What is the power output of a HyMax fuel cell system?
HyMax fuel cell systems are designed to deliver continuous power output ranging from 1 kW to more than 50 kW, depending on configuration. This output is sufficient to power Intelligent Transportation Systems (ITS), traffic signals, communications equipment, and other mission-critical infrastructure during grid outages.
High efficiency (typically 45–60%) ensures optimal hydrogen utilization. This level of precision makes them an excellent alternative to diesel generators for extended runtime without power fluctuations.
How long can a HyMax fuel cell run on a full hydrogen supply?
As part of its commitment to improving emergency response and transportation system resilience, in 2025 Caltrans conducted a formal lab evaluation of the system at its Translab facility in Sacramento. The test was led by the Electrical Quality Assurance and Source Inspection (EQASI) branch, which confirmed uninterrupted operation for 5 days and 18 hours under a consistent electrical load, a major increase from the 4-hour average provided by traditional battery backup systems.
How quickly do HyMax fuel cell systems start during a power outage?
HyMax fuel cells feature automatic startup with response times measured in seconds. When grid power is lost, the system detects the outage and begins delivering power almost instantly, avoiding the long crank-and-warm-up times typical of diesel generators.
This near-instant response ensures that safety-critical systems, including traffic signals and emergency communications, stay operational without disruption, preventing hazardous dark intersections.
Can HyMax fuel cell systems be scaled to produce more power or achieve longer runtimes?
Yes. HyMax systems are modular, allowing operators to add additional fuel cell stacks or hydrogen storage as demand grows. This scalability supports future expansion without requiring a complete system replacement.
Scalable architecture is key for municipalities planning phased infrastructure upgrades. It ensures cost efficiency while meeting resiliency requirements and climate mandates.
What environmental conditions can HyMax fuel cell systems operate in?
HyMax fuel cell systems are engineered for harsh environments, with operating ranges from -30°C to +50°C (-22°F to 122°F). Units are weather-sealed, vibration-resistant, and capable of withstanding coastal humidity, desert heat, and mountain snow.
Why are HyMax systems trusted for critical infrastructure?
HyMax has demonstrated reliable performance across a wide range of climates. Features like automatic switchover manifolds, remote monitoring, and scalable refueling systems provide continuous backup power even during severe weather events and grid failures.
These capabilities give DOTs, municipalities, and public works agencies confidence that critical ITS infrastructure will remain powered during grid outages, ensuring public safety and compliance with federal resiliency standards.
Visit the HyMax fuel cell product page or connect with our engineering experts for technical data, configuration recommendations, and integration assistance. Secure a backup power system that is engineered for reliability, scalability, and future-readiness.
