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