Question

solar energy has many uses. it can be used to heat homes, to power light bulbs, and to run cars. people can also store solar energy in batteries.
solar energy can pack a lot of power. heres an example. workers built a solar roof over a soccer field in switzerland. cells on the roof supply enough power for 200 homes each year!
identify main idea and supporting details
solar energy can supply a lot of power. highlight the sentence that supports this idea by giving an example of the power supplied by a solar roof in switzerland.

Explanation:

The main idea is that solar energy can supply a lot of power. The sentence that supports this by giving an example of the power from the Swiss solar roof is the one stating the specific power output.

Answer:

Cells on the roof supply enough power for 200 homes each year!