Charting our Power
Power over the year
Problem: We use most of our power when the sun position
is not at its best. We generate more power in the summer,
and use the power in the winter. Similarly, we use more electricity at night.
Solution: When we generate excess power, we supply other houses in the neighborhood while
our electricity meter spins backward.
The chart below shows the power differences on a monthly basis.

Obviously, power flows better when the sun is high and hot. The
amount of power generated per hour each day follows a haystack curve. The winter
months show a smaller haystack since the day is shorter and the sun is lower in the sky.

These numbers are estimates, gleaned from the California Energy
Commission's Clean Power Estimator.
We were able to specify where our house is located, along with the
brand and size of the solar cell array. Try it yourself.