Month | Optimal tilt angle (degree) | Solar radiation on optimal tilt surface (Kwh/m2 day) | Solar radiation on horizontal surface (Kwh/m2 day) | Difference (Kwh/m2 day) | Efficiency (%) |
Jan | 40 | 5.058 | 4.149 | 0.909 | 22 |
Feb | 35 | 5.612 | 4.942 | 0.67 | 14 |
Mar | 25 | 5.864 | 5.502 | 0.362 | 6.58 |
Apr | 10 | 6.095 | 6.02 | 0.075 | 1.246 |
May | 5 | 6.007 | 6.002 | 0.005 | 0.08 |
Jun | 0 | 5.213 | 5.213 | 0 | 0 |
Jul | 0 | 4.99 | 4.99 | 0 | 0 |
Aug | 5 | 5.019 | 5.003 | 0.016 | 0.31 |
Sep | 15 | 4.602 | 4.521 | 0.081 | 1.8 |
Oct | 30 | 4.984 | 4.576 | 0.408 | 8.92 |
Nov | 40 | 5.394 | 4.422 | 0.972 | 22 |
Dec | 45 | 5.208 | 4.082 | 1.126 | 27.58 |
Average | 20.833 | 5.337 | 4.952 | 0.385 | 8.710 |