openhems 0.2.9

A sample Home Energy Managment System based on Home-Assistant

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OpenHEMS

A simple Home Energy Management System

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Presentation

This software is an Open-Source Home Energy Management System based on Home-Assistant installation. It all run locally witch is good for privacy and is customizable. A packaged product, is avalable on https://openhomesystem.com/product/openhems-server/

This software is usefull to get an as smart as possible management of power consumption and production. This should lead to cost reduction.

• If you have a solar panel with battery, it will allow you to have smaller battery (witch is the most expensive part).

• If you have a public power grid source with variable cost, it will allow you to consume when it's lower cost.

Warning : This software is under activ developpment and is used on production but remain at early developpment. All contribution to the software are welcome. Please contact [e-mail] for any questions.

Features

:white_check_mark: Easy installation and UI configuration with HTML pages
:white_check_mark: Support multiple off-peak time-slots and even variable time-slots and cost (RTE Tempo contract).
:white_check_mark: Usefull if you don't have solar panel but only a contract with off-peak.
:white_check_mark: Support solar panel management with EMHASS using AI
:white_check_mark: Support basic solar panel management without AI for no sell or no buy strategy.
:white_check_mark: Home-Assistant widget to schedule devices (washing-machine, charging car... )
:white_check_mark: Time-out for scheduled devices (to force run even if not good to get ready on time).
:white_check_mark: Set the appliance to run automatically until X
:white_check_mark: Set priority handling between multiple appliances
:white_check_mark: Always check maximum capacities to avoid black-out\

We are expected to add soon the following features. We need beta-tester for those features. If you are interested, please contact us.

:x: Variable switch support (like solar router, wall-box)
:x: Works with hybrid and standard inverters\

What OpenHEMS is not.

:warning: It will never guarantee a reaction time due to the performance of the home automation network and OpenHEMS (the worst is WiFi).
:warning: Due to the licence, we do not garentee there is no bugs or problems. For garentee like this please contact us for a comercial support.\

Prerequisites

• Controlable devices:

  • devices witch start on plug like electric-car or old washing machine.

  • connected devices like washing-machine.

• Advantages to delay some consumption. Depending on your electric source (Contract with offpeak hours, solar panels).

• A Linux based server, connected to home network, with a recent Python installation.

• And some software skills...

• More prerequisites, for installation are detailed on installation's documentation.

Install this software

See the documentation

There is a video, in French, to explain how to configure OpenHEMS on Youtube

Configure

See the documentation

usefull documentation

• https://developers.home-assistant.io/docs/development_environment
• https://www.home-assistant.io/installation/linux
• https://emhass.readthedocs.io/en/latest/