Elbil og opladning

Intelligent opladning af Nissan Leaf med solenergi

Jeg har opsat et smart og fleksibelt system, der oplader min Nissan Leaf med overskudsstrøm fra solcellerne. Systemet bruger en ETEK EKEPC2 EV ladekontrolenhed, som styres via ESPHome og Home Assistant.

Hvordan fungerer det?

• ETEK EKEPC2 taler Modbus RTU.
• En ESP8266 (Wemos D1 Mini) kører ESPHome og håndterer al kommunikation.
• Home Assistant overvåger og styrer automatisk opladning baseret på solproduktion.

Funktioner:

• Start/Stop opladning fjernstyret via ESPHome og Home Assistant
• Statusindikatorer: klar, tilsluttet, lader, fejl
• Temperatur, spænding og PWM duty cycle aflæsning
• Web interface direkte på ESP-enheden

Komponenter

Producentens side for laderen: ETEK EKEPC2 EV

ESPHome-koden

esphome:
  name: ev-charger
  friendly_name: ev_charger

esp8266:
  board: d1_mini

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "G0qTV5ILLwbNmakxFwXOnNAzYsDbgMRAF/V/Bot4fIE="

ota:
  - platform: esphome
    password: "aa20e1c24135c9a6c4a310ce768213f0"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Ev-Charger Fallback Hotspot"
    password: "lqsjJtQU67Jj"

captive_portal:

    
binary_sensor:
  - platform: status
    name: "ESP Status"
    
switch:

  - platform: restart
    name: "ESP Restart"

time:
  - platform: homeassistant
    id: esptime

web_server:
  local: true

uart:
  id: modbus_serial
  tx_pin: 5 # D2 ESP8266 tx pin for soft serial uart
  rx_pin: 4 # D1 ESP8266 rx pin for soft serial uart
  #rx_buffer_size: 512 
  baud_rate: 9600
  stop_bits: 1
  #debug:
  #    direction: BOTH
  #    dummy_receiver: true

modbus:
  flow_control_pin: 0
  id: modbus1
  uart_id: modbus_serial
  send_wait_time: 10ms

modbus_controller:
  - id: ETEK
    update_interval: 5s
    address: 255
    command_throttle: 100ms
    setup_priority: -10
    modbus_id: modbus1
    max_cmd_retries: 0

text_sensor:
  - platform: template
    name: "Current working status text"
    id: status_text
  - platform: template
    name: "Current working status desc"
    id: status_desc
  - platform: template
    name: "Remote start and stop"
    id: status_mode

output:
  - platform: modbus_controller
    modbus_controller_id: ETEK
    address:  255
    register_type: holding
    value_type: S_WORD
    id: WallBoxStartStop

button:

  - platform: template
    id: ChargeStop
    name: "Remote start"
    on_press:
      then:
        - lambda: |-
            modbus_controller::ModbusController *controller = id(ETEK);
            modbus_controller::ModbusCommandItem ChargeStop = modbus_controller::ModbusCommandItem::create_write_single_command(controller, 0x59, 1);
            controller->queue_command(ChargeStop);


  - platform: template
    id: ChargeStart
    name: "Remote Stop"
    on_press:
      then:
        - lambda: |-
            modbus_controller::ModbusController *controller = id(ETEK);
            modbus_controller::ModbusCommandItem ChargeStart = modbus_controller::ModbusCommandItem::create_write_single_command(controller, 0x59, 2);
            controller->queue_command(ChargeStart);

sensor:

  - platform: uptime
    name: "ESP Uptime"
    unit_of_measurement: "s"
  - platform: modbus_controller
    name: "Remote start and stop Internal" 
    address: 0x59  #Remote start and stop (0 invalid, 1 start, 2 stop)
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    internal: true
    on_value:
          then:
            lambda: |-
               if (x == 0)        {id(status_mode).publish_state("0-Invalid");  }
               else if (x == 1)   {id(status_mode).publish_state("1-Start");    }
               else if (x == 2)   {id(status_mode).publish_state("2-Stop");     }
               else {id(status_mode).publish_state("other");}
       
