module testing [RE-wrenches]

[Bill Brooks]

Carl,

The tests we will run will be similar to the European "Yield" tests where we
are measuring the number of kWh/kW of modules. Amp/Hour tests are typically
done on stand-alone systems. Over 75% of the grid-connected systems
installed in California have battery backup, so our tests will obviously
need to address these systems. This puts us in a less-defined arena
somewhere between the kWh/kW test and the Amp/hour test. As I think about
it, this would actually be a simplified Amp/hour test since we are going to
operate the battery at float (27 Volts or 54 Volts, temperature compensated)
and simply measure current from each string of modules. If we are successful
in our proposal, I would be happy to share our test procedure with anyone
who cares to get into the details.

I have just completed the first draft of a PV System Installation Guide for
the California Energy Commission. If anyone is interested in reviewing it
and providing some comments, please email me directly <billb at endecon.com>
and I will be happy to email you a PDF version of the guide (it is about 1MB
in size). I would greatly appreciate thoughtful criticism.

Bill.



> -----Original Message-----
> From: Carl Emerson [mailto:freepower at freepower.co.nz]
> Sent: Tuesday, April 03, 2001 4:40 PM
> To: RE-wrenches at topica.com
> Subject: Re: module testing [RE-wrenches]
>
>
> Hullo again...
>
> Can we please keep this issue alive.
>
> Let's know Amp/Hours produced in real conditions across the brands.
>
> Cross brand module testing keeps the industry honest.
>
> I would be prepared to support such an initiative and I'm sure
> other Wrenches
> feel the same.
>
> Cheers,
>
> Carl Emerson
> Free Power
> New Zealand.
>
> Kent Sheldon wrote:
>
> > Good luck Bill. We are in the process of pulling our hardware from the
> > PV-USA site. I think they are getting ready to sell the rest of
> it off. I'm
> > meeting with someone from CEC there on Friday, and will let you
> know what
> > comes of it.
> >
> > Kent Sheldon
> >
> >
> >
> > Jerry,
> >
> > We are going to try to use PVUSA as a site, but that may or may not be
> > possible. Regardless, we will be pursuing state funding to do "consumer
> > report" testing that presents the results and lets the chips
> fall where they
> > may. Much of the testing that occurs at NREL and Sandia is to
> specifically
> > support feedback to the manufacturers so it intentionally kept
> silent so the
> > manufacturer can fix their problems.
> >
> > We are suggesting a process that is independent and provides a
> real source
> > of information for the California Buydown program. Many other
> organizations
> > will be able to use the information, but the Buydown program is
> the purpose.
> >
> > Bill.
>
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