On grid w/battery [RE-wrenches]

[Bill Brooks]

Eric,

Great to finally meet you in New Orleans. Energy delivered to the grid
appears to be in line with expected for that unit (below normal). Watch the
input voltage between 9:30 and 1:30 on a perfectly sunny day and you will
see the dc voltage routinely stay several volts about max power. An a-Si
array will behave better, but it will still have tracking difficulties.

Bill.


-----Original Message-----
From: Eric Smiley [mailto:Eric_Smiley at bcit.ca]
Sent: Tuesday, May 28, 2002 2:37 PM
To: RE-wrenches at topica.com
Subject: Re: On grid w/battery [RE-wrenches]



We have an UT SW4048 PV inverter operating here in Vancouver, BC since
May 2000.

The array is 1944 Watts STC facing east on a 30 degree tilted roof. Roof
integrated BIPV skylight.
The Mean Daily Global Solar Radiation in the Plane of the Array is 3
peak sun hours (Environment Canada tables).
Average power to the grid is 3.5 kWh/day.

A data aquisition system (pyranometer, temperature, voltage, current
etc.) is being added this year and we'll be publishing the results in
the future.

Eric Smiley - Project Leader
Photovoltaic Energy Applied Research
BCIT Technology Centre

phone: 604.432.8657    fax: 604.436.0286
esmiley at bcit.ca             www.tc.bcit.ca

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