Standards and Specifications

Standards

Standards ensure interoperability and compatibility of any Electric Vehicle Supply Equipment (EVSE) with all electric vehicles (EVs). Central Electricity Authority (CEA) and The Bureau of Indian Standards (BIS), the national standards body of India, is responsible for formulating electric vehicle (EV) charging standards for the country. Another important association for developing standards is Automotive Research Association of India (ARAI). ARAI develops standards for vehicles and its components.

BIS Standards for electric vehicle Charging

BIS is a member of the International Electrotechnical Commission (IEC), which is the global body that is developing reference standards to ensure interoperability and minimize trade barriers for electric vehicles and their components. While Indian standards for electric vehicle charging are compliant with global standards, local climate considerations and the difference in vehicle types available in the country necessitate modifications that are specifically applicable to India.

Indian Standards For AC Charging

  • IS 17017 is the key electric vehicle charging standard in India comprising three parts and six sections. IS-17017- Part-1 provides the basic features of all electric vehicle charging systems. An AC EVSE must adhere to this standard, and specific AC connector standard in the IS-17017-Part-2. Both AC and DC EVSE need to conform to the technical standards IS-17017-Parts 21 & 22. Additional Indian standards for AC EVSEs have been approved for light electric vehicles and e-cars (in the form of low-cost charging points), for use in parking areas.

Indian Standards For DC Charging

  • IS-17017-Part-23 describes the requirements for DC charging stations, with power output of 50kW to 200kW. Beyond this, high power charging standards are required to cater to buses and other heavy vehicles. Recently, the BIS has finalized the IS-17017-Part-25, which is specifically for providing low DC power of less than 7kW for light EVs. Due to the requirement of digital communications between the DC EVSE and the EV, data communication standards are specified in IS-17017-Part 24. When the Combined Charging System (CCS) standard is deployed, which can provide both AC and DC charging, communications will be as per the IS-15118 series.

Indian Standards For battery swapping

  • Separate projects have been initiated for battery swapping standards for LEVs and buses. They will be two series of standards documents, covering the form factor of the battery pack, inter-operable connection systems, communication between the battery management system (BMS) and the EV and charging station, and network management. Any electric vehicle may utilize a battery pack conforming to these standards. The removable battery packs can be charged using AC or DC charging systems. The BIS is yet to develop Indian standards for EV roaming and grid-related management functions.

Central Electricity Authority (CEA) Standards

Central Electricity Authority seeks to make technical standards & regulations in the power sector of the country. CEA is primarily responsible for standards related to safety of power grid.

Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations

  • CEA Measures relating to safety and electric supply regulations include: General safety requirement for electric vehicle charging station Earth protection system for charging stations Requirement to prevent fire for electric vehicle charging stations Testing of charging stations Inspection and periodic assessment of charging stations Maintenance of records International Standard for charging stations

To find more about CEA measures relating to safety and electric supply, click below.

CEA SAFETY AND ELECTRIC SUPPLY MEASURES 🡪

Central Electricity Authority (Technical Standards for Connectivity of Distributed Generation Resources) :

  • These regulations are applicable to all the generating companies or persons owning distributed generation resource, which are connected to or seeking connectivity with the electricity system

To find more about CEA technical standards for connectivity of distributed generation resources, click below.

CEA TECHNICAL STANDARDS 🡪

Automotive Research Association of India (ARAI)

ARAI develops standards for vehicles and its components. These standards are marked as AIS-XXX standards. AIS-138 Part 1 specifies the charging requirements for AC Charging and AIS-138 Part 2 specifies the charging requirements for DC Charging for all electric vehicles (2/3/4) wheelers with the exception of trolley buses, rail vehicles and off-road industrial vehicles. As selection of equipment is critical in setting-up of electric vehicle charging station, mentioned below are the mandates required as per government as well as the AIS-Standard:

GOVERNMENT MANDATES:

  • Equipment selection for the charging station must be in line with the government guidelines. For public electric vehicle charging stations, Ministry of Power (MoP) notified its guidelines in October 2019. Key requirements mentioned therein are summarized below:
    • The charging station should have an exclusive transformer with all related substation equipment, including safety appliance
    • The charging station should include 33/11 kV lines/cables and associated equipment, including line termination etc.
    • The charging station must have appropriate cabling and electrical work ensuring safety
    • The charging station must have adequate space for charging and entry/ exit of vehicles
    • The charging station should have any of the chargers shown below:
    • The charging station must tie-up with at least one online Network Service Provider (NSP) to enable advance remote/ online booking of charging slots.
    • EVSE (electric vehicle supply equipment) shall be type tested by a third-party lab accredited by National Accreditation Board for Testing and Calibration Laboratories (NABL)

ARAI standards- AIS 138 Part 1 for EV conductive AC charging system

  • This standard applies to charging electric road vehicles at standard a.c. supply voltages (as per IS 12360/IEC 60038) up to 1000 V and for providing electrical power for any additional services on the vehicle if required when connected to the supply network. Electric road vehicles (EV) implies all road vehicles (2/3/4 Wheelers), including plug in hybrid road vehicles (PHEV), that derive all or part of their energy from on-board batteries.
  • The aspects covered include characteristics and operating conditions of the supply device and the connection to the vehicle, operators and third party electrical safety, and the characteristics to be complied with by the vehicle with respect to the EVSE-AC, only when the electric vehicle is earthed.
  • Requirements for specific inlet, connector, plug and socket-outlets for electric vehicles are referred in AIS-038(Rev.1). This standard does not cover all safety aspects related to maintenance. This standard is not applicable to trolley buses, rail vehicles and off-road industrial vehicles

To find more about AIS 138 Part 1, click below.

AIS 138 PART 1 🡪

ARAI standards- AIS 138 Part 2 for EV conductive DC charging system

  • This standard gives the requirements for DC electric vehicle (EV) charging stations, also referred to as "DC charger", for conductive connection to the vehicle, with an AC or DC input voltage up to 1000 V AC and up to 1500 V DC (as per IS 12360/IEC 60038).
  • This standard includes information on electric vehicle for conductive connection, but limited to the necessary content for describing the power and signaling interface. This part covers DC output voltages up to 1500 V. This standard does not cover all safety aspects related to maintenance.
  • This standard provides the general requirements for the control communication between a DC electric vehicle charging station and an electric vehicle. The requirements for digital communication between DC electric vehicle charging station and electric vehicle for control of DC charging are defined in this standard.
  • This standard also applies to digital communication between a DC electric vehicle charging station and an electric road vehicle (EV) for control of DC charging, with an AC or DC input voltage up to 1000 V AC and up to 1500 V DC for the conductive charging procedure. The electric vehicle charging mode is external DC.

To know more about AIS 138 Part 2,

click here

Specifications

Technical specifications for electric vehicle chargers vary across Level 1, Level 2, and Level 3 charging stations across different countries. Table below showcases the mapping of different charger specification in India:

S. No Charging Station Voltage (V) Power (kW) Type of Vehicle Type of compatible charger
1 Level 1 (AC) 240 <=3.5 kW 4w ,3w,2w Type 1, Bharat AC-001
2 Level 1 (DC) >=48 <=15 kW 4w,3w,2w Bharat DC-001
3 Level 2 (AC) 380-400 <=22 kW 4w,3w,2w Type 1, Type 2, GB/T ,Bharat AC-001
4 Level 3 (AC) 200-1000 22 to 4.3 kW 4w Type 2
5 Level 3 (DC) 200-1000 Up to 400 kW 4w Type 2, CHAdeMO,CCS1,CCS2
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