The two possible meter types are:
- S0 - Charge station
The following are possible units defined in OCPP.
Allowable values of the optional "unit" field of a Value element, as used in MeterValues.req and
StopTransaction.req messages. Default value of "unit" is always "Wh
|wH||Watt-hours (energy). Default.||Common|
|varh||Var-hours (reactive energy).|
|kvarh||kilovar-hours (reactive energy).|
|VA||VoltAmpere (apparent power).|
|kVA||kiloVolt Ampere (apparent power).|
|var||Vars (reactive power).|
|V||Voltage (r.m.s. AC).||Common|
|kvar||kilovars (reactive power).|
|K||Degrees Kelvin (temperature).|
OCPP defines different measurands that can be passed on through meter values.
The key value in most cases is the Energy.Active.Import.Register or simply 'Energy (consumed)" as represented in the EvPortal.
|Value Description||Description||Used in GFX|
|Current.Export||Instantaneous current flow from EV|
|Current.Import||Instantaneous current flow to EV||Yes|
|Current.Offered||Maximum current offered to EV|
|Energy.Active.Export.Register||Energy exported by EV (Wh or kWh)|
|Energy.Active.Import.Register||Energy imported by EV (Wh or kWh)||Yes|
|Energy.Reactive.Export.Register||Reactive energy exported by EV (varh or kvarh)|
|Energy.Reactive.Import.Register||Reactive energy imported by EV (varh or kvarh)|
|Energy.Active.Export.Interval||Energy exported by EV (Wh or kWh)|
|Energy.Active.Import.Interval||Energy imported by EV (Wh or kWh)|
|Energy.Reactive.Export.Interval||Reactive energy exported by EV. (varh or kvarh)|
|Energy.Reactive.Import.Interval||Reactive energy imported by EV. (varh or kvarh)|
|Frequency||Instantaneous reading of powerline frequency||Yes|
|Power.Active.Export||Instantaneous active power exported by EV. (W or KW)|
|Power.Active.Import||Instantaneous active power imported by EV. (W or KW)||Yes|
|Power.Factor||Instantaneous power factor of total energy flow||Yes|
|Power.Offered||Maximum power offered to EV||Yes|
|Power.Reactive.Export||Instantaneous reactive power exported by EV. (var or kvar)|
|Power.Reactive.Import||Instantaneous reactive power imported by EV. (var or kvar)|
|RPM||Fan speed in RPM||Yes|
|SoC||State of charge of charging vehicle in percentage||Yes|
|Temperature||Temperature reading inside Charge Point.||Yes|
|Voltage||Instantaneous AC RMS supply voltage||Yes|
Meter Values can be sent by the Charge Station at different moments.
Typically there are Meter Values at the beginning and end of a Transaction:
Meter Values can be sent based either:
- Sample.periodic - meter values are sent only during an active session
- Sample.Clock - meter values are sent every clock aligned interval, e.g. every 15mins, regardless of an ongoing transaction or not.
|Interruption.Begin||Value taken at start of interruption.|
|Interruption.End||Value taken when resuming after interruption.|
|Other||Value for any other situations.|
|Sample.Clock||Value taken at clock aligned interval.|
|Sample.Periodic||Value taken as periodic sample relative to start time of transaction.|
|Transaction.Begin||Value taken at end of transaction.|
|Transaction.End||Value taken at start of transaction.|
|Trigger||Value taken in response to a TriggerMessage.req|
Filtering on phases
If a Charge Station has three phases, typically it will send 4 metervalues relating to kWh:
In most cases, Users are not interested in the individual phase, but the 'total' of the Charge Station.
To select the 'total', you should filter on 'none'
Updated 5 months ago