Month

Insulation

Direct Normal Radiation

[hours]

[kWh/m²]

Jan

10

3.21

Feb

11

4.18

Mar

12

5.39

Apr

13

6.48

May

14

7.06

Jun

15

7.65

Jul

15

7.79

Aug

14

7.20

Sep

12

6.06

Oct

11

4.82

Nov

10

3.57

Dec

10

2.94