All of the house's electricity is produced by 'solar panels' on the roof.
He punched him in 'the solar plexus'.
a 'solar' eclipse/phenomenon
(..) an entire race of machines. We don't know who struck first, us or them. But we know that it was us that scorched the sky. They were dependent on solar power ... ... and it was believed that they would be unable to survive ... ... without an energy source as abundant as the sun. (..)1999 The Matrix