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2008 January
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Solar Data Home

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