An introduction to Electric Vehicle Charger testing

26 April 2024


The adoption of electric vehicles (EVs) is rapidly accelerating worldwide. Major vehicle manufacturers are committed to transitioning to electric products, and governments are setting aggressive EV adoption targets. Consumer demand is also rising, driven by environmental awareness, lower operating costs, and improving vehicle ranges. 

With more and more EVs taking to the roads, there is a corresponding growth in demand for EV charging infrastructure, from home charging facilities to high-powered fast chargers in public locations. However, installing and maintaining these charge points, which are more accurately described as EV Supply Equipment (EVSE) systems, introduces new challenges and safety considerations. Faulty charger installations can present serious electrical hazards, including risks of fire and electrocution. They can also lead to poor reliability, which is a major inconvenience for EV users, and can hide future operating costs.

For these reasons, testing of EVSEs when newly installed and then routinely throughout their lives is essential. Providing these testing services is an excellent and continuing business opportunity for electrical contractors who have the equipment and know-how necessary to carry out the work. 

To meet the need for equipment, Megger has developed solutions that allow EVSEs to be tested safely, conveniently and cost-effectively. To help meet the need for know-how, Megger has produced this guide as an introduction to EVSE technology and testing. Also available is a step-by-step guide to EVSE testing and detailed instructions in the user manuals for the Megger products used to carry out these tests. 

A wide range of facilities for charging EVs are currently in use. These are most often referred to as ‘EV chargers’ or ‘EV charge points’, but these names are a little misleading as, in the majority of cases, the actual charger is in the vehicle. In these cases, the ‘charge point’ is effectively just a source of power, typically combined with protection, and possibly metering, appropriate to use for EV charging. For these reasons, a more accurate description is Electric Vehicle Supply Equipment or EVSE, which covers not only the charge point itself but also the charging cables and connectors. 

Establishing safe, reliable, and efficient charging infrastructure for electric vehicles is essential. It is important to ensure that EVSEs are properly installed and maintained to avoid safety hazards and maintain public confidence and adoption.

Robust and future-proof charging networks require comprehensive electrical safety and performance testing. Qualified electrical contractors equipped with purpose-built test equipment can ensure infrastructure keeps pace as EVs become more mainstream.

This blog series provides an overview of various charging methods, components, safety considerations, and testing approaches. It is recommended to refer to the latest editions of the relevant standards alongside information provided by EVSE manufacturers. 

If you require additional technical materials, product guidance, or support for testing EVSEs, please contact Megger.