<div dir="ltr">How much opportunity is there really for fuel savings in a residential, back-up power application anyway? <br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><br></div><div>Brian Mehalic <br>NABCEP Certified Solar PV Installation Professional\u2122 R031508-59</div><div>National Electrical CodeŽ CMP-4 Member</div><div>(520) 204-6639<br><div><br></div><div><div><div>Solar Energy International<br><a href="http://www.solarenergy.org" target="_blank">http://www.solarenergy.org</a></div></div></div></div><div><br></div><div>SEI Professional Services</div><div><a href="http://www.seisolarpros.com" target="_blank"><span style="font-size:12.8px">http://www.s</span>eisolarpros.com</a><br></div><div><br></div></div></div></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 2, 2021 at 3:09 PM Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p>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!</p>
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<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
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<p>On Wed, 2 Jun 2021 16:58:00 -0400, Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>> wrote:</p>
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<div dir="auto">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. </div>
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<div class="gmail_attr" dir="ltr">On Wed, Jun 2, 2021, 3:52 PM Jeff Clearwater <<a href="mailto:jeffc@villagepowerdesign.com" target="_blank">jeffc@villagepowerdesign.com</a>> wrote:</div>
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<div>As Jay says SMA has the Fuel Save Controller for large PV to Diesel hybrid systems - with or without batteries. <br> <a href="https://www.sma.de/en/industrial-systems/fuel-save-solution-for-hybrid-systems.html" target="_blank"><br> https://www.sma.de/en/industrial-systems/fuel-save-solution-for-hybrid-systems.html</a><br> <br> So no reason it can't be done on a smaller scale.<br> <br> Best,<br> <br> Jeff<br> Village Power Design<br> <span> </span><br>
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<div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:49%"><a style="padding-right:6px;font-weight:500;color:rgb(72,86,100);text-decoration:none" href="mailto:jason@floridasolardesigngroup.com" target="_blank">Jason Szumlanski</a></div>
<div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:right"><span style="color:rgb(144,154,164)"><span style="padding-left:6px">June 1, 2021 at 3:51 AM</span></span></div>
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<div class="gmail_default" style="font-family:arial,helvetica,sans-serif">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.</div>
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<div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I just came across this solution from Fronius: <a href="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" target="_blank">https://www.fronius.com/en/solar-energy/installers-partners/products-solutions/offgrid-backup/pv-genset-saving-fuels-with-photovoltaics.</a></div>
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<div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Jason Szumlanski</div>
<div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Florida Solar Design Group</div>
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<div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:49%"><a style="padding-right:6px;font-weight:500;color:rgb(72,86,100);text-decoration:none" href="mailto:jay.peltz@gmail.com" target="_blank">Jay</a></div>
<div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:right"><span style="color:rgb(144,154,164)"><span style="padding-left:6px">May 25, 2021 at 4:16 PM</span></span></div>
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<div dir="ltr">Installing PV/inverters to a generator is a common practice. </div>
<div dir="ltr">One must make sure you don't ever have more PV/inverter than load to prevent either generator damage or shut down. </div>
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<div dir="ltr">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. </div>
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<div dir="ltr">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). </div>
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<div dir="ltr">SMA and others have full packages that communicate with the generator for really large systems like mines etc. </div>
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<div dir="ltr">Not knowing the size/type of the PV/generator and the variables, hard to say if there would be much fuel savings. </div>
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<div dir="ltr">Jay</div>
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<div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:right"><span style="color:rgb(144,154,164)"><span style="padding-left:6px">May 25, 2021 at 9:28 AM</span></span></div>
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<div dir="auto">Not kidding, but not in reference of wildfires either. Installing inverters directly connected to the gennys is in the past lead to smoke.
<div dir="auto">Jerry</div>
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