Month

Solar radiation on horizontal surface (Kwh/m² day)

Solar radiation on fixed 20.83˚ tilt surface (Kwh/m² day)

Efficiency (%)

Jan

4.149

4.831

16.430

Feb

4.942

5.520

11.690

Mar

5.502

5.865

6.590

Apr

6.020

6.055

0.581

May

6.002

5.857

−2.415

Jun

5.213

5.053

−3.069

Jul

4.990

4.860

−2.605

Aug

5.003

4.949

−1.079

Sep

4.521

4.598

1.703

Oct

4.576

4.960

8.391

Nov

4.422

5.132

16.056

Dec

4.082

4.876

19.451

Average

4.952

5.213

5.977