How long does it take to refill a Mirai?
Typically 3 to 5 minutes at a hydrogen fueling station, assuming a full fill of about 5 kg to 700 bar.
Refilling a Toyota Mirai involves delivering compressed hydrogen to its high‑pressure tanks. The exact time depends on the station’s capability, ambient temperature, and how much hydrogen remains in the tanks. The Mirai’s three high‑pressure tanks collectively hold roughly 5 kilograms of hydrogen and are filled to about 70 MPa (700 bar) to complete a full refill. In practice, the process is designed to be as quick as a comparable gasoline refuel, though infrastructure and conditions can vary by location.
What factors affect refueling time
Several variables influence how quickly you can complete a Mirai fill. The following factors are the most influential.
- Hydrogen station pressure and fill protocol: stations capable of 700 bar fast‑fill can deliver a full fill more quickly than lower‑pressure or slower fill setups.
- Current tank state and capacity: starting with an empty or low‑fill tank will take longer than topping up a near‑full tank, though many drivers begin from around a quarter to half full.
- Ambient temperature and station performance: hydrogen temperature, ambient heat, and cooling/heating cycles can affect fill rate and final pressure.
- Station throughput and queue: if the station is busy, you may experience delays before the fill starts or ends as the nozzle transitions to a full‑fill cycle.
- Vehicle safety and fill algorithm: the Mirai’s onboard system controls the fill to ensure safe, stable pressure rise, which can influence the exact duration at the end of the fill.
In practical terms, most drivers report a 3–5 minute window from initiating the fill to completion, assuming a ready station and standard conditions.
Regional context and what to expect
Hydrogen fueling networks are expanding, with strong deployment in California, Japan, and parts of Europe. In many public stations across these regions, 70 MPa fast‑fill is standard, helping to keep refueling times comparable to gasoline under optimal conditions. However, availability, station technology, and queue times vary by location, so actual times may differ.
Why times vary by location
Some stations still operate at different pressures or with slower fill protocols, and external factors like weather or maintenance can affect performance. Always check the specific station’s capabilities and current conditions for the most accurate estimate.
Summary
Refilling a Mirai generally takes about 3 to 5 minutes at a properly equipped 70 MPa (700 bar) hydrogen station, with real‑world times influenced by station capability, how full the tanks are, ambient conditions, and station traffic. As hydrogen infrastructure grows and standardizes toward fast‑fill systems, Mirai owners can expect fueling times that are broadly in line with conventional refueling, though regional differences may apply.
