home-assistant-configuration/config/sensors/power.yaml

# - platform: mqtt
#   name: "Washer"
#   state_topic: "zwave2mqtt/washer/50/1/0"
#   device_class: "power"
#   unit_of_measurement: "kWh"

# - platform: mqtt
#   name: "Washer Power 1"
#   state_topic: "zwave2mqtt/washer/49/1/4"
#   device_class: "power"
#   unit_of_measurement: "W"

# - platform: mqtt
#   name: "Washer_Power"
#   state_topic: "zwave2mqtt/washer/50/1/2"
#   device_class: "power"
#   unit_of_measurement: "W"

# - platform: mqtt
#   name: "Washer Power 3"
#   state_topic: "zwave2mqtt/washer/50/1/9"
#   device_class: "power"
#   unit_of_measurement: "W"

# - platform: mqtt
#   name: "Washer Power kwh"
#   state_topic: "zwave2mqtt/washer/50/1/1"
#   device_class: "power"
#   unit_of_measurement: "kWh"


- platform: template
  sensors:
    washer_power:
      friendly_name: "Washer Power"
      entity_id: sensor.time
      unit_of_measurement: ''
      value_template: >-
          {{ states.switch.washer.attributes.current_power_w | int }}
    low_battery:
      friendly_name: 'Low Battery'
      entity_id: sensor.time
      value_template: >
        {%- set threshold = 15 -%}
        {%- set domains = ['light', 'switch', 'sensor', 'zwave', 'lock', 'binary_sensor'] -%}
        {%- for domain in domains -%}
          {%- for item in states[domain] if ((item.attributes.battery_level is defined and item.attributes['battery_level'] | int < threshold) or ("battery" in item.name | lower and ((item.state | int < threshold and item.state|int != 0) or item.state | lower == "low" or item.state | lower == "unknown"))) -%}
            {{ item.attributes.friendly_name }} (
            {%- if item.attributes.battery_level is defined -%}
              {{ item.attributes.battery_level}}
            {%- else -%}
              {{item.state}}
            {%- endif -%}%)
            {%- if not loop.last -%}
              {{', '}}
            {%- endif -%}
          {%- endfor -%}
        {%- endfor -%}