1 Scope
1.1 General
This Standard specifies a test method for calculating the energy efficiency of electric vehicle supply equipment (EVSE) for direct current fast charging (DCFC) across a full range of load conditions. It defines operating modes, and provides energy efficiency minimum requirements for these operating modes.
Note: Many owners and operators of DCFC are concerned with the amount of non-dispensable energy these chargers consume in no vehicle mode, especially in the winter when auxiliary heaters are often used. It is recognized that no vehicle mode power during cold temperature has not been a major consideration for charger efficiency because, to date, energy efficiency testing has been typically performed only at room temperature and full-rated load. This Standard seeks to provide an understanding of a given DCFC’s energy efficiency.
1.2 Included in this Standard
This Standard applies to AC three-phase and single-phase powered EVSE for DCFC between 20 kW to 350 kW of rated power output to a vehicle connector.
Note: The typical configurations are
a)
discrete unit — where the power conversion, user interface, communication, and control are all integrated into a single unit. These are intended to be tested as a standalone unit;
b)
central cabinet and dispenser(s) — these are intended to be tested as a combination of one cabinet and at least one dispenser, including if one dispenser is incorporated as part of the cabinet; and
c)
hybrid — these can behave as a discrete unit on AC power and also connected to an external DC power source. These configurations should be tested twice — once as discrete unit and once at peak capacity (with the addition of DC supply) as central cabinet and dispenser.
1.3 Excluded from this Standard
This Standard excludes wireless power transfer devices, pantograph style devices, and DC-powered devices.
1.4 Terminology
In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option that is permissible within the limits of the standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or and may be written as requirements.
Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.