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 <[EMAIL PROTECTED]>
To: RE-wrenches <[email protected]>
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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