Short answer: The percentage of time a charger is actively delivering energy to a vehicle, a key business metric for charging network operators.
Explanation
Charger utilization measures how much of the time a charger is actually being used for charging sessions. A utilization rate of 15% means the charger is delivering energy about 3.6 hours per day and sitting idle the remaining 20.4 hours. Most public chargers today have utilization rates between 5% and 25%.
Utilization matters for the business side of EV charging. Low utilization means the expensive hardware and grid connection are not generating enough revenue. High utilization means the charger is busy, which is good for revenue but can mean queues for drivers.
As EV adoption grows, utilization rates are climbing. Networks in high-traffic locations (motorway stops, urban centers) already see 20-30% utilization, which is roughly the level needed for profitability. For drivers, higher utilization at a location means a higher chance of needing to wait, so checking real-time availability before driving to a busy station is wise.
Where you'll see this
- In charging network apps
Common confusion
Utilization and uptime are different metrics. Uptime measures whether the charger is working (operational vs broken). Utilization measures whether a working charger is actively being used by a car.
Example
A busy urban fast charger might have 95% uptime (working almost all the time) but only 20% utilization (actually charging cars 20% of the time). Both numbers are normal.
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