Plant data (with Hybrid EMS)

Last modified: 27 Mar 2025

Under Power control > Plant data, you can select whether you want to control a PV plant, a battery plant, or both. This overview is divided into several areas, which are explained in more detail below:

1. General data

Configure the relevant electrical characteristics of your plant under Plant data > General data.

Select the type of plant

Activate the toggle for PV, battery, or both. Depending on your selection, different fields will be displayed, and the range of functions will vary:

PV and Battery: All major functions are available: setpoint command, PV-self consumption, band shaving, and SOC limitation. See Active power: Description of functions.
Battery: Only setpoint command, band shaving, and SOC limitation are available.
PV: Only setpoint command is available.

Note

Select the plant type first to ensure that your subsequent power control configurations will work properly. For example, the active power mode PV self-consumption will only work if both PV and Battery are activated.

Configure parameters

Select a parameter to view more details:

Agreed connected active power Pav

Connected active power of the power generating system agreed upon by the grid operator and subscriber.

Amount of power you are allowed to feed into the grid as agreed with the grid operator.

For example, you may have 9000 kW of installed power, but you are only allowed to feed in 1000 kW (agreed active power).

Agreed supply voltage Vc

The voltage at the point of common coupling (PCC) as agreed upon by the grid operator and the subscriber. In most cases, this matches the nominal system voltage (V_n), but if a different voltage is specified in the agreement, that value is used as V_c.

Agreed connected apparent power Sav

The apparent power of the power generating system, which is calculated as the quotient of agreed connected active power P_av and the lowest power factor cos φ agreed upon by the grid operator and subscriber.

Nominal system frequency Fn

Nominal value of the grid frequency.

Total installed active power Pinst

The sum of the nominal power of every power generating unit within the power generating system.

Total maximum apparent power Smax

Sum of the maximum AC apparent power of all power generating units within the power generating system

Select feed-in meter

A feed-in meter must always be selected. Otherwise power control cannot be started

2. PV plant

Configure your PV plant's electrical data and characteristics under Plant data > PV plant.

Configure parameters

Select a parameter to view more details:

Maximum apparent power Smax,PV

Sum of the maximum AC apparent power of all the power generating units within the PV plant.

Number of active inverters

All PV inverters connected to a blue'Log which exceed a configured threshold of a delivered measured value. If the blue'Log XC is configured as a master, the number of inverters connected to slaves will also be considered.

An inverter is "active" once the threshold of current or power is exceeded.

Selection of measurement value of the inverter: Select a relevant measured value, either AC power in kW or current in A.

Note

Not all inverters provide current AC as a measured value.

Configuration of the threshold: Define the minimum value in kW.

3. Battery plant

Configure your battery plant's electrical data and characteristics under Plant data > Battery.

Configure parameters

Select a parameter to view more details:

Maximum apparent power Smax,bat

Sum of the maximum AC apparent power of all power generating units within the battery plant.

Maximum charge power Pmax,charge

Sum of the maximum charge active power of all power generating units within the battery plant.

Maximum discharge power Pmax,discharge

Sum of the maximum discharge active power of all power generating units within the battery plant.

4. Advanced plant data

Under Advanced plant data, you can configure irradiance and temperature sensors to make their data points accessible via Modbus.

Prerequisites

Sensors must be configured under Devices > Sensors.
The Modbus Power Control or Remote Power Control license is required to access these data points. See License and data sheets: Downloads - meteocontrol GmbH.

Configure sensor for output of global irradiation

Here you can assign an irradiance sensor to a master or slave device.

The number of sensors varies depending on the operating mode of the controller (standalone, master, slave).
Gear icon: If a device has several irradiance sensors, select the measured value to be forwarded via Modbus, e.g. irradiance W/m².
Advanced settings: Modbus assumes that irradiance sensors are mounted horizontally. If the sensor is mounted at an incline (for example, on a PV module), activate the toggle and enter the inclination angle (in degrees) of the sensor.

Configure sensor for output of ambient temperature

Here you can assign a temperature sensor to a master or slave device.

Gear icon: If a device has multiple temperature sensors, select the measured value to be forwarded via Modbus, e.g. temperature.