Complex sentence: Stearns, ever innovative, moved to automobile production in built his first car in 1899, an electric which sold so few models through 1900 that the company changed to steam power in 1901.
Split into simpler sentences: Stearns, ever innovative, moved to automobile production and built his first automobile in 1899, an electric. The company sold so few models through 1900 that they reverted to steam power in 1901.