I have my EV charging integrated and my prices change every 5 minutes.
I set EV_total_hours based on the difference between the charge limit and current state of charge divided by my charging rate. If the EV isn’t plugged in I set the hours to 0.
With my EV automation I set the charging_amps based on the power level planned by EMHASS.
Here is my plan for tomorrow, I charges the home battery once solar starts production, waits for the cheapest of the day and starts charging the EV from grid and solar, then you can see in the afternoon the. EV charging curve follows the solar curve to consume all excess production.
- name: def_total_hours_ev
unique_id: 7663c831-7d49-4d62-a358-d743ddd25284
state:
"{{max(0,is_state('automation.p_deferreable3_automation_ev_tessie','on')|abs
* (is_state('sensor.m3p_t_charging', ['charging', 'stopped']) | abs)
* (70*(states('number.m3p_t_charge_limit')|int(0) - states('sensor.m3p_t_battery_level')|int(0))/100
* (is_state('device_tracker.m3p_t_location_2','home')|abs)
/ states('sensor.p_nom_ev')|float(0.001)*1000 +0.5)|float(0)|round(0) + states('input_number.ev_boost_hours')|int(0))}}"
