase ac generator in the 60-125 kw size range. > > Thanks > > Jay > > > > > > > On Dec 2, 2021, at 6:56 AM, MDElectricSolar <mdelectricso...@gmail.com> > wrote: > > Maybe a DC output generator, the Wildcat Maverick charges a 48v battery > bank directly and has it’s own controls, independent from the inverter. > > https://wildcatpowergen.com/pages/maverick > > Michael D Nelson > MD Electric & Solar, Inc. > 707-684-0064 mobile > 707-884-1862 office > www.mdelectricsolar.com > www.facebook.com/mdelectricandsolar > > > On Dec 2, 2021, at 6:27 AM, Mac Lewis <maclew...@gmail.com> wrote: > > > Hi Jay, > > Is the plan to feed DC current (from generator and grid) into the > batteries and keep the inverters as power source for loads? > > On Thu, Dec 2, 2021 at 6:30 AM Darryl Thayer <darylsol...@gmail.com> > wrote: > >> Jay I am confused as usual, what are the loads? AC or DC? How are you >> charging the battery from the generator or how is the battery powering the >> loads? What is the desired current or the size of the generator? sorry >> if this I dumb question >> >> On Wed, Dec 1, 2021 at 2:23 PM Jay <jay.pe...@gmail.com> wrote: >> >>> I got a call from a colleague that is designing a very large roughly >>> 90-100 kWh lithium battery at 48v. >>> >>> He’s looking for large AC chargers to charge this bank. The reason is >>> total elimination of switch over delay from inverter to generator and back. >>> >>> One technique is to use inverters for this, but pretty pricey. >>> >>> Any recommendations as to equipment, brands etc? >>> >>> It would be a 208 3 phase AC side powered by a generator. >>> >>> Thx >>> Jay >>> >>> Peltz power. >>> _______________________________________________ >>> 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 >>> >>> _______________________________________________ >> 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 >> >> > > -- > > > > Mac Lewis > > *"Yo solo sé que no sé nada." -Sócrates* > _______________________________________________ > 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 > > _______________________________________________ > 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 > > _______________________________________________ > 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 > > > > > > *Michael **Morningstar* > > * Morningstar Electric* > PO Box 1494 > Mount Shasta, California 96067 > 530-921-0560 > CSLB 949635 > > > > _______________________________________________ > 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 > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
_______________________________________________ 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
