[RE-wrenches] RE; ARCO Solar and Carrizo Plain

2011-11-01 Thread North Texas Renewable Energy Inc
ARCO built the place in the early 80s because of the late 70s energy crisis... *** The response to the '70s energy crisis, though it was about oil, included the formation of PURPA: The Public Utility Regulatory Policies Act (PURPA) is a law, passed in 1978 by the United States Congress as

[RE-wrenches] treasury grant expiration and safe harbor rule

2011-11-01 Thread Kirk Herander
Hi, Could someone please point me to info on the details of how these rules work? Does construction start of the system(or 5% of system costs paid) have to be documented with the feds before the end of the year for safe harbor? Thanks. Kirk Herander VT Solar, LLC dba Vermont Solar Enginee

Re: [RE-wrenches] RE; ARCO Solar and Carrizo Plain

2011-11-01 Thread Michael Welch
Hi gang. If you have any questions about this, please contact me OFF list. While this thread is interesting, and certainly a failed utility-scale PV facility's modules being dumped on the market could affect your business, this is off-topic for this list because it's really about politics of ene

[RE-wrenches] Bifacial modules

2011-11-01 Thread Keith Cronin
Hi Was wondering if any of you have installed bifacial modules and know what the % of light that comes through to a surface below the modules? Looking for a canopy type of installation/ application and wondered if you have any #'s? Thank you~   Aloha, Keith___

Re: [RE-wrenches] Bifacial modules

2011-11-01 Thread Hans Frederickson
For the Sanyo and Silicon Energy modules I've worked with, it is a very small amount of light that actually passes through in the gaps between the cells. You could do a simple ratio calculation by measuring the area of the gaps and the area of the cells. Just guessing, I would say about 3-4%, if th

Re: [RE-wrenches] Bifacial modules

2011-11-01 Thread Bill Brooks
Keith, This is easy to test. Simple take an irradiance sensor, turn it upside-down and test the irradiance on the bottom surface of any PV array. It will vary greatly based on exposure to reflected light and so on, but it will rarely be above 100 W/m^2. 10% improvement is an absolute maximum fo

Re: [RE-wrenches] Bifacial modules

2011-11-01 Thread Jesse Dahl
Remember that Silicon Energies modules are not bifacial. Jesse Sent from my iPhone On Nov 1, 2011, at 4:13 PM, "Hans Frederickson" wrote: > For the Sanyo and Silicon Energy modules I’ve worked with, it is a very small > amount of light that actually passes through in the gaps between the cel