How big is the fuel cell capacity of the Mirai?
The Mirai’s fuel-cell stack is designed to deliver peak power in the low hundreds of kilowatts, typically around 110–130 kW, which corresponds to roughly 150–175 horsepower. Exact figures vary by generation and market, but modern models generally sit in that range for peak output.
Numbers by generation
The following summarizes commonly cited peak power ratings for the Mirai across its generations. Note that Toyota’s official materials emphasize range, efficiency, and driving performance, while the stack’s electrical output is the underpinning measure most often cited by reviewers and spec sheets.
- First-generation Mirai (2015–2016): about 114 kW (roughly 153 hp) from the fuel-cell stack.
- Second-generation Mirai (2017–2020, including the facelift): about 128 kW (roughly 172 hp) from the stack, with improvements in efficiency and packaging.
- Current generation (2021–present): around 128 kW (roughly 172 hp) with ongoing refinements; actual peak power can vary with drive mode, temperature, and other conditions.
Concluding: Across generations, the Mirai’s fuel-cell stack has evolved from about 114 kW to approximately 128 kW, with newer models emphasizing efficiency alongside peak output.
What “fuel-cell capacity” means in practice
The term refers to the maximum electrical power the fuel-cell stack can produce, not the amount of hydrogen stored or the size of the battery. In a hydrogen fuel-cell vehicle like the Mirai, the stack generates electricity on demand to feed the electric motor and powertrain systems. Hydrogen tanks determine range, while the stack’s rating influences how much power is available for acceleration and sustained driving. Real-world performance also depends on temperature, driving conditions, and the vehicle’s energy-management strategy.
Why the number matters for drivers
A higher peak fuel-cell output generally enables stronger acceleration and better sustained power at higher speeds, especially when climbing hills or merging onto highways. However, efficiency improvements and battery buffering can also improve perceived performance and range, so the rating is one piece of a broader, integrated powertrain story.
Summary: The Mirai’s fuel-cell capacity sits in the low-to-mid 100 kilowatts range, with newer models typically around 128 kW (about 172 hp). Exact figures vary by model year and market, but the trend has been toward maintaining strong peak output while improving efficiency and range.
How big is the hydrogen fuel cell car tank?
A typical fuel cell electric vehicle or hydrogen car tank capacity is around 4-6 kg of hydrogen and the weight of the hydrogen tank is around 100 kg. For example, the Toyota Mirai hydrogen tank has a capacity of 5.6kg hydrogen, the Hyundai Nexo has 6.33 kg and Mercedes Benz GLC F-Cell has 4.4 kg hydrogen tank capacity.
What is the lawsuit against Toyota Mirai?
Toyota faces legal action over lack of hydrogen fuel infrastructure. California Mirai owners filed a class-action lawsuit against Toyota seeking $5.7 billion in damages. Plaintiffs allege Toyota concealed reliability issues and misrepresented hydrogen infrastructure.
How big are the fuel cells in the Toyota Mirai?
Each stack comprises 370 (single-line stacking) cells, with a cell thickness of 1.34mm (0.05 in) and weight of 102 grams (3.6 oz). The compact Mirai FC stack generates about 160 times more power than the residential fuel cells on sale in Japan.
How much hydrogen fuel does a Toyota Mirai hold?
The Toyota Mirai has a total internal volume of about 122.4122.4122.4 liters, which holds approximately 5.65.65.6 kg of hydrogen, according to Toyota Global Newsroom and Toyota UK Magazine. The hydrogen is stored in two carbon-fiber-reinforced tanks with a combined volume of 122.4122.4122.4 liters, composed of a front tank (606060 liters) and a rear tank (62.462.462.4 liters).
- Total internal volume: 122.4122.4122.4 liters
- Hydrogen storage capacity: Approximately 5.65.65.6 kg (for the newer models), which is a bit more than the 5.05.05.0 kg in the earlier models
- Tank material: Carbon-fiber-reinforced plastic
- Storage pressure: 707070 MPa (about 10,00010 comma 00010,000 psi)
