just a thought, when trying to parallel 4 XW inverters several years ago, the problem arose with paralleling the internal relays, going from grid to back up power and back, burning the contacts. If you truly want 60 kW or close you need 9 or 10 XWs in parallel. Outback uses the same relay. Is your project 3 phase?
On the batteries, the max anyone talks about on discharge of Li-ion is 2 hr. suggesting a120 kWh battery for a 60 kW inverter. On Fri, Jan 11, 2019 at 1:37 PM August Goers <aug...@luminalt.com> wrote: > Hi Jay - The battery kW rating isn't necessarily set. Assuming a 60 kW-DC > PV system, we might have about ~50 kW (or a bit more) of PV inverter rating > so I'd by default match the battery inverter rating to that (about 50 kW) > if it was AC coupled. If, for example, we go with four SMA 6048-US Sunny > Islands as our constraint then we might need to split up some of the PV to > be solely grid tied. Long story short, I'm not sure yet. > > August > > > On Fri, Jan 11, 2019 at 10:09 AM Jay <jay.pe...@gmail.com> wrote: > >> Hi August >> Did you tell us how many kW of battery inverter you needed? >> >> Jay >> >> On Jan 11, 2019, at 6:40 AM, August Goers <aug...@luminalt.com> wrote: >> >> Thanks All for the ideas. For the battery inverters, I'm most interested >> in sticking with SMA or Schneider which I've had good experience with in >> the past. Over the past year and a half our experience has been focused on >> the Tesla Powerwall with SGIP <http://www.cpuc.ca.gov/sgip/> incentivized >> projects. Tesla is now allowing up to ten Powerwalls per Gateway which is >> about 135 kWh of storage - more than enough for most folks! But this >> particular client doesn't want Tesla and insists on wanting more the 200 >> kWh of storage. As many of your know, SGIP is not for backup purposes but >> rather for advanced grid support functionality. I'm curious whether we can >> program with Schneider XW to meet SGIP requirements and I've been under the >> impression that we can't with the SMA Sunny Island. Regardless, it might be >> easiest to just program the inverters for backup only operation and just >> skip the SGIP all together. >> >> Best, August >> >> >> On Thu, Jan 10, 2019 at 7:17 PM Darryl Thayer <darylsol...@gmail.com> >> wrote: >> >>> Hi, my supplier, just today introduced us to a new product they are >>> selling. This is Werner Electric supply in MN the product is Energport >>> i...@energport.com or www.energport.com They have models up to 60 kW >>> and 120 kWh >>> >>> >>> >>> >>> On Tue, Jan 8, 2019 at 2:49 PM August Goers <aug...@luminalt.com> wrote: >>> >>>> Hi Wrenches, >>>> >>>> We have a new potential client who wants a 60 kW PV system and a >>>> battery backup system with 200 kWh of storage. The system will be grid tied >>>> and the client insists on some sort of lithium battery technology and >>>> doesn't want Tesla. For such a ridiculously large system, what kind of >>>> equipment would you recommend? I'm thinking maybe Sunny Islands with Blue >>>> Ion LiFePO4 batteries? >>>> >>>> Best, August >>>> >>>> *August Goers* >>>> >>>> Luminalt Energy Corporation >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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 >> >> _______________________________________________ >> 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 > >
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