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. <https://mailtrack.io/trace/link/7c491c267a60aecbda5c36da8e23e64a94576133?url=https%3A%2F%2Fwww.fronius.com%2Fen%2Fsolar-energy%2Finstallers-partners%2Fproducts-solutions%2Foffgrid-backup%2Fpv-genset-saving-fuels-with-photovoltaics.&userId=1613865&signature=86c145b44a7c38ec> Jason Szumlanski Florida Solar Design Group On Tue, May 25, 2021 at 8:24 PM Jay <[email protected]> wrote: > 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 > > > > On May 25, 2021, at 9:29 AM, Jerry Shafer <[email protected]> > wrote: > > > Not kidding, but not in reference of wildfires either. Installing > inverters directly connected to the gennys is in the past lead to smoke. > Jerry > > On Tue, May 25, 2021, 8:33 AM Dave Angelini Offgrid Solar < > [email protected]> wrote: > >> In case you are near me and not kidding Jerry, I see smoke alot of it! >> For others during fire season this is the tool I use for finding the fire >> source. Much faster than anything else I have tried. The upper right of the >> display shows a red area that is the fire. >> >> >> https://caltopo.com/map.html#ll=37.62021,-119.98856&z=10&b=mbt&a=modis_vp%2Cgoesfire >> >> <https://mailtrack.io/trace/link/0f624219738aa7b61b47b673e4f742d7902fdf08?url=https%3A%2F%2Fcaltopo.com%2Fmap.html%23ll%3D37.62021%2C-119.98856%26z%3D10%26b%3Dmbt%26a%3Dmodis_vp%252Cgoesfire&userId=1613865&signature=2c1e016008fceb93> >> >> Sorry Jason! I will look at your link. >> >> *Dave Angelini Offgrid Solar >> "we go where powerlines don't" >> http://members.sti.net/offgridsolar/ >> <https://mailtrack.io/trace/link/3cf97a2179f6a433f0fe88d900e8deb3fd5cce42?url=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F&userId=1613865&signature=996b1717d69c931a> >> e-mail [email protected] <[email protected]> >> text 209 813 0060* >> >> On Tue, 25 May 2021 08:22:51 -0700, Jerry Shafer < >> [email protected]> wrote: >> >> I can smell smoke from here >> >> >> On Tue, May 25, 2021, 6:48 AM Jason Szumlanski < >> [email protected]> wrote: >> >>> >>> Has anyone tried to AC couple these microinverters with a generator >>> output to reduce fuel consumption? They claim it can be done with their >>> "volt-watt" mode. 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