Reason 26: Solar roofs on campus provide energy when it is most needed (summer air conditioning peak).

The table shows mean daily global solar radiation (important for solar electricity output) for Tokyo averaged of 30 years (1951-1990). The first graph shows average weekly temperatures in Tokyo.

We observe the natural agreement of high solar radiation and high temperatures from May to September. Therefore, high temperatures in Tokyo occur at times of high solar power output of solar panels.

Stat. Descr.	Unit	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

Mean Daily Value

MJ/m2

8.5

9.9

11.7

14.3

16.0

13.6

13.9

14.6

10.4

9.4

7.6

7.4

Source: UNData of Global Solar Radiation for Tokyo, avg. 1961-1990

Source: here.

As an example the graph to the left shows the 24h temperature curve of 11th August 2020. The peak temperatures occur between approx. 9am and 6pm. 

Comparison with the average 24 hour solar irradiance per hour (generates solar electricity) during a day in August shows, that it is maximal between 9am and 5pm.

This shows that even on the scale of hours, high temperatures and high solar irradiance (-> high solar electricity output) agree.

Solar rooftop electricity therefore does not need to be stored expensively, it can be immediately used for air conditioning when it is most needed.

O Lord, how manifold are Your works!
In wisdom You have made them all.

Psalm 104:24, NKJV

Average annual solar irradiance during every hour of each 24-h day during August (black solid line, overall maximum; black dashed line, overall average; the other lines, daily values) Source: here.