(close this window to return to the Performance page)

This is a summary of the energy produced during the second calendar year of operation. It is a photo of the LCD readout of my inverter.

• The tick marks along the left side of the readout indicate kWh in increments of 5 kWh. There are 13 pixels between each tick, so each row represents about 385 Wh.
• The tick marks along the bottom side of the readout indicate months of 2008. The are 9 or 10 pixels between each tick, so each column represents about 3.2 days. The first tick (near the left edge) is February 1, 2009, and the final tick (near the right edge) is January 1, 2010.

For example, you can see that the average production during that first 3-day period of February 2009 was about 16.9 kWh.

Notice that the average production was in the 15-20 kWh range from late January 2009 through February. Then it rose to the 20-25 kWh range in March, April, and May. It stayed around 20 kWh in June, July, and August. Then, it slowly dropped to the 10-15 kWh range by the end of November. December was very spotty (lots of snow cover for several days at a time), with several 3-day periods that were below 5 kWh. Then it started to return to the 10-15 kWh range in January 2010.

Overall, the system produced a total of 4040 kWh over 365 days, for a daily average of 11.1 kWh.