Choose the Right Industrial Power Supplies for EV Chargers

EV charging is one of the fastest-growing business verticals in the world. This article aims to provide EV charger manufacturers with a power supply selection guide, allowing them to focus on developing the core competencies of their end systems.

Delta is a leading provider of power supplies for electronic vehicle (EV) chargers that addresses the expanding infrastructure of the EV industry. Our power supply solutions are engineered to meet the diverse requirements of EV charger manufacturers and charging stations. Whether enhancing connectivity, ensuring user interface efficiency, or providing essential power to safety devices, we offer the latest power supply technology.

Inside EV chargers

There are several sub-systems inside typical DC EV chargers requiring reliable industrial switching power supplies.

• MCU The main control unit or controller of the EV charger requires power to manage charging sessions, communicate with the vehicle, handle user interfaces, and monitor safety features.


• Connectivity EV chargers often include communication modules such as Ethernet switches, 5G routers, Wi-Fi modules, cellular modems, or other networking equipment. These modules enable communications with central management systems, user apps, and other charging stations.


• Sensors and safety devices DIN rail power supplies might provide power to sensors (such as current sensors, temperature sensors, and proximity sensors) and safety devices (like emergency stop buttons) that are part of the EV charger's safety mechanisms.


• Logic control circuits and relays Various logic and control circuits that manage the overall charging process, handle user interactions, and ensure safety are powered by these power supplies.


• HMI If the EV charger has a user interface like a LCD screen, touch panel, or LED indicators, the power supply can provide power to these components.


• Lighting, fans and other accessories Some EV chargers have integrated lighting to enhance visibility, especially at night. Some EV chargers are equipped with fans to improve heat dissipation. These components can be powered by DIN rail power supplies.


• Access control systems If the EV charger or charging station requires access control mechanisms like RFID readers or biometric sensors, these components could be powered by DIN rail power supplies.

Figure: an N+1 system design of a DC EV charger with two industrial switching power supplies.

The Power Supplies Most Chosen by Our EV Charger Customers

Delta’s EV charging station switched-mode power supply (SMPS) and DIN rail power supplies ensure maximum power in minimal space. They are recognized for their high power density, which is designed to meet industrial requirements and a wide range of operating temperatures, all while maintaining energy efficiency.

Our extensive range of power supplies allows us to offer tailor-made solutions to meet your specific needs. The CliQ M and CHROME Series, for instance, provide environmental resistance and fire safety options, making them suitable for diverse installation environments—whether in coastal areas prone to corrosion, compact urban settings, or locations demanding extra protection.

CliQ M Series DIN Rail Power Supplies

CliQ M Series is one of the most environmentally-resistant DIN rail power supplies on the market. It is DNV GL and ABS certified to operate in the maritime environment, making it ideal for EV chargers installed in coastal areas. Although the housing of EV chargers usually provides sufficient protection for their internal components, marine-grade durability adds extra reliability to the CliQ M Series in extreme conditions.

CHROME and CHROME II Series DIN Rail Power Supplies

Choose the CHROME or the latest CHROME II Series when you want to provide your EV chargers with additional protection against fire risks. Originally engineered for building automation applications, these Series are NEC Class 2 and Limited Power Source (LPS) approved, ensuring the highest level of fire safety. These Series are also ideal for EV chargers with limited internal space, as it has a smaller footprint than their counterparts.

Force-GT and LYTE II Series DIN Rail Power Supplies

Force-GT and LYTE II Series are general-purpose power supplies that meet most industrial requirements, including wide operating temperatures, space efficiency, and energy efficiency. The higher-end Force-GT Series also features 2/3-phase models for situations where greater power density is required. Notably, their built-in constant current circuit makes these power supply solutions ideal for EV charging applications.

The General-Purpose Power Supplies Most Chosen by Our EV Charger Customers

PJT Open Frame Power Supplies

DIN rail is a popular power supply format for centralized power system design. In case you need a distributed design, choose open frame power supplies with similar features. Open frame power supplies typically have a smaller footprint than DIN rail power supplies and are ideal for applications where space is limited. They offer the flexibility of mounting onto any surface, providing versatility in deployment for various applications.

Partner With Delta for Switching Power Supply for EV Chargers

If you are not sure which power supply is the best fit for each component, please do not hesitate to contact us. We will provide you with more details on how to choose the right model for each critical sub-system inside EV chargers. Delta’s extensive experience in the power supply industry and deep understanding of the needs of EV charger manufacturers, enables us to offer power supply solutions that are innovative and reliable.

We have a team ready to assist you in selecting the most suitable power supply for your EV charger, considering your needs and requirements for power, environmental conditions, thermal needs, space limitations, and budget. Contact us today to learn how Delta’s switching power supplies can enhance the efficiency and safety of your EV charging stations.