You may have to educate these people about what happens once the sun goes down. It does sound like a good way damage electronics (loads) if not done perfectly!
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ [1] e-mail [email protected] [2] text 209 813 0060 On Wed, 2 Jun 2021 16:58:00 -0400, Jason Szumlanski wrote: Maybe it's time for a change of thinking in the resi market. People who consider PV and can't have it used for backup get disenfranchised quickly. On Wed, Jun 2, 2021, 3:52 PM Jeff Clearwater wrote: As Jay says SMA has the Fuel Save Controller for large PV to Diesel hybrid systems - with or without batteries. https://www.sma.de/en/industrial-systems/fuel-save-solution-for-hybrid-systems.html So no reason it can't be done on a smaller scale. Best, Jeff Village Power Design Jason Szumlanski [4] June 1, 2021 at 3:51 AM I'm wondering why this isn't more common and better documented. We are getting a lot of requests for solar to reduce generator fuel usage with PV in smaller residential settings. I just came across this solution from Fronius: https://www.fronius.com/en/solar-energy/installers-partners/products-solutions/offgrid-backup/pv-genset-saving-fuels-with-photovoltaics. [5] Jason Szumlanski Florida Solar Design Group _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org [6] List Address: [email protected] [7] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org [8] There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/[email protected]/ [9] http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org [10] List rules "> Jay [13] May 25, 2021 at 4:16 PM Installing PV/inverters to a generator is a common practice. One must make sure you don't ever have more PV/inverter than load to prevent either generator damage or shut down. I worked on a big project that did actually shut the generator down, it tried to run backwards as the PV power exceeded the load. Didn't damage the generator, 125kw. The main reason is to reduce fuel burn, but how how it is reduced has a number of variables: age, fuel type, size, where in the power band it's operating , and if a larger newer diesel ( they have a very different fuel burn curve than older ones are which works very well with solar). SMA and others have full packages that communicate with the generator for really large systems like mines etc. Not knowing the size/type of the PV/generator and the variables, hard to say if there would be much fuel savings. Jay _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org [14] List Address: [email protected] [15] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org [16] There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/[email protected]/ [17] http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org [18] List rules "> Jerry Shafer [21] May 25, 2021 at 9:28 AM Not kidding, but not in reference of wildfires either. Installing inverters directly connected to the gennys is in the past lead to smoke. 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