[RE-wrenches] crystalline VS uni-solar

[Joel Davidson]

Hello Jay,
 
Sounds like something is wrong other than Unisolar vs. crystalline. All things being equal, the Unisolar should produce more kWh per kW than crystalline. Questions:
1. What modules and how many of each?
2. What inverter or inverters?
3. Geographic location?
4. Array azimuth and tilt?
 
Best regards,
Joel Davidson



----- Original Message ----
From: jay peltz <jay at asis.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Friday, October 31, 2008 8:27:19 AM
Subject: Re: [RE-wrenches] crystalline VS uni-solar

Hi Geoff, 

In regards to the performance between Unisolar and crystalline, there is a side by side ( same watts, batteryless intertie with metering) installation up here on the North coast of California, and the the Unisolar is the constant under-performer.  This includes cloudy, sunny, warm, cold weather.

I have seen nothing in the field to support the Unisolar claims about better performance in low light etc.  That said, they do work better in very hot conditions, if thats what you have.

jay

peltz power



On Oct 31, 2008, at 8:08 AM, Geoff Greenfield wrote:

As a follow up to my uni-solar post (and thanks to all who provided feedback),  I have a second request:
 
Any references to recent side-by side "shoot-outs" between Unisolar and conventional crystaline PV?  Scientific studies?  Your own wrench thoughts?
 
I am more and more often encountering confused customers that are considering unisolar systems at zero-tilt (we are at 40 degrees N), with plenty of partial shading, after getting a pitch about all sorts of advantages of Uni-Solar.  I think that this product has it's role and I occasionally sell it... But I am frustrated when I truly believe I can deliver a better net energy production with a tilted crystalline solution (avoiding the shaded areas).  

For a brighter energy future,

Geoff Greenfield
Founder and CEO
Third Sun Solar & Wind Power Ltd.
340 West State Street, Unit 25
Athens, OH 45701

740.597.3111     Fax 740.597.1548
www.Third-Sun.com

Clean Energy - Expertly Installed


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