EVSE:- Electric Vehicle Supply Equipment
Within Breakfast Point this will generally be classified as a Type 2 “Charger” being the wall mounted hardware supplying power to the vehicle. These units provide a controlled source of AC electricity however the charging circuit converting AC voltage to DC voltage is contained within the vehicle. When installed on a single phase circuit these units will typically provide up to 7.4 kW of power at 32 amps. There may be limited applications for a common property EVSE unit using 3 phase power and these units can typically provide up to 22 kW with 32 amps on each phase. At this time high powered DC chargers are not likely to be installed within the Community and these would be a specialist installation.
OCPP:- Open Charge Point Protocol
The OCPP has been developed to allow products related to EV equipment from a wide range of manufacturers to operate as an integrated system. For example the DLM implementation from one manufacturer can talk to a range of different EVSE units from various manufacturers and the cloud based software from a range of billing providers should also communicate with the same DLM unit.
DLM:- Dynamic Load Management
A combination of hardware and software that monitors the total load on each phase of the main incoming power supply for the building/complex and determines what surplus power is available to distribute to the various EVSE units in use at the time. The DLM implementation also monitors the load going to each phase of all subsidiary connections providing power. i.e. You may have separate power cabling to each meter room or separate buildings which are all supplied from the main incoming supply. For this implementation all EVSE units must be compliant with OCPP which is the communication protocol that enables communication between the DLM and the EVSE units. Communication between the DLM and individual EVSE units controls the power supplied to each EVSE unit, depending on the surplus power available on the relevant phase. The DLM unit can have the capability to give priority to individual EVSE units depending on specific criteria. i.e. It may prioritise power going to those vehicles with the lowest battery levels. Refer:- https://www.thechargingproject.com/en/knowledge-centre/dynamic-and-static-load-management-explained/
Active Load Management, Individual EVSE Unit:-
The individual EVSE unit has the capability to monitor the total load being used in the associated dwelling and reduce the power available for charging in the event the total exceeds a predetermined limit. This predetermined limit can be set taking into account the nominal power availability for the phase on which the unit is installed. For instance if a jug is boiled in the Apartment then power to the EVSE unit would be automatically reduced to compensate. This type of unit is particularly suited for use with Lot Owners metered power and would be a necessary requirement where Lot Owners metered power is controlled by a “whole of building” DLM system.