Mathieu Carbou mathieucarbou

OpenDTU Zero-Injection: Automatically limit inverters based on grid excess power with Home Assistant and OpenDTU up to a configurable Setpoint

Overview

This HA package allows you to automatically change your inverter production limit to match your home consumption in order to avoid an excessive grid excess.

It also integrates with 3ERL: depending on 3ERL API, the integration will either automaticlaly allow some production excess (when market electricity prices are positive, to make money) or will automaticlally regulate the production limit to avoid any excess when market electricity prices are negative.

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