Wallbox Manager

The Wallbox Manager block takes over the energy management of multiple Wallboxes.
It fulfills the following functions:

Load limitation
To prevent upstream fuses from tripping, all wallboxes and their electrical cabling structure can be replicated in the block. Both the total power and the power per fused strand can be limited.

Power distribution
Distributes the available power to all actively charging wallboxes, considering the predefined power limits.
If a wallbox is in Eco or Priority mode, but no charging session is active, the defined minimum charging power is allocated and vehicle charging is allowed. This does not affect the total assigned power "Ap". Once a charging session becomes active, the available power is redistributed among the wallboxes and added to "Ap".
By default, vehicles charge in Eco mode, sharing only the available excess power. Only vehicles charging in Priority mode are assigned as much power as possible.

Presetting costs
Definition of prices per kWh for charging in Eco and Priority modes, as well as a connection fee per hour. These prices are transferred to the linked Wallbox blocks.

User Interface
Shows an overview of the energy distribution with status and power of the linked Wallbox blocks.

Table of Contents


Abbreviation Summary Description Unit Value Range
Pmax Maximum total power Maximum total power available to the Wallboxes.
Used primarily as maximum value for overload protection.
Can also be used to restrict charging power during periods of high electricity prices or high consumption.
kW 0...∞
Peco Power for Eco charging Excess Power, which is distributed to the Wallboxes for Eco charging. kW 0...∞
Off Off Pulse: Outputs are reset / switched off.
On: Block is locked.
Dominating input.
The name of the connected sensor is used in the user interface.
- 0/1


Abbreviation Summary Description Unit Value Range
Cp Current power Current total power consumption of all Wallboxes.
For wallboxes whose power consumption is not known (no meter available or Cp input not used), the assigned power is assumed.
kW 0...∞
Ap Assigned Power Total power assigned to the wallboxes.
Sum of Tp of all linked wallboxes.
kW 0...∞
AC API Connector Intelligent API based connector.
API Commands
- -


Abbreviation Summary Description Unit Value Range Default Value
PrEco Price Eco Price per kWh for Eco charging. Currency 0.1
PrPrio Price Priority Price per kWh for Priority charging. Currency 0.2
Cfp Connection fee per hour Price per hour while the vehicle is connected. Currency 0


Summary Description Value Range Default Value
History Entries Number of entries in the control history.
0: History is disabled
Control history tracks relevant changes since program start.
0...100 20
Configure... Configure the Wallbox Manager by adding Wallboxes and grouping them together. - -


First, existing Wallbox blocks are added in a tree structure and grouped into strands. A strand is a group of wallboxes that are protected by a common higher-level fuse. The power can be limited for the individual strings. Select a value that matches the fuse protection or load capacity of the string:

As soon as a Wallbox block has been added, only two fixed charging modes (Eco and Priority) are available. The energy distribution is controlled by the Wallbox Manager.

The maximum power and the excess power available for Eco charging must be specified at the inputs of the Wallbox Manager: