SWR2500U Some derating likely [RE-wrenches]

[Graham Owen]

Bill,

I hope Shell read your posting.  The new earthsafe systems spec 22 
SP140’s.  I would probably continue panelizing groups of 4 in shop if 
they specified 20 modules (sometimes groups of 5 depending on the roof 
dimensions).

I flew up to Sacramento recently and spent a long weekend with Matt 
Lafferty looking at many different installations and performance data.  
SMUD uses 20 KC120’s to avoid derating the SB inverter.  They also 
panelize in shop in groups of four with Tray cable.

Graham



Bill Brooks wrote:
> John and Joel,
> 
> Don't forget that the SP140 is the same module as the SP150 last month. 
> They
> just rerated their modules. I think 22 SP140s is pushing your luck on 
> the
> derating issue. I would feel better about 20 SP140s.
> 
> Bill.
> 
> 
> -----Original Message-----
> From: jberdner at sma-america.com [mailto:jberdner at sma-america.com]
> Sent: Wednesday, November 20, 2002 3:36 PM
> To: RE-wrenches at topica.com
> Subject: RE: SWR2500U Some derating likely [RE-wrenches]
> 
> 
> Joel:
> 
> I would expect very little to no actual power loss given this scenario.
> 
> If you have any questions, or if I can be of any further assistance,
> please do not hesitate to contact me.
> 
> Best Regards,
> 
> John Berdner
> 
> SMA America, Inc.
> 12438 Loma Rica Drive, Unit C
> Grass Valley, CA  95945
> 530.273.4595 (voice)
> 530.274.7271 (fax)
> 
> 
> -----Original Message-----
> From: Joel Davidson [mailto:joeldavidson at earthlink.net]
> Sent: Wednesday, November 20, 2002 3:34 PM
> To: RE-wrenches at topica.com
> Subject: SWR2500U Some derating likely [RE-wrenches]
> 
> How much derating is likely with an SWR2500U inverter mounted on an
> outside north wall in the shade with good ventilation with either 24
> each KC120-1 solar modules or with 22 each SP140 solar modules and a
> temperature range of 5  to 122 degrees F.?
> Joel Davidson
> (Michael, Thank you very much for moderating this list which is like
> herding cats).
> 
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