[RE-wrenches] Sunny Island vs. XW system - advice requested

[jay peltz]

Hi Allan,

I'd guess you'd have to define "better".

But I'm pretty sure the efficiency of the the sunny boy is much higher than the XW CC.

I don't like the fact that the XW CC you have to mount your own disco/fuses.  

Did you know that Midnite is coming out with an Epanel for the SI?

The best option would be the SI/SB version to me.

Cheers,

Jay

Peltz power




On Aug 23, 2012, at 7:39 AM, Allan Sindelar wrote:

> Wrenches,
> We have worked with Outback Radian and Schneider XW once or twice each for grid-tie with backup, and with Sunny Boy/Sunny Island numerous times. The SMA is certainly the most sophisticated equipment, but also the most expensive. 
> 
> For a particular job coming up, the loads are not excessive, and the array will be 8kW. The main hitch is that the array will be located on a barn roof that is about 500' from the BOS and home.
> 
> I suspect that running high-voltage DC from the array to a Sunny Boy, and then feeding a pair of Sunny Islands makes the most sense. My question is this: does it make any sense to consider running two high-voltage subarrays 500' to two Schneider XW-MPPT-80 600V charge controllers, feeding two XW inverters (in order to handle the full 8kW) in a DC-coupled approach? 
> 
> Is there ever a situation in which this would be a better solution than SMA?
> 
> Thank you, as always,
> Allan
> -- 
> Allan Sindelar
> Allan at positiveenergysolar.com
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder and Chief Technology Officer
> Positive Energy, Inc.
> 3209 Richards Lane (note new address)
> Santa Fe, New Mexico 87507
> 505 424-1112
> www.positiveenergysolar.com
> 
> 
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