01 — How FCEVs Work
Pollution-Free Power
FCEVs use stacks of fuel cells that combine hydrogen with oxygen from the air to produce electricity, which then powers the vehicle's electric motors. The only byproduct is water — zero tailpipe emissions.
TRANSIT FCEV SERVICE—WITH HYDROGEN SAFETY BUILT AROUND THE WORK
Bus & Fleet
Hydrogen Service Bays
Patent PendingMarathon Bus & Fleet Hydrogen Service Bays create a focused service environment for transit and fleet hydrogen-powered vehicles. The bay coordinates hydrogen detection, upward airflow, containment, exhaust, alarms, interlocks and controls around the vehicle and the approved maintenance workflow. Engineered for roof-mounted storage geometry and high throughput.
Gallery
Our Bus & Fleet Hydrogen Service Bays
Single bays, dual-bus configurations, and full custom builds — engineered around the largest FCEV transit and motor coach platforms.
Bus & Fleet Hydrogen Service Bay
Our largest standard model.
Built best for large-volume, large-vehicle FCEV service facilities. Of course, we can build any custom size you need. This model carries the same safety systems and features as our other models.
If your shop is strictly standard automotive, see our Automotive FCEV Hydrogen Service Bays. If you service trucks and heavy equipment, check out our Truck & Equipment FCEV Hydrogen Service Bays.
Get a Quote Now
HSB — Bus & Fleet Drawing
STANDARD SPECIFICATIONS
TYPICAL STANDARD CONFIGURATION
14 ft W × 16.5 ft H × 47.5 ft L
Custom dimensions are available to fit the vehicle envelope, service process and facility.
Features & Components: steel capture hood with bolted construction; fire-retardant perimeter curtain or fully enclosed walls; RKI Instruments hydrogen detection; spark-resistant exhaust fans with automatic purge; visual and audible alarms; hazardous location rated lighting. Final components are configured to your application and local requirements.
SCOPE OF SUPPLY
One Coordinated Project, Clearly Defined
Marathon engineers and manufactures the Hydrogen Service Bay system, coordinates the controls and ventilation package, and supports installation and commissioning according to the approved project scope. Facility work, utilities, permitting, fire protection, roof work and trade responsibilities are identified in the proposal so every party knows what is included before the project begins.
Need engineering? Marathon works with licensed engineering partners who can provide site surveys, mechanical, electrical and fire protection design, professionally stamped drawings, and third-party commissioning. Permitting remains the responsibility of the owner or their contractor.
COMMISSIONING & OPERATIONAL HANDOFF
Verify the Coordinated Safety Response
Commissioning verifies the installed system functions included in Marathon’s approved scope, including applicable detection, alarm, ventilation, interlock and control responses. Designated facility personnel receive an operational handoff covering the bay controls and normal system indications. Vehicle service procedures, emergency-response planning and technician qualification remain governed by the vehicle manufacturer, facility safety program and applicable authorities.
Code Compliance
Engineered for Applicable Codes and Local Review
Each Hydrogen Service Bay is engineered for the codes adopted for the project location and coordinated with the local Authority Having Jurisdiction (AHJ). Depending on the project scope, applicable requirements may include NFPA 2, NFPA 70, the International Fire Code, International Building Code, International Mechanical Code, and OSHA requirements. Final requirements are project- and jurisdiction-specific.
Understanding the Technology
Hydrogen Fuel Cell Repair for Bus & Fleet
FCEVs offer terrific benefits for transit operators and unique opportunities for service providers — when handled with the right infrastructure.
02 — The Service Process
Vehicle-Specific Workflows
Before service begins, technicians must follow the vehicle manufacturer’s procedures and the facility’s approved plan for shutdown, defueling or isolation, purging when required, and verification of a safe state. Marathon designs the service environment to support the approved workflow; the exact procedure remains vehicle- and project-specific.
03 — Why It's Different
Lighter-Than-Air Fuel
Unlike petroleum, hydrogen is lighter than air — if released, it rises and pools at the ceiling. The capture hood and enclosure direct released hydrogen to the exhaust, away from building lights and wiring.
The requirements for servicing hydrogen-powered FCEVs are highly specific. A dedicated H₂ service bay coordinates detection, airflow, alarms and interlocks as one engineered response to manage hydrogen risk during standard maintenance — preparing your transit yard or motor coach facility for the growth of fuel cell vehicles.
Introducing Marathon's Smart Control Panel
Every aspect monitored.
Every component controlled.
Our exclusive SMART control panel monitors and controls every aspect of the internal environment, as well as every component. Your safety is assured, and productivity is maintained at its highest level.
Normal Operations
Constant Monitoring, Instant Response
- Integrated safety systems constantly monitor gas levels.
- Alerts users to unsafe gas levels.
- Takes corrective action automatically.
Our Design Process
Engineered to Exacting Standards
From first conversation to commissioned system — a transparent, four-step engagement.
01
Step 1
Design Consultation & Facility Evaluation
We start by understanding your facility, your workflow, and your service goals.
02
Step 2
3D Modeling & Engineering
Detailed models and engineered drawings tailored to your space and codes.
03
Step 3
Manufacturing & Crate for Shipping
Built in our Temecula, California facility and prepared for safe transit.
04
Step 4
Deliver, Install & Commission System
On-site installation and commissioning by the Marathon installation team.
Download the Hydrogen Service Bay Brochure
Specifications, dimensions, and configuration options for the Bus & Fleet Hydrogen Service Bay product line.
Not Sure? Ask Us About It.
We're happy to help find the right solution for you. Find out today how quickly we can get you up and running.
Call Us at 310 791-5601Application Planning
Design for the fleet you operate.
Transit projects need a coordinated view of vehicle access, roof-mounted systems, service schedules, and the existing maintenance building. Bring operations and facilities teams into planning together.
Read the buyer’s guide01
Fleet & roof access
Confirm bus models, dimensions, hydrogen storage locations, and required rooftop work. Include service platforms, fall-protection interfaces, open panels, and component handling in the review.
02
Building & bay arrangement
Document overhead obstructions, structural conditions, nearby occupied areas, vehicle doors, and possible exhaust routes. Discuss individual or multiple bay arrangements around the available footprint.
03
Phasing & operational continuity
Review the installation window, construction access, utility interruptions, and commissioning availability. Agree on handover, personnel training, and maintenance responsibility before the bay enters service.
A Clear Project Scope
Know what happens around the bay.
A complete project connects the manufactured system to the building and the people using it. Confirm these responsibilities in your proposal and project documents.
Define the scope
Confirm the bay configuration, supplied components, engineering deliverables, and work assigned to each project partner.
Planning details →Prepare the site
Coordinate building work, utilities, structural review, permits, access, unloading, and any local contractor work before delivery.
Planning details →Verify the installation
Agree on the commissioning plan, documented safety responses, training, and records that will be provided at handover.
Planning details →Plan ongoing care
Identify the responsible team, approved maintenance instructions, service records, and a process for reviewing future modifications.
Planning details →Let’s plan your bay
Ready to discuss your hydrogen facility?
Speak with a specialist about your specific service bay requirements.