# Work Efficiency

> Symcon documentation · English · generated on 2026-09-26  
> Index: https://www.symcon.de/en/llms.txt

Source: https://www.symcon.de/en/service/documentation/module-reference/energy/work-efficiency/

_Requires Symcon >= 6.3_

The efficiency is calculated.

### function scope

* The efficiency for the past 365 days
* The efficiency for the past 30 days

### software-installation

Using the Module Store, install the 'work efficiency' module.

### Setting up the instances in IP-Symcon

 Under 'Add Instance' the 'Work efficiency' module can be found using the quick filter.
	- More information about adding instances in the [Instances documentation](../concepts.md)

#### configuration page

| name                    | description                         |
| ----------------------- | ----------------------------------- |
| Thermal energy (kWh)    | Variable logged as counter          |
| Electrical Energy (kWh) | Variable which is logged as counter |

### status variables

The status variables are created automatically. Deleting individual ones can lead to malfunctions.

| Name      | Type  | Description                                         |
| --------- | ----- | --------------------------------------------------- |
| SPF Month | Float | Stands for the sessional performance facto on month |
| SPF Year  | Float | Stands for the sessional performance factor on year |

## ARZ_Calculation

Source: https://www.symcon.de/en/service/documentation/module-reference/energy/work-efficiency/arz-calculation/

`bool ARZ_Calculation(int $InstanceID)`

_Requires Symcon >= 6.3_

**Parameters**

- `$InstanceID` (int): Instance ID

**Returns** (bool): If the command could be executed successfully, it returns __TRUE__ as result, otherwise __FALSE__.

Instance ID

**Example**

```php
ARZ_Calculation(12345)
```