A fairly strong December allowed us to exceed the magic 4,200 kWhr mark for 2011.

In the 12th month of the year, we generated 256 kWhrs of electricity. That was enough to bring our annual total to 4,237 kWhrs - 4,200 kWhrs being an average year.

The two inverters continue to hum quietly and generate very little heat.

Our solar thermal panels generated December heat at a fine pace - the heated water is stored in two, 500-gallons tanks in the basement and is then circulated in our radiant floors. The hot water tanks have average 130 degrees during sunny days.

Now in our 18th year, our home is a living testimony to the value of solar investment over the long term.

UPDATE: On January 1, 2012, we had a sunny day with temperatures in the mid-40s. When the solar thermal pumps began circulating the water on the roof in the morning, the tank temperature was 95 degrees. It ended up at 130 by mid afternoon. If my calculations are correct, the sun gave us 291,900 BTU of heat for overnight use in our radiant floors. Thanks be to God's creation!