Anyone have any experience with the SMA Sunny Boy Storage for this application? Li+ compatible, HVDC bus, black-start capable... looks like no generator input though. I wonder how well it works when AC coupled with with non-SMA inverters.
*Regards, * *Andrew Truitt* www.dr.ventures d: 202.486.7507 NABCEP Certified PV Installation Professional ID: 032407-66 Colorado Journeyman Electrician License No.: 600132 [image: Logo] "Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless!" ~William McDonough On Thu, Sep 13, 2018 at 6:21 AM Will White <w...@solarenergy.org> wrote: > I agree with everything Ray has said when you're using a system with > lead-acid batteries, however this doesn't apply to lithium-ion. Li > batteries don't need multistage charging like LA batteries do so they would > be a perfect fit for a retro-fit battery backup system that can only bulk > charge. > > I'd also suggest people check out the Enphase IQ8 system which allows the > inverters to operate without the grid with no storage. They should also be > able to black start an AC coupled system with no grid unlike other AC > coupled designs. I haven't seen it in person but two of my co-workers > toured their demo project and it seems to live up to everything Enphase is > claiming. > > Thanks, > Will > > On Wed, Sep 12, 2018 at 8:38 PM Ray <r...@solarray.com> wrote: > >> I didn't watch the whole thing, but it looked like a standard AC couple >> set up with an Outback Radian. My understanding is that Outback no longer >> supports AC Coupling, BTW. I would never use that for an off grid system >> or for longer outages. In a very brief explanation, it essentially >> bypasses any charge controlling to the batteries, and puts full Array power >> into the batteries until a relay (or phase shifting) disconnects the >> array. No three stage charging, no taper charging, no float, no temp >> compensation. Its like trying to fill a 5 gal bucket with a fire house, or >> drive a car with a throttle that's either off or at full throttle, no in >> between. The other issue is that if the batteries get low and the inverter >> shuts off, the system will not recharge, and after a couple of weeks the >> batteries will be sulfated beyond recovery. >> >> My guess is that manus that advocated this approach got into trouble from >> end users that fried expensive battery banks during longer outages. I >> would consider it the equivalent of cheap backup generators: a great backup >> system for folks that don't need it. There are probably thousands of >> those out there with happy customers and installers, because its never >> actually been used for more than a few hours, and the batteries are >> properly charged from the grid 99.8% of the time. >> >> Ray Walters >> Remote Solar >> 303 505-8760 >> >> On 9/12/18 6:11 PM, Ken Schaal wrote: >> >> https://www.youtube.com/watch?v=eyhkIfS5Z-Q >> >> >> _______________________________________________ >> 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 >> >> > > -- > *Will White* > Curriculum Developer > > > e: w...@solarenergy.org > w: www.solarenergy.org > p: 802-272-3092 > > PV Installation Professional > # 093006-34 > > *FACT: If we covered 0.33% of the earth with solar panels, we could power > the world with renewable energy.* > > Do you envision a world powered by renewable energy? Be the change > <http://solarenergy.org/donate>. > _______________________________________________ > 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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