# VARTA element backup

Source: https://docs.evcc.io/fr/meters/varta-element-backup

PV is only available with an additional PV sensor, as the power of the devices registered in the SUNSPEC Manager is not output via Modbus. Element backup requires at least firmware version F21000612. The firmware update is not rolled out automatically, but can be released upon request by VARTA's technical service.

## Paramètres

| Nom | Description | Par défaut / exemple | |
| --- | --- | --- | --- |
| modbus | Modbus Type (tcpip) |  |  |
| capacity | Battery capacity | 50 kWh |  |
| minsoc | Minimum charge Lower limit as configured on the battery system. Used by optimizer. | 0 % |  |
| maxsoc | Maximum charge Upper limit as configured on the battery system. Used by optimizer and for grid charging. | 100 % |  |
| maxchargepower | Maximum charge power For forced charging of the battery. |  W | avancé |
| maxdischargepower | Maximum discharge power Maximum discharge power of the storage. | 4000 W | avancé |
| watchdog | Watchdog | 120s | avancé |

## Exemple de configuration pour evcc.yaml

```yaml
meters:
    - name: my_grid
      type: template
      template: varta
      usage: grid
      
      # Modbus TCP
      modbus: tcpip
      id: 255
      host:  # Hostname
      port: 502 # Port
```

```yaml
meters:
    - name: my_pv
      type: template
      template: varta
      usage: pv
      
      # Modbus TCP
      modbus: tcpip
      id: 255
      host:  # Hostname
      port: 502 # Port
```

```yaml
meters:
    - name: my_battery
      type: template
      template: varta
      usage: battery
      
      # Modbus TCP
      modbus: tcpip
      id: 255
      host:  # Hostname
      port: 502 # Port
      capacity: 50 # Battery capacity (kWh), optional
      minsoc: 0 # Minimum charge (%), Lower limit as configured on the battery system. Used by optimizer. (optional)
      maxsoc: 100 # Maximum charge (%), Upper limit as configured on the battery system. Used by optimizer and for grid charging. (optional)
      maxchargepower: # Maximum charge power (W), For forced charging of the battery. (optional)
      maxdischargepower: 4000 # Maximum discharge power (W), Maximum discharge power of the storage. (optional)
      watchdog: 120s # Watchdog, optional
```