Wes & all – I want to clarify my prior post If off-grid, the rule of thumb is no more than 2W PV per W of Sunny Island. So that would be up to 46kW PV for 23kW SI capacity – there is no concern of backfeeding the SI relay when off grid, even with generator.
But if grid tied, the relay limit comes into play, and the 26.9kW PV size limit is correct. But to clarify, when grid-tied the SI does not discharge battery to meet load, it lets the grid do that along with PV. Not built for peak shaving! When this setup is in backup mode, then it will provide battery power along with PV to offset load. So it does really depend if this would be an offgrid setup or if the goal is peak shaving for a grid-tied system. Mike SMA America Michael Mahon Technical Trainer, Solar Academy 6020 West Oaks Boulevard, Suite 300 Rocklin, CA 95765 U.S.A. Mobile: +1 916 918 9412 www.SMA-America.com<http://www.sma-america.com/> Solar Academy: https://solaracademy.sma.de/en.html SMA America Solar Academy webinars: https://solaracademy.sma.de/en/courses.html Choose "United States" [cid:image001.jpg@01D5E8C8.E6E8FE30]<http://www.facebook.com/pages/SMA-America/140290312717395>[cid:image002.jpg@01D5E8C8.E6E8FE30]<http://twitter.com/SMA_America> [cid:image003.jpg@01D5E8C8.E6E8FE30] <http://www.smainverted.com/> [Linkedin Logo] <http://www.linkedin.com/company/364675> [cid:image005.jpg@01D5E8C8.E6E8FE30] <http://www.youtube.com/playlist?list=PL840A5336CAC32332> [SMAAFORUM_ICON] <http://smaadvance.com/signup/> [cid:image007.jpg@01D5E8C8.E6E8FE30]<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sma-america.com%2Fpowerup%2Finstaller.html&data=02%7C01%7CMichael.Mahon%40sma-america.com%7C19488d9c48b84303ddbc08d77e8cd1c6%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C0%7C637117015597965454&sdata=wEbm4oer7wM5j7RZzXN5khOa99j6%2F57m4uCqbDtG6DA%3D&reserved=0> This email and any attachments thereto may contain SMA America, LLC confidential, privileged and private material for the sole use of the intended recipient. Any review, copying, or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email and any attachments thereto. Thank you. From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of wes kennedy Sent: Friday, February 21, 2020 2:38 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org>; Jeff Clearwater <je...@villagepowerdesign.com> Subject: Re: [RE-wrenches] High Power Split phase inverter/chargers Hi Jeff, I think the biggest split phase sunny island system is 4 units, so that's 24KW. What do you do for larger systems? Segment the loads? Not always very practical. This latest opportunity is for an agricultural building that peaks at 75KW. -Wes Kennedy 303-653-3073 On Friday, February 21, 2020, 12:47:39 PM MST, Jeff Clearwater <je...@villagepowerdesign.com<mailto:je...@villagepowerdesign.com>> wrote: All of my SMA Sunny Island Sunny Boy AC coupled systems greater than 12 KW have worked flawlessly and delivered reliable power and good monitoring for years. Less excited about my Schneider and Outback systems due to callbacks and hassles. a bit more expensive but worth it IMHO. Hope that helps! Jeff wes kennedy wrote on 2/21/20 9:41 AM: Hi friends, I keep running across opportunities with 50KW-300KW peak load requirements, on split phase services. Big homes, agriculture etc. Outback, Schneider, SMA can all gang/stack into the 30-50KW range, but north of there, I am not finding many (any?) options? Just found Aims Power 50 KW split phase unit with claims of higher power offerings by special order. Even the 50KW unit is $20K, so quite spendy. Any experience with these guys? 50kw - 50,000 WATT DC TO AC PURE SINE POWER INVERTER CHARGER 384 Vdc TO 220/230/240 Vac<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.aimscorp.net%2F50kw-50-000-watt-dc-to-ac-pure-sine-power-inverter-charger-384-vdc.html&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837002896&sdata=2%2BQrNJCOqR6CbgWIW30VGBJFECsuEa9eMVs%2BLfCL8sM%3D&reserved=0> 50kw - 50,000 WATT DC TO AC PURE SINE POWER INVERTER CHARGER 384 Vdc TO ... 50kw - 50,000 WATT DC TO AC PURE SINE POWER INVERTER CHARGER 384 Vdc Split Phase 220/230/240 Thanks for any input! -Wes Kennedy 303-653-3073 on this list since the 90's _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837022884&sdata=d3rrO%2FwsF2xOk%2Fc06mXlGWGKgZAwNcePIETQtMnENow%3D&reserved=0> List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837022884&sdata=X0%2B6Fwf2kfy4fm1tkdFzjBRvmXuNzccqGzMh2fhFc0s%3D&reserved=0> List rules & etiquette: www.re-wrenches.org/etiquette.htm<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837032883&sdata=X%2Fac4TAtXrcziGf0jhnsMOvi6LCuBzulNBatL35FzGA%3D&reserved=0> Check out or update participant bios: www.members.re-wrenches.org<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.members.re-wrenches.org%2F&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837042877&sdata=7sMFSSQL9yLltgJJheiB3gv1387rXuk3zgE0xffXzak%3D&reserved=0> -- ~~~~~~~~~~~ Jeff Clearwater Village Power Design linkedin<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fin%2Fjeff-clearwater-0622a312%2F&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837042877&sdata=vVXspAJKFh4P5yqpvb3YuPCkG%2FE1Nmv9ckCQo0C7nd8%3D&reserved=0> www.villagepowerdesign.com<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.villagepowerdesign.com%2F&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C9b17a515fc3c4935965f08d7b7168f75%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637179179837052871&sdata=XITcRREVH50tMPuiSoRUAQYC73Ue1fKOy82wa%2Fny%2Bcc%3D&reserved=0> cell - 413-559-9763 ~~~~~~~~~~~~~~~~~~~~~~~
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