Winter Solstice 2007

As a new solar PV owner, the winter solstice now has a new meaning. Each day will be longer and have more production potential. However, even on this the shorted day of the year, we produced more power than I expected; we made 2.8 kilowatt hours of power.

You can click on the above image to check out our solstice power production page. Our inverter is wired to the Internet and collecting and reporting data every 15 minutes when the Sun is out.

I have redesigned the Performance Details page. It now has reports from every 15 minutes to years.

Since we started monitoring on 28 Nov'07, our best day generated 5.4 kWh on 8 Dec'07. A record I hope we break soon. Looking at the charts you can see the weather impact is significant. I need to learn XML and add that days weather icon (sunny, partly cloudy...) for my zip code from weather.com to the power production charts. Adding a solar irradiance line would be nice too. If you know a good reference for collecting data (XML and other) from various websites and coalescing them, please let me know.

Power Generated to date: 88 kWh and growing.

Enjoy,
cs