Chou Supercar Gattiger
Genres: Action, Sci-Fi
Type: TV, Episodes: 25
Aired: Oct 4, 1977 to Mar 28, 1978
Source: Unknown
Rating: G - All Ages
Synopsis:
A scientist invents 5 special solar powered cars that can be joined into one supercar. The cars are given to the scientists son and his friends to compete in the racing circuit, but they are pursued by an evil organization that wants the secret of solar power. 

(Source: AniDB)