Recorder reports unknown unit VA

[dhover]

Version of the custom_component

0.0.13

Configuration

Describe the bug

The recorder reports an unknown unit VA which is being used by the sunspec integration for the sensors:
sensor.solaredge_inverter_ac_apparent_power
sensor.fronius_inverter_ac_apparent_power

Debug log

Logger: homeassistant.components.sensor.recorder
Source: components/sensor/recorder.py:229
Integration: Sensor (documentation, issues)
First occurred: 2:12:00 PM (2 occurrences)
Last logged: 2:12:01 PM

sensor.solaredge_inverter_ac_apparent_power has unknown unit VA
sensor.fronius_inverter_ac_apparent_power has unknown unit VA

[dhover]

Issue #30 was already logged.