EV Charger Selection Quick Guide: Home vs. Public Charging

Driven by the goal of carbon neutrality, new energy vehicles (NEVs) are speeding up their entry into millions of households. As the "energy refueling stations" for electric vehicles (EVs), charging stations are not only carriers of technological innovation but also a vital component of smart city ecosystems. As an industry-leading provider of charging solutions, ATESS is committed to delivering efficient, safe, and intelligent products, offering comprehensive charging support for individuals, businesses, and public sectors. This article will deeply analyze the core technology, selection strategies, and application scenarios of EV charging stations, helping you unlock a new experience in green travel.

1. How is Electricity Fed to Electric Vehicles

1.1 The Underlying Logic of EV Charging Energy Conversion 

At its essence, an EV charging station is an "energy adapter," with its primary task being the conversion of high-voltage alternating current (AC) from the power grid into direct current (DC) that matches the characteristics of an EV’s battery. This process unfolds in three key stages:

• Power grid access and voltage stabilization: connect 400V/230V power grid through cable, and eliminate voltage fluctuation through rectification and filtering;

• Power Electronics Conversion: Insulated Gate Bipolar Transistors (IGBT) or Silicon Carbide (SiC) modules are employed for AC-to-DC conversion, achieving efficiencies exceeding 97%.

• Dynamic Matching and Regulation: Through BMS (battery management system) real-time interactive data, automatically adjust the output voltage (150-1000 V), and current (10-600A), to achieve "vehicle-station-cloud" collaborative optimization.

1.2 Types of EV Charging Stations

According to the location in the process of electrical energy conversion, EV charging stations are classified into two categories: AC EV charging stations and DC EV charging stations.

• AC EV Charging Stations: These rely on the vehicle’s onboard charger (OBC) to perform energy conversion. The AC EV charging stations simply transmit electricity, delivering grid AC power to the OBC, which then convert it into DC to charge the vehicle’s battery. These stations typically integrate control, safety, and user interaction modules. Charging power typically ranges from 3.7-22kW.

• DC EV Charging Stations: As known as the off-board charger, it not only has a control module, safety module, and user interaction module, but also carries power modules. It performs electrical energy conversion (AC/DC) inside the charging station, directly transmitting direct current to the power battery for charging the vehicle. By paralleling multiple power modules, a high charging power can be achieved, generally ranging from 20 to 480 kW.

Comparison of AC and DC EV charging stations:

2. Scenario-Based Solutions: A Comprehensive Charging Network from Homes to Cities

2.1 Home Users: Private Slow Charging, Economical and Convenient

Recommended Model: NOVO EVA-07/11/22S-P/S (AC 7/11/22kW single-output EV charging station)

Solution Highlights:

• Supports app-based charging reservations, leveraging off-peak electricity rates at night to reduce costs by 40% per charge.

• IP54 protection rating, weatherproof against rain and snow, suitable for outdoor parking spaces.

• RFID card authentication prevents unauthorized use.

  
  

2.2 Public Parking Lots: Building an Energy Network, Charging Anytime, Anywhere

Recommended Model: NOVO EVA-07/11/22D-S/P/SEW/PEW (AC 7/11/22kW Dual-output EV charging station)

Solution Highlights:

• Dual output saves installation space.

• Available in floor-standing or wall-mounted designs for flexible installation.

• Optional smart management system (Multi-charge Manager) dynamically allocates charging power within the site.

  
  

2.3 Large Shopping Malls: DC Fast Charging, Value-Added Services

Recommended Model: EVD-200D-X (DC 80-200kW dual-gun EV charging station)

Solution Highlights:

• Modular design for easy maintenance.

• 1-2 hours charging time aligns with user travel schedules.

• POS payment system tailored for commercial use.

2.4 Highways: DC Supercharging, Rapid Energy Replenishment

Recommended Model: REVO EVD-360D/EVD-480D (DC 240-360/400-480kW dual-gun EV charging station)

Solution Highlights:

• 10-minutes charge delivers 400 km of range, eliminating range anxiety.

• Supercharging increases daily vehicle service capacity per station.

• The cable management system simplifies the charging process.

Whether it’s meeting the personalized needs of home EV owners or planning city-scale charging networks, ATESS Power offers a full range of charging solutions covering all power segments (AC 7-22kW, DC 20-480kW).  

Visit the ATESS official website to explore our product portfolio, and contact us for a customized charging solution tailored to your unique requirements. Act now to seize the opportunities of the green economy!  

Website: www.atesspower.com