[RE-wrenches] Sanyo Bi-facial

Bill Brooks billbrooks7 at yahoo.com
Tue Apr 14 14:34:39 PDT 2009


August,

 

A very annoying aspect of this manufacturer's brochure is that the cute bar
graph has a fairly large error. What the heck does "Daily Average Power
Generation" mean. I think they mean energy. Just a nit-picky pet peeve of
mine that we see too often in the energy world.

 

The data on this chart is based on 3, hand-picked days from May 22 to June
21, 2007. What's up with that? So, the basic story being told by this very
misleading bar graph is that if you have the same (obviously ideal) days
that they picked (it took them a dang month to get 3 good days-ok so Japan's
solar resource sucks), then you might get better performance.

 

Bottom line, use them because their pretty and Sanyo is a good company, not
because you believe their misleading advertising.

 

BTW Holt, you need to mount your modules 10 feet off your white roof to get
the 10% chance on improvement during 10% of the year. 

 

Is there any wonder why our industry has problems with misleading
advertising and overselling the benefits of a technology that is already one
of the most amazing inventions in the history of the world.

 

Bill. 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of August Goers
Sent: Tuesday, April 14, 2009 1:21 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Sanyo Bi-facial

 

Holt -

 

I don't have data (yet) on systems we've installed but the Sanyo brochure
has a rough chart on the second page which might be worth looking at if you
haven't already:

 

http://us.sanyo.com/dynamic/product/Downloads/HITDoublebrochure2008-30935473
.pdf

 

Good luck! -August

 

August Goers

 

Luminalt Energy Corporation

O:  415.564.7652

M:  415.559.1525

F:   650.244.9167

www.luminalt.com <http://www.luminalt.com/> 

august at luminalt.com

 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of
holtek at sbcglobal.net
Sent: Tuesday, April 14, 2009 6:31 AM
To: RE-Wrenches
Subject: [RE-wrenches] Sanyo Bi-facial

 

Are there any real world numbers on percentages of wattage increase due to
reflectance on the backside of Sanyo Bi-facial modules? Specifically - a
6/12 white metal roof @185dg. - horizon to horizon window. Have potential
application for 200kw+ array. Would like to have more than a "we think"
number in the proposal.

 

Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com

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