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2008 Solar Data Home Page
When you click on any of the buttons to the left you will see a day by day spreadsheet of each month's solar power generation. With each sheet you will be able to see the data in a graph format.
Note that the bar graphs illustrate the total power used by the house. The yellow part of the bar indicates the amount of power generated by the solar array.
Furthermore, if the bar descends below the bottom of the graph then for that day more power was produced than was used. The reading on our house meter will be less than the day before. This will occur in the summer time when we are not using air conditioning.
Below see the year to date at a glance. Gen means power generated by solar. Grid means power used from the grid. And % Gen is the electricity generated each month as a percent of the total monthly electrical power usage.
We have also added other yearly charts and graphs for the analysis of monthly peak power and array efficiency.
Some Statistics from the 2008 Data Base
total solar generation per kW of collector 1086.7 kWh/kW average solar power generation per day 4.5 kWh total power generation 1630.0 kWh total grid power used 3461.5 kWh percentage of total power generated 32.0% house total electrical power consumption 5091.5 kWh total gas used 2591 cubic meters yearly average gas usage / day 7.10 cubic meters average gas usage / day for heating 7.92 cubic meters total yearly power consumption from all sources 31.90 mWh house efficiency - cm used per HDD 0.54 cubic meters
Generation breakout
Average 4.5 kWh Median 4.6 kWh Maximum 9.5 kWh Minimum 0.0 kWh Stdev 2.7 kWh
Generation Efficiency Breakout Average 3.9 Wh/min/kW Median 4.0 Wh/min/kW Maximum 8.4 Wh/min/kW Minimum 0.0 Wh/min/kW Stdev 2.2 Wh/min/kW Year 2008 Monthly kWh Analysis
| Month | Gen | Grid | % Gen | ||
| January | 66.4 | 462.1 | 12.6% | ||
| February | 91.7 | 476.1 | 16.2% | ||
| March | 154.8 | 338.7 | 31.4% | ||
| April | 196.4 | 97.7 | 66.8% | ||
| May | 187.0 | 109.4 | 63.1% | ||
| June | 173.3 | 195.8 | 47.0% | ||
| July | 197.9 | 205.4 | 49.1% | ||
| August | 170.5 | 129.3 | 56.9% | ||
| September | 134.6 | 195.2 | 40.8% | ||
| October | 124.9 | 263.8 | 32.1% | ||
| November | 75.0 | 420.2 | 15.1% | ||
| December | 57.5 | 567.8 | 9.2% | ||
| Total: | 1630.0 | 3461.5 | 32.0% |
Year 2008 Monthly Peak Watt Analysis
| Minimum | Maximum | Average | Median | Std Deviation | ||
| Jan-08 | 49.0 | 1351.0 | 740.2 | 612.0 | 501.7 | |
| Feb-08 | 88.0 | 1567.0 | 1031.8 | 1327.0 | 543.0 | |
| Mar-08 | 160.0 | 1677.0 | 1149.1 | 1286.0 | 427.6 | |
| Apr-08 | 188.0 | 1617.0 | 1165.3 | 1227.5 | 323.3 | |
| May-08 | 443.0 | 1727.0 | 1069.4 | 1175.0 | 299.2 | |
| Jun-08 | 675.0 | 1622.0 | 1173.7 | 1298.0 | 232.2 | |
| Jul-08 | 372.0 | 1444.0 | 1157.5 | 1193.0 | 199.3 | |
| Aug-08 | 1004.0 | 1457.0 | 1179.6 | 1132.0 | 116.4 | |
| Sep-08 | 237.0 | 1615.0 | 1099.2 | 1117.0 | 320.5 | |
| Oct-08 | 508.0 | 1562.0 | 1203.7 | 1223.0 | 273.6 | |
| Nov-08 | 121.0 | 1531.0 | 1011.9 | 1122.0 | 408.1 | |
| Dec-08 | 44.0 | 1424.0 | 747.3 | 907.0 | 542.0 |
Monthly 2008 Efficiency Analysis
| Minimum | Maximum | Average | Median | Std Deviation | ||
| Jan-08 | 0.1 | 7.1 | 2.5 | 1.2 | 2.4 | |
| Feb-08 | 0.2 | 8.4 | 3.3 | 3.0 | 2.5 | |
| Mar-08 | 0.5 | 7.9 | 4.6 | 4.4 | 2.7 | |
| Apr-08 | 0.5 | 7.9 | 5.4 | 6.5 | 2.3 | |
| May-08 | 0.9 | 7.3 | 4.5 | 4.5 | 1.9 | |
| Jun-08 | 1.5 | 6.4 | 4.2 | 4.2 | 1.4 | |
| Jul-08 | 1.5 | 6.5 | 4.7 | 4.6 | 1.4 | |
| Aug-08 | 1.7 | 7.1 | 4.4 | 4.5 | 1.4 | |
| Sep-08 | 0.4 | 6.4 | 4.0 | 4.5 | 2.0 | |
| Oct-08 | 0.8 | 6.8 | 4.0 | 4.1 | 2.1 | |
| Nov-08 | 0.1 | 7.3 | 2.8 | 2.8 | 2.0 | |
| Dec-08 | 0.0 | 6.7 | 2.3 | 1.4 | 2.4 |
