Skip to Content

2021 Official Regulations

2021 Official Regulations

The aim of the Bridgestone World Solar Challenge is to stimulate research into, and development of, sustainable road transport. The Bridgestone World Solar Challenge is primarily a design competition. The regulatory philosophy is to provide the parameters on which to base the design, rather than specify exactly how to build a solar car. Science and technology evolve and to encourage the most innovative ideas, event requirements also evolve.

Participation in the 2021 Bridgestone World Solar Challenge calls for the design and construction of a solar car within given design parameters and driving the solar car across the continent of Australia in accordance with these regulations. 

Each Bridgestone World Solar Challenge is different. Revisions for the 16th edition retain the clear distinction between Challenger and Cruiser Classes: Challenger Class cars will be efficient, and Cruiser Class cars will be efficient and practical. 

DOWNLOAD THE 2021 REGULATIONS - Bridgestone World Solar Challenge 2021 Regulations Release Version 1.0


Major changes for 2021 include:

  • Challenger Class solar cars must have three or more wheels
  • new ground clearance requirements based on automotive standards
  • new turning circle requirements
  • rear-wheel steering is not permitted
  • solar collectors must have low environmental toxicity (GaAs, CdTe and CuInSe2 will not be permitted)
  • a standard manikin, "PVC Pat", must fit into each seat
  • teams must have the dynamic stability of their solar car certified
  • the emergency safe state may not have any voltage or current present outside of energy storage packs or the solar collector
  • solar cars must have daytime running lamps
  • the licence plate must be mounted at the rear of the solar car
  • teams must have their solar cars re-certified after making significant repairs.

The full 2021 Bridgestone World Solar Challenge Regulations will be available for download from 19 June 2020.