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I have done this with great success also using the Magnum and a Grid Tie wind turbine in place of the solar. once battery bank is full the AE would cause the turbines GT inverter to shutdown because of a UL 1741 setting. Of course a better solution would be to use a dump load.
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<div><br>-- <br>Pine Ridge Products LLC<div>1646 East Highwood Rd</div><div>Belt, MT 59412</div><div><br></div><div>www.pineridgeproducts.com</div><div>www.chinookturbines.com</div><br></div>
<p style="color: #A0A0A8;">On Sunday, October 2, 2011 at 2:03 -Oct 2, Larry Brown wrote:</p>
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<span><div><div>Eric,<br><br>We have had excellent results doing these with Sunny Boys and Sunny <br>Islands. It is more pricey but if you have a high end customer and <br>want a a reliable, trouble free (?) system, we have had no wrinkles or <br>call backs with this approach. We have inverted at the array in the <br>past and sent AC to the critical loads sub panel at the house and from <br>there to the Sunny Islands and then either the main service panel or <br>done a tap between the main service panel and the utility meter. If <br>you do a tap then you need an AC fused disconnect before the tap. But <br>you could also run DC from the array to the house, if it is a new <br>system, and then invert to AC.<br>This is also a good approach if a customer wants to add battery back <br>up to an existing grid tie system. There is some rewiring but it is <br>not at the array. The output of the grid tie inverter in an AC <br>coupled system needs to land in the critical loads sub panel rather <br>than the main service panel where it probably now lands.<br><br>Magnum has a good schematic on their website showing how this is done <br>using a MS-PAE battery based inverter and a grid tie inverter<br><br>Larry Brown<br>Sun Mountain<br>Nabcep Certified PV Installer<br><br><br>On Oct 2, 2011, at 12:15 PM, Eric Thomas wrote:<br><br><blockquote type="cite"><div>Wrenches,<br><br>We are designing a super high end grid-tied w/ battery backup system <br>for a customer. Array will be ~15kW; pole or stand alone structure <br>mounted; 250' from home/batteries. My question is: does it make any <br>sense to invert the power at the array and use this ac to make the <br>long run to the batteries THEN connect to a typical battery charger <br>rather than a dc charge controller? Im mostly concerned with huge dc <br>conductors making this run across the property. Havent delved into <br>the specific design enough to size said conductors yet, or specify <br>any equipment, but wanted to know if im barking up the wrong tree ir <br>not.<br>Thanks for the insight.<br><br>Eric Thomas<br>Founder<br>Solar Epiphany LLC<br>NABCEP Certified PV Installer<br>WA Electrical Contractor # SOLAREL911NR<br><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br></div></blockquote><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br></div></div></span>
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