May 2012 South Wall Radiation
Day Daily Mean Daily Sum Maximum
w/m2 kwh w/m2
1 113.87 2.7 768
2 198.61 4.8 937
3 145.90 3.5 641.7
4 197.49 4.7 965
5 188.15 4.5 862
6 164.85 4.0 732
7 155.17 3.7 973
8 174.74 4.2 856
9 260.67 6.3 899
10 173.47 4.2 920
11 215.02 5.2 956
12 174.88 4.2 823
13 221.55 5.3 954
14 209.70 5.0 949
15 156.90 3.8 862
16 266.73 6.4 874
17 264.05 6.3 843
18 259.39 6.2 897
19 259.65 6.2 875
20 232.61 5.6 854
21 228.04 5.5 950
22 142.03 3.4 771
23 132.76 3.2 805
24 168.99 4.1 906
25 32.81 0.8 134.7
26 170.62 4.1 754
27 103.38 2.5 522.9
28 230.61 5.5 1008
29 183.33 4.4 852
30 259.98 6.2 844
31 178.35 4.3 811
Mean daily values for a south wall. While seeing only half of the sky, this is a frequently used for a fixed photovoltaic array, as no snow accumulates on it.
Max: 1008 w/m2
Min: 0 w/m2
Monthly Mean: 189.17 w/m2