What Is Electric Vehicle Supply Equipment (EVSE)?
EVSE is equipment that supplies electrical power to an electric vehicle and manages the connection between the vehicle and the building’s electrical system. An EVSE assembly typically includes a charging cable, connector, control circuitry, and protective functions. The term covers the charging equipment, not the vehicle’s onboard battery charger.
Quick Facts About EVSE
Category
Electric vehicle charging equipment
Used for
Managing power delivery to electric vehicles
Common confusion
EVSE is not the vehicle’s onboard charger
Also called
Electric Vehicle Supply Equipment, EV charging equipment
Often discussed with
Emergency EV charger repair
Key Takeaways About EVSE
- EVSE controls the connection between a vehicle and its power source.
- A charging station may include EVSE plus supporting electrical equipment.
- EVSE is not the same as the vehicle’s onboard battery charger.
How EVSE Works
EVSE controls the electrical connection between a power source and an electric vehicle. The equipment communicates with the vehicle before power flows, then helps manage that flow during charging. Its control functions can pause charging when the connection is interrupted or when the vehicle signals that charging should stop.
Related glossary terms: Load Management, Circuit Breaker, Overcurrent Protection.
A charging installation may include an EVSE unit, a dedicated circuit, overcurrent protection, wiring, and a disconnecting method. The charging connector links the EVSE to the vehicle, while the vehicle’s onboard charger converts incoming power for the battery. For that reason, an EVSE problem can involve the equipment, its circuit, the connector, or the vehicle connection.
From the GMB Electric team
When we inspect EVSE, we check the charging equipment, its connection points, and the electrical circuit serving it. Our team also looks for damaged conductors, loose terminations, abnormal readings, and signs that the equipment is not communicating correctly with the vehicle.
EVSE in Practice: A Real-World Example
An Indianapolis homeowner reports that an EVSE unit stops charging after connection. We inspect the connector, wiring, circuit protection, and equipment controls to separate an EVSE fault from a vehicle-side charging issue.
Related Services
Related Terms
Load Management
Load Management is the planned control of electrical demand across connected equipment. The system monitors available…
Circuit Breaker
A Circuit Breaker is a resettable electrical switching device that opens a circuit when current exceeds…
Overcurrent Protection
Overcurrent Protection is a system that limits electrical current when a circuit carries more power than…
Voltage Drop
Voltage Drop is the reduction in electrical voltage that occurs as current travels through a conductor…
GMB Electric
Have Questions About EVSE?
Contact GMB Electric for practical guidance on EVSE and related 24 hour electrician work in Indianapolis.