Unit INA226 10A/1A ESPHome Component

The Unit INA226 10A/1A component reads DC voltage, current, and power data.

1. Component Overview

Item	Information
Product Name	Unit INA226 10A / Unit INA226 1A
SKU	U200 / U200-1A
Main Function	DC voltage, current, and power measurement
Communication Interface	I2C
Default I2C Address	`0x41`
ESPHome Component	`ina226`
ESPHome Version Requirement	`2026.2.2` and later

2. Component Description

Including the Official Component

Official ESPHome Component - ina226

Sensor Configuration

Unit INA226 10A/1A uses the official INA226 sensor to read current, shunt voltage, bus voltage, and power.

sensor:
  - platform: ina226
    address: 0x41
    # 10 A version
    shunt_resistance: 0.005 ohm
    # 1 A version
    # shunt_resistance: 0.08 ohm
    adc_time:
      voltage: 140us
      current: 332us
    adc_averaging: 4
    update_interval: 2s
    current:
      name: "Current"
      accuracy_decimals: 4
    shunt_voltage:
      name: "Shunt_Voltage"
      accuracy_decimals: 5
    bus_voltage:
      name: "Bus_Voltage"
      accuracy_decimals: 4
    power:
      name: "Power"
      accuracy_decimals: 4 

Main parameters:

Parameter	Value	Description
`address`	0x41	I2C address of Unit INA226 10A/1A.
`shunt_resistance`	0.005 ohm / 0.08 ohm	Use 0.005 ohm for 10A and 0.08 ohm for 1A.
`adc_time`	140us / 332us	ADC conversion time; voltage and current can be configured separately.
`update_interval`	2s	Interval for updating measurements in Home Assistant.
`current`	Current	Reports DC current in amperes (A).
`shunt_voltage`	Shunt Voltage	Reports shunt voltage in volts (V).
`bus_voltage`	Bus Voltage	Reports bus voltage in volts (V).
`power`	Power	Reports power in watts (W).

3. Reference Example

yaml 
i2c:
  sda: GPIOXX
  scl: GPIOXX
  scan: true

sensor:
  - platform: ina226
    address: 0x41
    shunt_resistance: 0.005 ohm
    adc_time:
      voltage: 140us
      current: 332us
    adc_averaging: 4
    update_interval: 2s
    current:
      name: "Current"
      accuracy_decimals: 4
    shunt_voltage:
      name: "Shunt_Voltage"
      accuracy_decimals: 5
    bus_voltage:
      name: "Bus_Voltage"
      accuracy_decimals: 4
    power:
      name: "Power"
      accuracy_decimals: 4

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