[Greenbuilding] PV Tracking

[RT]

I ran into my neighbour in town this afternoon as he was coming out of a  
grocery store, delighted that they had given him two cartsful of fresh  
corn for his llamas, free, because the cobs were too small to sell to  
shoppers.

I told him that I had been telling people (this List) that his single-axis  
tracking array had produced 40 and sometimes 44% more than the Enphase  
fixed array and that you (the Listmembers) were telling me that I was full  
of $#!+.

We both just shrugged our shoulders (as if to say "Nyeh! What can you do  
about  unbelieving heathens ?") and I proceeded to speculate on the effect  
that the fresh corn would have on his llamas' bowel movements, noting how  
corn tends to loosen-up humans and recalling that he had told me that  
llamas have a habit of crapping all over places that they like (after a  
suggestion from me that maybe he should think about digging a swimming  
pool for them down in his creek...bad idea).

In any case, I found the following from him in this evening's mail:
------- Forwarded message -------
From: [The Llama /Morgans Rancher-neighbour]
Date: Tue, 02 Aug 2011 20:57:41 -0400

Rob, today we did 76.33 kwh. We should have done more as we definitely  
have shading from our nearby trees. However this is still 38% better than  
nearby Enphase with a fixed system, which did 55.3 kwh. Other single axis  
systems without our shading do a fair bit better than us. 38% is not that  
unusual for our system and we will do 40 or more percent more on days when  
the sun is more constant.

I am told that Greenwork's dual axis system does substantially better than  
us and with the wide arc of the sun that is quite possible this time of  
year. They were giving me figures of 130 plus on sunny days!

[All of the above figures are for nominal 10 kW capacity arrays -- RT]
  ------- end of forwarded material -----------

-- 
=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c at Y a h o o dot C A >
(manually winnow the chaff from my edress if you hit REPLY)
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