MQTT separate imported/exported grid energy

[filipSu]

Is your feature request related to a problem? Please describe.
For integration purposes (specifically with Homey), it would be nice to have grid energy separated into imported and exported values. Right now, only gridEnergy property is exposed, which as I understand it, means imported energy.

Describe the solution you'd like
Expose gridEnergyImported and gridEnergyExported through MQTT integration

[andig]

We don't collect these values, hence can't export them :(

[filipSu]

@andig and would it be a problem to start collecting them? A lot of power meters expose these values (f.e. my deye 3p inverter). Because it is a very valuable information when you want to easily analyze your energy usage over a longer period of time, so in my opinion it fits to the overall purpose of evcc as a service

[andig]

Not a problem per se but a big change- without use for evcc.