APsystems

The APsystems integrationIntegrations connect and integrate Home Assistant with your devices, services, and more. [Learn more] allows you to read the data from your APsystems EZ1 microinverter. It also allows you to set the output limit to anything above 30 watts.

Sensors

Numerical sensors

Sensor ID Unit Description
total_power W Total current output of the inverter
lifetime_production_p1 kWh Lifetime production of first input
lifetime_production_p2 kWh Lifetime production of second input
lifetime_production kWh Lifetime production of both inputs combined
total_power_p1 W Current input on first input
total_power_p2 W Current input on second input
today_production kWh Today’s production of both inputs combined
today_production_p1 kWh Today’s production of first input
today_production_p2 kWh Today’s production of second input

Binary sensors

Sensor ID Description
off_grid_status On when the inverter is not connected to the power grid
dc_1_short_circuit_error_status Short circuit detected on first input
dc_2_short_circuit_error_status Short circuit detected on second input
output_fault_status Output because of any error deactivated

Settings

Setting ID Type Description
inverter_status switch Enables or disables the inverter’s output
output_limit number Sets the max output of the inverter

Flash Endurance

There has been a discussion about the inverter’s lifetime being shortened when using the output_limit setting excessively. APsystems officially confirmed this to me while also acknowledging that newer hardware versions don’t have this issue, while older ones should be updated at most every 300 seconds. Newer inverters have a serial number starting with Ex701 and thus aren’t at risk of flash wear when setting the output_limit more frequently than every 300 seconds.

Prerequisites

Make sure the local API is activated and set to Continuously. For that, connect to the inverter via Bluetooth using the app and go to Settings > Local Mode, set the switch Enable Local Mode to on and make sure to set this to Continuously.

Configuration

To add the APsystems device to your Home Assistant instance, use this My button:

Manual configuration steps

If the above My button doesn’t work, you can also perform the following steps manually:

  • Browse to your Home Assistant instance.

  • Go to Settings > Devices & Services.

  • In the bottom right corner, select the Add Integration button.

  • From the list, select APsystems.

  • Follow the instructions on screen to complete the setup.