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Solar PV Generation and Usage Numbers
| Date |
Solar kWh Production |
# of Days |
Avg Produced kWh per day |
Actual kWh Usage |
Avg Usage kWh per day |
Avg Usage Less Production in kWh |
% of Electricity Generated vs Usage |
Actual Output vs Predicted Output |
| February 2009 |
18.59 |
3 |
6.2 |
46.71 |
15.57 |
9.37 |
39.8% |
-42.4% |
| March 2009 |
386.66 |
31 |
12.47 |
464.47 |
14.98 |
2.51 |
83.2% |
-11.9% |
| April 2009 |
462.47 |
30 |
15.42 |
392.87 |
13.1 |
-2.32 |
117.7% |
5.6% |
| May 2009 |
441.03 |
31 |
14.23 |
383.98 |
12.39 |
-1.84 |
114.9% |
-5.6% |
| June 2009 |
475.69 |
30 |
15.86 |
493.62 |
16.45 |
0.59 |
96.4% |
3.6% |
| July 2009 |
559.29 |
31 |
18.04 |
753.71 |
24.31 |
6.27 |
74.2% |
25.4% |
| August 2009 |
523 |
31 |
16.87 |
793.16 |
25.59 |
8.71 |
65.9% |
25.7% |
| September 2009 |
436.02 |
30 |
14.53 |
467.88 |
15.6 |
1.06 |
93.2% |
10.1% |
| October 2009 |
367.03 |
31 |
11.84 |
315.12 |
10.17 |
-1.67 |
116.5% |
-2.1% |
| November 2009 |
302.75 |
30 |
10.09 |
336.16 |
11.21 |
1.11 |
90.1% |
10.5% |
| December 2009 |
246.25 |
31 |
7.94 |
399.56 |
12.89 |
4.95 |
61.6% |
1.8% |
| January 2010 |
318.19 |
31 |
10.26 |
447.1 |
14.42 |
4.16 |
71.2% |
14.9% |
| February 2010 |
276.95 |
28 |
9.89 |
401.7 |
14.13 |
4.24 |
70.0% |
-8.0% |
| March 2010 |
442.47 |
31 |
14.27 |
398.19 |
12.84 |
-1.43 |
111.2% |
0.8% |
| April 2010 |
562.3 |
30 |
18.74 |
359 |
11.97 |
-6.78 |
156.6% |
28.4% |
| May 2010 |
506.39 |
31 |
16.34 |
458.36 |
14.79 |
-1.55 |
110.4% |
8.4% |
| June 2010 |
527.35 |
30 |
17.58 |
716.6 |
23.89 |
6.31 |
73.6% |
14.9% |
| July 2010 |
568.03 |
31 |
18.32 |
960.52 |
30.98 |
12.66 |
59.1% |
27.4% |
| August 2010 |
496.8 |
31 |
16.03 |
868 |
29.08 |
13.05 |
55.1% |
19.4% |
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| One Year Summary from Sept 1, 2009 thru August 31, 2010 |
5,051 |
365 |
13.84 |
6,128 |
16.79 |
2.95 |
82.4% |
11.5% |
| Summary From Feb 26, 2009 to August 31, 2010 |
7,917 |
552 |
14.34 |
9,457 |
17.13 |
2.79 |
83.7% |
9.5% |
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| - In addition, by rolling over monthly kWh - I was able to generate enough electricity that for April 2009, May 2009, June 2009, October 2009, November 2009, March 2010, April 2010, May 2010 and June 2010 my BGE Electricity Bills were Zero. |
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| - Actual output is running about 9.5% better than predicted output based upon the calculations from PVWatts.org |
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That is "Going Green and Saving Green". |
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