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Open Sustainable Technology

OpenEMS

Open Source Energy Management System.
https://github.com/openems/openems

Category: Energy Systems
Sub Category: Building Energy Monitoring

Keywords

climatechange electric-vehicle-charging-station energy-management energy-storage hacktoberfest heatpump photovoltaics time-of-use-tariff

Keywords from Contributors

emobility ocpp charger pv eebus semp sunspec wallbox battery solar

Last synced: about 21 hours ago
JSON representation

Repository metadata

OpenEMS - Open Source Energy Management System

README.md

Build Status
Gitpod live-demo
Cite via Zenodo
codecov

OpenEMS - the Open Source Energy Management System - is a modular platform for energy management applications. It was developed around the requirements of monitoring, controlling, and integrating energy storage together with renewable energy sources and complementary devices and services like electric vehicle charging stations, heat-pumps, electrolysers, time-of-use electricity tariffs and more.

If you plan to use OpenEMS for your own projects, please consider joining the OpenEMS Association e.V., a network of universities, hardware manufacturers, software companies as well as commercial and private owners, and get in touch in the OpenEMS Community forum.

OpenEMS in »Local Energy Management«

Local Energy Management

OpenEMS in »Areal Energy Management«

Areal Energy Management

OpenEMS IoT stack

The OpenEMS 'Internet of Things' stack contains three main components:

  • OpenEMS Edge runs on site, communicates with devices and services, collects data and executes control algorithms
  • OpenEMS UI is the real-time user interface for web browsers and smartphones
  • OpenEMS Backend runs on a (cloud) server, connects the decentralized Edge systems and provides aggregation, monitoring and control via internet

Features

The OpenEMS software architecture was designed to leverage some features that are required by a modern and flexible Energy Management System:

  • Fast, PLC-like control of devices
  • Easily extendable due to the use of modern programming languages and modular architecture
  • Reusable, device independent control algorithms due to clear device abstraction
  • Wide range of supported devices and protocols

OpenEMS UI Screenshots

OpenEMS UI Live View
OpenEMS UI History View

System architecture

OpenEMS is generally used in combination with external hardware and software components
(the exception is a simulated development environment - see Getting Started). As a brief overview, this is how OpenEMS is used in production setups:
OpenEMS System Architecture

Getting Started

Documentation

Open Source philosophy

The OpenEMS project is driven by the OpenEMS Association e.V., a network of users, vendors and scientific institutions from all kinds of areas like hardware manufacturers, software companies, grid operators and more. They share the common target of developing a free and open-source platform for energy management, that supports the 100 % energy transition.

We are inviting third parties to use OpenEMS for their own projects and are glad to support them with their first steps. In any case if you are interested in OpenEMS we would be glad to hear from you in the OpenEMS Community forum.

OpenEMS development was started by FENECON GmbH, a German company specialized in manufacturing and project development of energy storage systems. It is the software stack behind FEMS - FENECON Energy Management System and widely used in private, commercial and industrial applications.

OpenEMS is funded by several federal and EU funding projects. If you are a developer and you would like to get hired by one of the partner companies or universities for working on OpenEMS, please send your motivation letter to info@openems.io.

Scientific Research

If you use OpenEMS in your scientific research, please use our Zenodo Digital Object Identifier (DOI) as reference:

Cite via Zenodo

License

  • OpenEMS Edge
  • OpenEMS Backend

Copyright (C) 2016-2025 OpenEMS Association e.V.

This product includes software developed at FENECON GmbH: you can
redistribute it and/or modify it under the terms of the Eclipse Public License version 2.0.

  • OpenEMS UI

Copyright (C) 2016-2025 OpenEMS Association e.V.

This product includes software developed at FENECON GmbH: you can
redistribute it and/or modify it under the terms of the GNU Affero General Public License version 3.

Owner metadata

GitHub Events

Total
Last Year

Committers metadata

Last synced: 12 days ago

Total Commits: 5,925
Total Committers: 116
Avg Commits per committer: 51.078
Development Distribution Score (DDS): 0.503

Commits in past year: 412
Committers in past year: 40
Avg Commits per committer in past year: 10.3
Development Distribution Score (DDS) in past year: 0.51

