Hello .convert from amps to watts

Configuration
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I need a way to convert from amps to watts.

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Multiply the current by the voltage to get power.

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I have a version of the below as a sensor template in configuration.yaml. You’ll need a sensor with the current and a sensor with the voltage.

  - sensor:
      - name: "Calculated power"
        unique_id: device_calculated_power
        unit_of_measurement: W
        device_class: power
        state_class: measurement
        state: "{{ (states('sensor.device_current')|float * states('sensor.ac_voltage')|float)|int }}
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I have a similar issue im running modbus over ew11 and i have no sensors that have watts or kwh only have amps and volts dc power off grid with a solar controller and an inverter separate. How would i create something to add as a solar sensor etc to use in HA energy?

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Template helper to multiply voltage by current to get power.

Integral helper to convert power to energy.