The interesting thing to me is that a ton of industrial equipment has regenerative braking that puts power back "on the grid". Lots of things with a frequency drive and a motor that stops has been built this way for 30 years. Things that stop like CNC machines and elevators. Pretty much anything that stops quickly and doesn't have a big braking resistor on it just pumps the power back to the AC side.
In 20 years of owning and running industrial facilities, no utility has ever once had any concern about that. FWIW, -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Tue, Feb 11, 2025 at 4:18 PM Sam Haraldson via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > The utility here in Montana requires any small-generator facility to have > an interconnection agreement with them. A standard net-metered agreement > is called a Level 1 Agreement and a non-export system falls into their > Level 3 Agreement. The relevant text from that agreement is as follows: > > *The... requirements are designed to ensure that the Small Generator > Facility... are designed to prevent back-feeding of power from the > generating facility to the utility grid during power outages, and to > match... power characteristics with respect to voltage and frequency.* > > Cheers, > Sam > > [image: OnSite Energy] > <https://www.google.com/url?q=https://onsiteenergyinc.com/&source=gmail-html&ust=1677085494759000&usg=AOvVaw2NN36GoM1sjnS4RdC8Svt-> > > SAM HARALDSON > Operations Specialist > (406) 551-6135 > 1515 N. Rouse Ave Bozeman, MT 59715 > Locally owned and operated since 2012 > [image: B Corporation] <https://onsiteenergyinc.com/bcorp> > _______________________________________________ > 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 > >
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