Ray The Outback does not dump load it drops inverter string (s) instead Jerry
On Mon, Aug 17, 2015 at 5:26 PM, Ray Walters <[email protected]> wrote: > Yes, we're definitely planning a battery based inverter. The real trouble > is when the generator is charging, its AC power passes through to the loads > and hence to the Enphase inverters. > Also I agree with the other poster about Outback being more cost > effective. I just took a look at their Remote Operated Circuit Breaker > (ROCB) and this looks like a good option. > I've done dump loads before, and never found that to be an elegant > solution. Any other options I should be looking at? > > Thanks, > > R.Ray Walters > CTO, Solarray, Inc > Nabcep Certified PV Installer, > Licensed Master Electrician > Solar Design Engineer303 505-8760 > > On 8/17/2015 8:36 PM, Jerry Shafer wrote: > > I cant see this working well without some battery based inverter > Jerry > On Aug 17, 2015 10:10 AM, "Ray Walters" <[email protected]> wrote: > >> HI Esteemed Wrenches: >> >> I am consulting on a system I have never seen, that consists of a 6.7Kw >> Enphase roof mounted system, and 2 backup generators. Each generator has >> an automatic 200 amp transfer switch to back up its own 200 amp panel. >> Both 200 amp panels are fed by a 400 amp service from the grid. >> The Enphase PV backfeeds a subpanel in another building which then is fed >> by a 2 pole 60 amp breaker in one of the 200 amp panels. >> Currently they are having issues with the generators kicking out because >> of the Enphase inverters. That part I understand: you can't backfeed a >> generator, or its voltage regulation freaks out. >> >> Now we get to the fun part: they want to create a third critical load >> subpanel with loads selected from both 200 amp panels to be powered by >> batteries and an inverter. >> I am considering the Sunny Island since it makes the most sense with its >> ability to signal the Enphase inverters to shut off when the batteries are >> full. I also see this as a partial solution to the generator issue, since >> normally the Enphase will be connected to the output side of the Sunny >> Island. However, when the generator is used to charge, we will be back to >> directly coupling the generator output to the Enphase. >> >> Here are some possible solutions I'm considering: >> 1) Use a separate charger for the generator so that it will only feed DC >> to the batteries, and not be AC coupled. >> 2) convert the PV back to DC with charge controllers, but that would >> involve ditching and adding another conduit run between buildings. >> 3) Put the Enphase PV on a relay that would disconnect the PV when >> charging with the generator. >> 4) Something I haven't thought of that one of you clever folks can >> suggest...... >> >> As always, thanks in advance for all you responses, >> >> -- >> R.Ray Walters >> CTO, Solarray, Inc >> Nabcep Certified PV Installer, >> Licensed Master Electrician >> Solar Design Engineer >> 303 505-8760 >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/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: [email protected] > > Change listserver email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/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: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/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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