Understanding fuel cell electric vehicles and hydrogen is an important step on the road to commercialization. CaFCP will facilitate education for first responders and authorities having jurisdiction (see the training link below).


The response guides below are provided by the individual companies for your reference. We recommend attending one of the workshops to better understand the properties of hydrogen and fuel cell electric vehicles.

Mercedes-Benz B-Class F-CELL ERG

Mercedez-Benz B-Class

Chevy Fuel Cell EV Emergency Response Guide

Chevy Fuel Cell EV ERG



FCEVs are electric vehicles that make electricity from compressed, gaseous hydrogen stored onboard the vehicles and oxygen from the air. Vehicle safety is of utmost importance; safety systems for high-voltage, and high-pressure are designed according to SAE International standards and around hydrogen’s unique properties.

Fuel Cell Electric Vehicle Safety Systems


High-Voltage Systems


High-voltage Systems

  • Same technology as other gasoline/electric hybrids and battery electric vehicles
  • Orange high-voltage wiring per SAE International
  • Isolated positive and negative sides (not grounded to the chassis)
  • Automatic high-voltage system disconnect
    • Inertia switch
    • Ground fault monitoring

Compressed Hydrogen Storage Systems


Compressed Hydrogen Storage Systems


  • Carbon-fiber wrapped high pressure vessels with polymer or metal liners
  • Equipped with temperature activated pressure relief devices (TPRD)
  • Undergo testing according to national and international standards, including bonfire and projectile tests
  • Can be single or multiple tank systems


Properties of Hydrogen


Properties of Hydrogen

  • Colorless, odorless, non-toxic
  • A gas at ambient conditions
  • A cryogen: liquid at -423° F (or colder)
  • 14 times lighter than air
  • LFL 4% (gas detection designed to shut systems down at around 2%)
  • Most easily ignited mixture: 29% in air


CaFCP and its members have worked closely over the years with local fire departments, the Office of the California State Fire Marshal, national fire and life safety training experts, and the expertise of our members to develop and provide materials for awareness and operations-level education about FCEVs and hydrogen stations. CaFCP remains integrally involved in the evolution of these resources, and as a subject matter expert. The link below is an excellent resource for training, safety, codes & standards, and more!


December 10th, 2015 webinarThe webinar introduced the Hydrogen Equipment Certification Guide, a document intended to aid in equipment approval until listed equipment are available for the entirety of equipment and components. Additionally, the webinar also started a public comment phase of the document for soliciting stakeholder feedback in preparation for a September 2016 release. http://energy.gov/eere/fuelcells/downloads/hydrogen-equipment-certification-guide-webinar