Event Rules

2026 Rules Microsoft Word Format (.pdf) Adobe PDF Format (.pdf) Adobe PDF Format, with Tracked Changes from 2025 (.pdf) For questions, please send an email to marks@solarcarchallenge.org, and the Event Director will reply as soon as possible. Questions applicable to the general audience may be submitted in the Rules Updates/Clarification list below, listed anonymously.

Rules Updates

Rules Updates and Clarifications Updates to Rules will continue to be made here or through the Event Update page. Teams are responsible for periodically checking the Event Update page: http://www.solarcarchallenge.org/challenge/updates.shtml The following list is provided as a courtesy. Teams are responsible to review the full set of Event Updates. 9/1/25: Rule 33.3 was corrected to a battery capacity of 10.5 kWh. The Cruiser Division capacity was designed to be twice the Classic Division capacity.

Rules Clarification: Additional Roll Bar Per Rule 5.2.2 Question: For solar cars where the driver's head rises above the top of the solar car body, does the additional roll bar require the same minimum dimensions as the primary roll bar? Answer: The additional roll bar is designed to defect the array should it be pushed in the direction of the driver. It certainly can have a smaller diameter and thickness so long as it would withstand the pressure of a collision.

Copyright (c) 1995-2025 Lehman Marks. All Rights Reserved. Solar Car Challenge, 3505 Cassidy Drive, Plano, TX 75023 Questions about the challenge? Contact Dr. Lehman Marks, Event Director