[RE-wrenches] crystalline VS uni-solar

[jay peltz]

Hi Joel,

1.   unisolar 64's and sharp single cystal

2. SMA inverters

3. Arcata California

4. exact, I mean side by side with no shading, same azimuth ( south)  
same tilt ( can't remember)

5.  As to the unisolar producing more, I must stress that I have never  
seen the Unisolar produce more than SC, never.

jay

peltz power
On Oct 31, 2008, at 1:01 PM, Joel Davidson wrote:

> 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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