tinkerers with too much time on their hands have finally figured out how to set the current draw on my EV charger, so now I can get #HomeAssistant to make our car only charge off excess solar energy when we don't need an urgent full charge.
Even on NEM2 in California, there's still a $2.46 out of pocket cost for every 100% charge of our car. That's not nothing!
@chrisjrn Nice. I want to have something like this one day, unfortunately I can’t have a charger at home. One day I’ll have my own driveway :)
@chrisjrn this is nice. My VW doesn't have a good integration, so I have something cobbled together with my Emporia charger.
@chrisjrn Oooh, nice!
Any chance you could share the YAML for the automation?
@chrisjrn I _LOVE_ this dashboard, yay Homeassistent!
@jezdez It is _so nice_ to be able to make a dashboard that both saves me money AND actually reduces environmental impact
@nanianmichaels with a bit of tidying up, yes!
@Myphatself The only part of this that depends on the car itself is tracking the charge level (so I can charge to 40% off the grid at full current). Everything else is tracking the power demand from our meter and setting the current on the charger.
@chrisjrn that works. I use the "solar charge only' mode through Emporia for general charging and I put a bypass button in Home Assistant if we want to pay to charge. I'd like to be able to show how much charge is on the car.
@Myphatself For what it's worth, my polestar reports the drivetrain battery charge over the OBD port, so you could likely get that to transmit with something like https://www.home-assistant.io/integrations/torque/
@Myphatself (if, instead of Torque, you might be able to rig up a bluetooth proxy and read off the bluetooth device directly; not entirely sure what's involved there)
@chrisjrn good idea. Ive used Torque before with other vehicles. I did find a general car module from HACS.
@chrisjrn the neighbors Rivian I can't keep out of my HA. I know when he is home and how far away his truck and keys are.
@martijn Yeah, definitely counting my luck there. Having the driveway, and the (abundant) solar to power my charger off is a big deal.