Name Email Commits
Stefan Feilmeier s****r@f****e 2945
dependabot[bot] 4****] 987
Matthias Roßmann m****n@f****e 541
Wolfgang Gerbl w****l@f****e 208
Fabian Schwarzbeck f****k@f****e 164
Emre Bakir e****r@f****e 151
dependabot-preview[bot] 2****] 91
huseyinsaht h****u@f****e 86
da Kai d****r@g****m 66
Hannes h****7@g****m 64
Pooran Chandrashekaraiah p****c@f****e 54
Max Obermeier t****x@i****m 45
sebastianasen 4****n 37
Sagar Venu s****u@f****e 37
Lukas Rieger 7****r 34
matthias.rossmann m****n@F****e 34
sjjh 2****h 33
Hiromasa Ihara i****a@g****m 26
Thomas Sicking 9****g 25
Felix Stöcker 3****i 21
luzpaz l****z 18
Christian Lehne 5****e 18
KyleMicrocare k****e@m****a 16
dependabot[bot] s****t@d****m 14
Michael Grill 5****l 10
sthhs 1****s 10
DerWahreKlinki 1****i 9
janklostermann j****n 9
Lisa Kaindl l****l@A****E 8
parapluplu f****l@g****m 8
and 86 more...

Committer domains:

Issue and Pull Request metadata

Last synced: 2 days ago

Total issues: 240
Total pull requests: 4,058
Average time to close issues: 11 months
Average time to close pull requests: about 1 month
Total issue authors: 104
Total pull request authors: 151
Average comments per issue: 2.1
Average comments per pull request: 1.22
Merged pull request: 2,175
Bot issues: 6
Bot pull requests: 2,371

Past year issues: 34
Past year pull requests: 355
Past year average time to close issues: 3 months
Past year average time to close pull requests: 25 days
Past year issue authors: 23
Past year pull request authors: 51
Past year average comments per issue: 2.26
Past year average comments per pull request: 1.71
Past year merged pull request: 170
Past year bot issues: 0
Past year bot pull requests: 167

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/openems/openems

Top Issue Authors

  • sfeilmeier (52)
  • ebakir (13)
  • Sn0w3y (8)
  • sjjh (8)
  • MatthiasRossmann (7)
  • benzman81 (7)
  • newman85366-commits (6)
  • ahummelsberger (6)
  • martingruening (6)
  • cf99 (5)
  • dependabot[bot] (3)
  • clehne (3)
  • zoesn89 (3)
  • PlotlyUser2 (3)
  • zoernert (3)

Top Pull Request Authors

  • dependabot[bot] (1,431)
  • dependabot-preview[bot] (940)
  • sfeilmeier (463)
  • Sn0w3y (171)
  • da-Kai (90)
  • fabianfnc (70)
  • miettal (59)
  • DerStoecki (52)
  • lukasrgr (48)
  • sjjh (40)
  • tsicking (39)
  • pooran-c (37)
  • venu-sagar (33)
  • DerWahreKlinki (33)
  • sebastianasen (28)

Top Issue Labels

  • Component: UI (48)
  • Type: Enhancement (42)
  • Component: Edge (23)
  • Priority: Medium (20)
  • Type: Bug (19)
  • Priority: Low (17)
  • Priority: High (16)
  • Stale (15)
  • Component: Backend (11)
  • Discussion Required (11)
  • dependencies (4)
  • good first issue (2)
  • Awaiting Response (2)
  • javascript (2)
  • java (1)
  • hacktoberfest (1)
  • Priority: Critical (1)
  • Type: Maintenance (1)

Top Pull Request Labels

  • dependencies (2,371)
  • javascript (1,415)
  • java (773)
  • Stale (95)
  • Component: UI (23)
  • github_actions (21)
  • Type: Enhancement (12)
  • Component: Edge (9)
  • Type: Bug (6)
  • python (5)
  • security (3)
  • Component: Backend (2)
  • Discussion Required (1)
  • Awaiting Response (1)
  • Priority: Low (1)

Package metadata

proxy.golang.org: github.com/openems/openems

  • Homepage:
  • Documentation: https://pkg.go.dev/github.com/openems/openems#section-documentation
  • Licenses: agpl-3.0
  • Latest release: v1.7.1 (published over 8 years ago)
  • Last Synced: 2026-08-29T21:34:43.687Z (2 days ago)
  • Versions: 3
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent repos count: 1.622%
    • Average: 4.057%
    • Dependent packages count: 6.492%
proxy.golang.org: github.com/OpenEMS/openems

  • Homepage:
  • Documentation: https://pkg.go.dev/github.com/OpenEMS/openems#section-documentation
  • Licenses: agpl-3.0
  • Latest release: v1.7.1 (published over 8 years ago)
  • Last Synced: 2026-08-29T21:35:50.729Z (2 days ago)
  • Versions: 3
  • Dependent Packages: 0
  • Dependent Repositories: 0
  • Rankings:
    • Dependent packages count: 6.999%
    • Average: 8.173%
    • Dependent repos count: 9.346%

Dependencies

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doc/package-lock.json npm
tools/docker/backend/docker-compose.yml docker
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Score: -Infinity