RULES Regulations

Rules to further enhance the development of technology
Following technology advancements, changing environmental needs, and most importantly to encourage teams to continue to push their boundaries for innovation, BWSC’s own technical faculty study and revise regulations for each edition of the event. Below is a brief introduction of regulations to enjoy the race!


Speed Challenge :

A Race to Determine the World's Fastest Solar Car!
While the allowable solar panel size has decreased 2017 (to half the size of the first event in 1987), there is more flexibility in vehicle size. Participating teams are likely to come up with innovative designs that have never been seen before. With the possibility for replacements in dominants of the podium, which solar car will end up being the first to cross the finish line!?

(Allowable size) differ depending on the material used
Vehicle Design - 4 wheels
- Maximum 5m in length, 2.2m in width, and 1.6min height
- Approximately the size of a large passenger vehicle –
Seating Capacity 1(Teams are required to have at least 2 drivers to take turns operating the vehicle)
If the driver weighs less than 80kg, weights are added.
Power Source Only solar energy!


Practicality Challenge :

Create Vehicles for the Future!
Teams need to arrive between 11:00 and 14:00 on Day 6, as the order in which teams finish does not affect evaluation. So how will each team transport their passengers with efficiency? Look out for a battle of technology and wisdom!

(Allowable size differ depending on the material used)
Vehicle Design - 4 wheels
- Maximum 5m in length, 2.2m in width, and 1.6min height
Seating Capacity Maximum 4 (Including the driver)
Power Source Solar energy + external recharge

Evaluation Standards Scored by both energy efficiency and practicality

Score: Energy efficiency × Practicality × Penalty points

  • ・ Design innovation
  • ・ Ease of operation (driving and charging)
  • ・ Environmental
  • ・ Versatility
  • ・ Ease of access and egress
  • ・ Style and desirability
  • ・ Occupant space and comfort
  • ・ Suitability for the declared purpose


Non-competitive: Participate for Inspiration and Adventure

The Adventure Class is designed to allow participants to take part and enjoy the adventure. Expect a variety of unique vehicles in this class!

COMMON RULES Other Common Rules


Teams can only operate their vehicles between 8:00 (8:30 on Day 1) and 17:00,
for a total of nine hours per day.
Demerit points may be imposed if teams operate their vehicles outside of the allotted time.


To participate in the race, vehicles must pass scrutineering (both dynamic and static) that takes place before the official start.

Vehicle Inspection

Throughout the race, vehicles must stop for 30 minutes at designated control stops (a total of 7 stops were set up in the previous event) for Vehicle Inspection.
At any given time, if it is determined that a vehicle is incapable of operating at over 60 km/h, has issues that may prevent it from operating safely, or will not be able to finish the course within the allotted time, the vehicle will be towed to an appropriate location. The team can rejoin the race after it has been towed, but twill not be evaluated.

Other Rules

Many other regulations are in place to ensure team safety;

Requirement of escort vehicles in front of and behind the solar car
Speed limits
Ensuring front and side vision
Equipment of lights and signals
Maintenance of proper driving posture
Mandatory seat-belt and helmet use
Secure of potable water to prevent heatstroke