Van Buer/Chang Solar Energy Daily History as of Wed Sep 25, 2025
Quarterly Production History
You can see the jumps from daylight savings time and in the winter some
mid-afternoon shading from a palm tree and the occasional cloudy and rainy days
that substantially reduce production.
The graphs and status page are generated by a program written by
Darrel J. Van Buer, running on a Linux system.
Power production data is read over a serial port connection to a
Xantrex GT series inverter.
The results are put on the web page and also stored in a mysql database.
If you are interested in a copy of the program, contact the author at
darrel@vanbuer.net
