Home Assistant MG4

[jiiikoo]

Hey

So I got HA running and connected to my MG4, still learning most of the things but one thing I definitely wanted to have was graphing charging the battery in Grafana. I believe the sensor called "power" is what shows the speed of the charging but I noticed that it also then shows discharging as well, ie. when you drive and the battery charge goes lower.

Am I missing a sensor or is there not a dedicated sensor for the charging speed?

 

[siteguru]

I'll tag @wattmatters for feedback, as I'm pretty sure he does a lot of HA with his MG4.

 

[jiiikoo]

I'll tag @wattmatters for feedback, as I'm pretty sure he does a lot of HA with his MG4.

Oh amazing! I don't mind having to use the _power sensor per se, just find it strange that there's no other sensor on there that's just dedicated to actual charging. Or at least I'm not seeing one xD

I have loads of questions for @wattmatters lined up

 

[SteveMSJ]

It might depend on which integration you are using. I have a sensor called charging_power which shows just that.

 

[NLMGSAN]

It might depend on which integration you are using. I have a sensor called charging_power which shows just that.

And you are using which integration?

 

[jiiikoo]

It might depend on which integration you are using. I have a sensor called charging_power which shows just that.

I’m using HA in a Docker container and saicismartapi/saic-python-mqtt-gateway:latest with Mosquitto.

 

[SteveMSJ]

I’m using HA in a Docker container and saicismartapi/saic-python-mqtt-gateway:latest with Mosquitto.

I'm using the ad-ha/mg-saic-ha: MG SAIC Custom Integration for Home Assistant. There are pros and cons to the two integrations but I'm surprised the one you are using doesn't have the charging_power sensor. Perhaps ask on the github page for that integration.

 

[SteveMSJ]

I'm using the ad-ha/mg-saic-ha: MG SAIC Custom Integration for Home Assistant. There are pros and cons to the two integrations but I'm surprised the one you are using doesn't have the charging_power sensor. Perhaps ask on the github page for that integration.

This integration also has an instant_power sensor which shows the power to the motor or negative regeneration. I don't use it for anything as it is the value at a moment in time which isn't of much interest. Perhaps the other integration combined the two sensors into one, although I don't really see the purpose in that.

 

[wattmatters]

I'm using:

GitHub - SAIC-iSmart-API/saic-home-assistant-addon: SAIC-iSmart-API repository for Home Assistant OS (HASS.IO)

SAIC-iSmart-API repository for Home Assistant OS (HASS.IO) - SAIC-iSmart-API/saic-home-assistant-addon

github.com

There is no sensor just for charging power - the car reports the power flowing to/from the battery.

You could create a custom sensor which filters only for positive power and only when the car is at home.

I measure power and energy for the AC circuit supplying power to the EVSE I use to charge the car. That's from a different device/integration (Iotawatt).

I'm more interested in the power I have to actually supply to the car than in what the battery itself is consuming. Mine charges from excess solar PV.