  - platform: modbus_controller
    name: "Current working status"
    address: 0x8D  #Current working status
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    skip_updates: 0
    on_value:
      then:
        lambda: |-
          if (x == 0)        {id(status_text).publish_state("0-Fault--1#");    id(status_desc).publish_state("Power self detect failed");  }
          else if (x == 1)   {id(status_text).publish_state("1-Ready");        id(status_desc).publish_state("CP disconnection");  }
          else if (x == 2)   {id(status_text).publish_state("2-RFID Waiting"); id(status_desc).publish_state("Waiting for IC card");  }
          else if (x == 3)   {id(status_text).publish_state("3-Connected");    id(status_desc).publish_state("CP connect to diode+2.7KQ");  }
          else if (x == 4)   {id(status_text).publish_state("3-Connected");    id(status_desc).publish_state("CP connect to diode+1.3KQ");  }
          else if (x == 5)   {id(status_text).publish_state("5-Charging");     id(status_desc).publish_state("CP connect to diode+2.7KQ parallel connect1.3KO");  }
          else if (x == 6)   {id(status_text).publish_state("6-Fault--2#");    id(status_desc).publish_state("CP connect to diode+2.7KQ parallel connect 1.3KQ parallel connect 270F ...");  }
          else if (x == 7)   {id(status_text).publish_state("7-Fault--3#");    id(status_desc).publish_state("CP line short circuit with PE line");  }
          else if (x == 8)   {id(status_text).publish_state("8-Fault--4#");    id(status_desc).publish_state("RCMU occurs residual current or self detect failed");  }
          else if (x == 9)   {id(status_text).publish_state("9-Fault--5#");    id(status_desc).publish_state("Diode short circuit (Requirement waiting the CP disconnected)");  }
          else if (x == 10)  {id(status_text).publish_state("10-Fault--6#");   id(status_desc).publish_state("PP line disconnection");  }
          else if (x == 11)  {id(status_text).publish_state("11-Fault--7#");   id(status_desc).publish_state("Electromagnetic Lock failed");  }
          else if (x == 12)  {id(status_text).publish_state("12-Fault--8#");   id(status_desc).publish_state("IC card failed");  }
          else if (x == 13)  {id(status_text).publish_state("13-Fault--9#");   id(status_desc).publish_state("Circuit overload,DLB Mode activated");  }
          else if (x == 13)  {id(status_text).publish_state("19-Remote stop"); id(status_desc).publish_state("Remote stop");  }
          else               {id(status_text).publish_state("Unknown");        id(status_desc).publish_state("");  }
  - platform: wifi_signal
    name: "WiFiSignalWallBox"
    update_interval: 360s

  - platform: modbus_controller
    name: "Temp"
    address: 0x9d
    unit_of_measurement: "ºC"
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    #accuracy_decimals: 1
    filters:
     - multiply: 0.1
    device_class: temperature
    skip_updates: 5

  - platform: modbus_controller # CP positive voltage
    name: "CP positive voltage"
    address: 0x99
    unit_of_measurement: "V"
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    device_class: voltage
    skip_updates: 5

  - platform: modbus_controller # CP negative voltage
    name: "CP negative voltage"
    address: 0x9A
    unit_of_measurement: "V"
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    device_class: voltage
    skip_updates: 5

  - platform: modbus_controller
    name: "VM1"
    address: 0x5A
    unit_of_measurement: "V"
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    device_class: voltage
    skip_updates: 5

  - platform: modbus_controller
    name: "V1"
    address: 0x9F #1# meter A phase voltage
    unit_of_measurement: "V"
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    device_class: voltage
    skip_updates: 5

  - platform: modbus_controller
    name: "PWM duty cycle Switch (current)"
    address: 0x97 #PWM duty cycle corresponding to the current set by the rotary switch
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
     - multiply: 0.006
    device_class: current
    skip_updates: 5

  - platform: modbus_controller #Current output PWM duty cycle
    name: "Current output PWM duty cycle"
    address: 0x98
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
     - multiply: 0.006
    device_class: current
    skip_updates: 5

  - platform: modbus_controller
    name: "PWM duty cycle MAX"
    address: 0x6D  #Max Output Current  PWM Duty cycle(*100)
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
     - multiply: 0.006
    device_class: current
    skip_updates: 60


  - platform: modbus_controller #The 1 gear current setting value PWM
    name: "PWM duty cycle 1"
    address: 0x80 
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
     - multiply: 0.006
    device_class: current
    skip_updates: 60

  - platform: modbus_controller #The 2 gear current setting value PWM
    name: "PWM duty cycle 2"
    address: 0x81 
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
     - multiply: 0.006
    device_class: current
    skip_updates: 60

  - platform: modbus_controller #The 3 gear current setting value PWM
    name: "PWM duty cycle 3"
    address: 0x82 
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
      - multiply: 0.006
    device_class: current
    skip_updates: 60

  - platform: modbus_controller #The 4 gear current setting value PWM
    name: "PWM duty cycle 4"
    address: 0x83  
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
      - multiply: 0.006
    device_class: current
    skip_updates: 60

  - platform: modbus_controller #The 5 gear current setting value PWM
    name: "PWM duty cycle 5"
    address: 0x84 
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
      - multiply: 0.006
    device_class: current
    skip_updates: 60

  - platform: modbus_controller #The 6 gear current setting value PWM
    name: "PWM duty cycle 6"
    address: 0x85  
    register_type: holding
    modbus_controller_id: ETEK
    value_type: S_WORD
    filters:
      - multiply: 0.006
    device_class: current
    skip_updates: 60