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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 |
18.6 |
3 |
6.2 |
46.7 |
15.57 |
9.37 |
39.8% |
-42.4% |
| March 2009 |
386.7 |
31 |
12.47 |
464.5 |
14.98 |
2.51 |
83.2% |
-11.9% |
| April 2009 |
462.5 |
30 |
15.42 |
392.9 |
13.1 |
-2.32 |
117.7% |
5.6% |
| May 2009 |
441.0 |
31 |
14.23 |
384.0 |
12.39 |
-1.84 |
114.9% |
-5.6% |
| June 2009 |
475.7 |
30 |
15.86 |
493.6 |
16.45 |
0.59 |
96.4% |
3.6% |
| July 2009 |
559.3 |
31 |
18.04 |
753.7 |
24.31 |
6.27 |
74.2% |
25.4% |
| August 2009 |
523.0 |
31 |
16.87 |
793.2 |
25.59 |
8.71 |
65.9% |
25.7% |
| September 2009 |
436.0 |
30 |
14.53 |
467.9 |
15.6 |
1.06 |
93.2% |
10.1% |
| October 2009 |
367.0 |
31 |
11.84 |
315.1 |
10.17 |
-1.67 |
116.5% |
-2.1% |
| November 2009 |
302.8 |
30 |
10.09 |
336.2 |
11.21 |
1.11 |
90.1% |
10.5% |
| December 2009 |
246.3 |
31 |
7.94 |
399.6 |
12.89 |
4.95 |
61.6% |
1.8% |
| January 2010 |
318.2 |
31 |
10.26 |
447.1 |
14.42 |
4.16 |
71.2% |
14.9% |
| February 2010 |
277.0 |
28 |
9.89 |
401.7 |
14.13 |
4.24 |
70.0% |
-8.0% |
| March 2010 |
442.5 |
31 |
14.27 |
398.2 |
12.84 |
-1.43 |
111.2% |
0.8% |
| April 2010 |
562.3 |
30 |
18.74 |
359.0 |
11.97 |
-6.78 |
156.6% |
28.4% |
| May 2010 |
506.4 |
31 |
16.34 |
458.4 |
14.79 |
-1.55 |
110.4% |
8.4% |
| June 2010 |
527.4 |
30 |
17.58 |
716.6 |
23.89 |
6.31 |
73.6% |
14.9% |
| July 2010 |
568.0 |
31 |
18.32 |
960.5 |
30.98 |
12.66 |
59.1% |
27.4% |
| August 2010 |
496.8 |
31 |
16.03 |
901.4 |
29.08 |
13.05 |
55.1% |
19.4% |
| September 2010 |
492.4 |
30 |
16.41 |
479.4 |
15.98 |
-0.43 |
102.7% |
24.3% |
| October 2010 |
440.4 |
31 |
14.21 |
266.4 |
8.59 |
-5.61 |
165.3% |
17.4% |
| November 2010 |
396.0 |
30 |
13.20 |
310.3 |
10.34 |
-2.86 |
127.6% |
44.5% |
| December 2010 |
283.2 |
31 |
9.13 |
519.2 |
16.75 |
7.61 |
54.5% |
17.0% |
| January 2011 |
250.3 |
31 |
8.07 |
440.3 |
14.20 |
6.13 |
56.8% |
-9.6% |
| February 2011 |
352.6 |
28 |
12.59 |
347.6 |
12.41 |
-0.18 |
101.4% |
17.1% |
| March 2011 |
464.5 |
31 |
14.98 |
459.5 |
14.82 |
-0.16 |
101.1% |
5.8% |
| April 2011 |
405.1 |
30 |
13.50 |
361.1 |
12.04 |
-1.47 |
112.2% |
-7.5% |
| May 2011 |
495.5 |
31 |
15.98 |
528.7 |
17.06 |
1.07 |
93.7% |
6.1% |
| June 2011 |
521.8 |
30 |
17.39 |
743.8 |
24.79 |
7.40 |
70.2% |
13.7% |
| July 2011 |
588.3 |
31 |
18.98 |
1128.3 |
36.40 |
17.42 |
52.1% |
31.9% |
| August 2011 |
505.9 |
31 |
16.32 |
772.9 |
24.93 |
8.61 |
65.5% |
21.6% |
| September 2011 |
306.8 |
30 |
10.23 |
440.8 |
16.05 |
5.83 |
63.7% |
-22.5% |
| October 2011 |
373.1 |
31 |
12.04 |
285.1 |
9.20 |
-2.84 |
130.9% |
-0.5% |
| November 2011 |
341.3 |
30 |
11.38 |
355.3 |
11.84 |
0.47 |
96.1% |
24.6% |
| December 2011 |
308.8 |
31 |
9.96 |
374.8 |
12.09 |
2.13 |
82.4% |
27.6% |
| January 2012 |
347.9 |
31 |
11.22 |
454.9 |
14.67 |
3.45 |
76.5% |
25.6% |
| February 2012 |
398.5 |
29 |
13.74 |
394.5 |
13.60 |
-0.14 |
101.0% |
27.7% |
| March 2012 |
476.5 |
31 |
15.37 |
345.5 |
11.15 |
-4.23 |
137.9% |
8.5% |
| April 2012 |
542.7 |
30 |
18.09 |
337.7 |
11.26 |
-6.83 |
160.7% |
23.9% |
| May 2012 Est |
273.2 |
18 |
15.18 |
183.2 |
10.18 |
-5.00 |
149.1% |
0.8% |
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| One Year Summary from May 1, 2011 to April 30, 2012 |
5,207 |
366 |
14.23 |
6,162 |
16.84 |
2.61 |
84.5% |
14.7% |
| Summary From Feb 26, 2009 to April 30, 2012 |
16,482 |
1178 |
13.99 |
19,019 |
16.15 |
2.15 |
86.7% |
11.5% |
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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, June 2010, September 2010, October 2010, November 2010, December 2010, March 2011, May 2011, October 2011, November 2011, December 2011, March 2012, April 2012 and May 2012 my BGE Electricity Bills were Zero. |
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| - Actual output is running 10% 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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