We installed solar batteries on the roof of our house.

Solar wind affects the Earth's magnetic field.

He was reading a book about the ancient Egyptian sun god.

The ocean currents can change due to the effect of the solar tide.

The sunlight is illuminating the room brightly.

The service life of this machine is 10 years.

We calculate time using the solar calendar.

When will you go to Japan?

When are you going to Japan?

He will help at any time.