The software that controls the inverters and produces the dynamic content has kept a log since September 6, 2001, of the following inverter parameters. They are sampled approximately every minute. At the end of each six minute period, the averages of each of the samples occurring during that period are output. From this data, the various graphs and calculations that appear on this web page are produced. Graphs based on the cost of electricity use the correct historical rate and assume a Tier 5 E-EPS surcharge, which we would be paying were it not for our photovoltaic system.

Date and Time

Power produced by each inverter pair

Power drawn from or delivered to the power grid

Power delivered to loads in the house

Grid and Inverter AC voltages

State of sun (up or down)

DC bus voltages for each of the inverter pairs

Upon request, we would consider making this raw data available for other types of analysis.

Some interesting days to look at:

Date		Comments
9/20/2001		Under a 10kW sell limit, a perfect day
10/25/2001		Under a 20kW sell limit, a perfect day
10/29/2001		A rainy overcast day
11/12/2001		A very overcast day, grid power failure 10am to noon
7/9/2002		No sell limit, a perfect day