OCPP MeterValues are sent every 1kWh of energy used or every 15 minutes, whichever comes first. This means that while charging you will receive updated MeterValues every seven minutes on 1-phase and every three minutes on 3-phase.
|Charge Rate||MeterValue Frequency|
|7.4 kW (1-phase)||7 minutes|
|22 kW (3-phase)||3 minutes|
|less than 1kWh consumed||15 minutes|
Although we support the MeterValueSampleInterval key, changing this will not increase the frequency that MeterValues are received past what is outlined above. However, if you set this value to every 15 minutes or longer it will always be received in those time intervals regardless of how much is consumed.
The reason we have our MeterValue frequency set like this is to ensure we can keep the mobile data connection free for the life of the unit. With increased traffic there would be an increase in costs and we may not be able to maintain this.