[RE-wrenches] Invert first?

[PRP]

 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
> > 
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