SWR2500U Some derating likely [RE-wrenches]

[jberdner at sma-america.com]

Joel:

Amen to that!
We have been asking the CEC for a performance test protocols for almost
two years !
I have made several proposals at various conferences and meeting with
ZERO response to any of the suggestions we offered. 
I hear there is a draft of some protocol that is almost ready to release
but given the past performance I would not hold my breath. 
If it is "almost ready to release as a draft" it is probably years away
from implementation.
 
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: Thursday, November 21, 2002 6:21 PM
To: RE-wrenches at topica.com
Subject: Re: SWR2500U Some derating likely [RE-wrenches]

Bill,

The CEC asked for written comments for the recent renewable energy
program staff
workshops. Here's a recommendation I submitted: Require inverter
manufacturers
to provide inverter output performance curves certified by an
independent
testing laboratory. This is first step is necessary before
performance-based
ratings and rebates can be implemented.

In the early 1990s, Omnion, Trace and Kenetech provided performance data
so
designers could optimize inverters and PV modules (and meet SMUD bid
requirements). John Berdner remembers those good old days when our
design team
bought inverters and his combiner boxes by the truckload :-)

Its time to crank it up a notch and buy inverters by the truckload
again. I'm
sure John can whip up some data for the Sunny Boy. Chris remembers the
old
SW5548 non-battery data. The newcomers at Xantrex can dig up the old
SW5548
non-battery data and produce numbers and curves for the XR.

"Some derating likely" is ok for general web info, but system designers
need the
data.

Best regards,
Joel Davidson

Bill Brooks wrote:

> Joel,
>
> The only way to know the answer to that question is to have a detailed
> computer model of the inverter and run a simulation.

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