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David A's Solar Power

Since electic rates continue to rise and recent years have seen brownouts, many Californians have installed some solar panels to reduce our costs and to aid everyone by providing extra power when it's most needed: during hot sunny days.

See also water use

Over 230,000 homes in California have solar panels generating electricity.

According to a February 2015 Washington Post, investment by individuals and companies in US Solar/Wind energy production was 389 billion dollars over the years 2007-2014.

SunRun installed our solar plant. Sunrun seemed a little...disorganized during 2015. We don't expect to need any service for 10-13 years, so lets hope they fix their internal issues.

We have twenty eight panels installed. Eighteen facing slightly south of directly west, Ten facing slightly east of directly south.

We watch our power use and generation using The Energy Detective TED 5000 inductive couplers and the associated wall-wart computer which provides a web server on our home network with all the power data. It can produce nice reports with just your browser on your home network, but I added my own software to make my own reports and to ensure the data is all captured on my systems (not relying on the wall-wart from TED to keep the historic data safe).

From examination of SunRun's historical data we were generating a maximum of about 20KwH per day in the summer of 2014 with the 18 panels installed then.

On a sunny day we generally generate 37 KwH. Here are some of the 5 highest recorded Kwh generation days so far. Five pine trees died in 2016 and one eucalyptus was dangerously large. Getting rid of those trees has lead to the first instance of generating over 40KwH in one day and by July 20, 2016...more!

2016-07-16 41.847
2016-06-14 40.641
2016-05-09 40.275
2015-05-12 39.993
2015-05-03 39.856

Here are some low recorded Kwh generation days.

2014-12-11 0.588
2014-12-02 1.361
2014-10-13 2.091
2015-12-21 3.034
2015-12-15 3.085

269 Kwh: Lowest monthly generation. December 2014.

1076 Kwh: Highest monthly generation. August 2015.

Most of the 2014-2015 winter was just above 500Kwh per month.

Solar Electricity Generation. As recorded by TED5000

Electricity use. As recorded by TED5000
Daily generation:
   date       kwh
2017-03-24   11.110
2017-03-23   35.097
2017-03-22   32.850
2017-03-21   29.606
2017-03-20    7.308
2017-03-19   18.862
2017-03-18   21.524
2017-03-17   35.771
2017-03-16   30.537
2017-03-15   27.612
2017-03-14   35.819
2017-03-13   36.440
2017-03-12   36.840
2017-03-11   32.982
2017-03-10   24.726
2017-03-09   32.491
2017-03-08   36.035
2017-03-07   28.171
2017-03-06   23.974
2017-03-05   22.783
2017-03-04   21.860
2017-03-03   31.053
2017-03-02   36.051
2017-03-01   36.271
2017-02-28   36.078
2017-02-27   35.147
2017-02-26   28.232
2017-02-25   28.889
2017-02-24   35.719
2017-02-23   35.514
2017-02-22   30.155
2017-02-21   23.467