Mathieu Carbou mathieucarbou

Automatically limit inverter outputs based on grid excess with Home Assistant and OpenDTU

Here is my Home Assistant OpenDTU dsashboard:

I sometimes need to be able to limit by production excess around a number to avoid retruning too much energy to the grid.

So I did a Home Assistant automation that is looking at the grid_power sensor to automatically adjutst the inverters' limit in order to keep the returned powr at a specifed amount.

Home Assistant Solar Diverter (Router)

An alternative to use Home Assistant instead of a Shelly EM Pro for the Shelly Router.

Refs:

Shelly Solar Diverter (Router)

https://yasolr.carbou.me/blog/2024-07-01_shelly_solar_diverter

Based on this blogpost.

To sign Git commits, you need a gpg key. GPG stands for GNU Privacy Guard and is the de facto implementation of the OpenPGP message format. PGP stands for ‘Pretty Good Privacy’ and is a standard to sign and encrypt messages.

Setting up

Install with Homebrew:

$ brew install gpg

ESPHome with Dallas Temperature Sensor

Device Website

Home Assistant Integration

Home Assistant H&T (Hygrostat & Thermostat)

Hygrostat

View code:

type: humidifier
entity: humidifier.hygrostat_chambre_rdc
name: Chambre

Tempo colored icons with RTE

Edit view:

Code:

Home Assistant: % autoconsommation temps réel

sensor.inverters_energy: production solaire totale en kWh
sensor.grid_energy_returned: mon Shelly EM qu mesure l'injection en kWh

template:
  # https://www.home-assistant.io/integrations/sensor/
  - sensor:

	# https://www.home-assistant.io/integrations/template
	template:
	- trigger:
	- platform: homeassistant
	event: start
	- platform: time_pattern
	minutes: /30
	action:
	service: weather.get_forecasts
	data:

	The MIT License (MIT)
	---------------------

	Copyright © 2023-2024, Mathieu Carbou

	Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT O