# OpenEMS/openems

OpenEMS - Open Source Energy Management System

Repository: https://github.com/OpenEMS/openems
Canonical: https://ross.abutalabs.com/products/openems
Language: Java
License: AGPL-3.0
License Family: copyleft
Topics: climatechange, energy-management, photovoltaics, energy-storage, electric-vehicle-charging-station, heatpump, time-of-use-tariff, hacktoberfest
Last push: 2026-08-26T15:56:56+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 95, longevity 100
- inputs: {"age_days": 3608, "days_push": 7, "days_rel": 32, "gap_med": 30.0, "n_releases_24m": 23}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1530, forks 669 (observed 2026-08-28T04:04:59.242987+00:00)

## What it is
OpenEMS is an open-source, modular Energy Management System for monitoring and controlling energy storage, photovoltaics, EV chargers, heat pumps, and related devices. It consists of an on-site Edge runtime, a web/mobile UI, and a cloud Backend for aggregation and remote control.

## Use cases
- manage home solar battery storage and PV self-consumption
- control EV charging based on solar surplus
- optimize energy use with time-of-use electricity tariffs
- integrate heat pumps and electrolysers into energy management
- monitor and control multiple sites from a central backend
- build PLC-like fast control algorithms for energy devices

## When to choose
- you need an open, modular platform to integrate heterogeneous energy hardware
- you want local edge control plus central cloud aggregation
- you need device-independent, reusable control algorithms

## When to avoid
- you need a turnkey consumer app without setup effort
- your project is outside energy/IoT domains
- you cannot work with Java/OSGi-based systems

## Facets
- artifact type: application
- maturity: active
- function: monitoring, iot, workflow-automation, analytics
- domain: iot, energy, self-hosted
- platform: jvm, cross-platform, self-hosted
- tags: energy-management, photovoltaics, battery-storage, ev-charging, heat-pump, smart-grid, time-of-use-tariff, automation, web-server

## Member repositories
- OpenEMS/openems (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:59.242987+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:31:23.718452+00:00, confidence not recorded.
  - readme: https://github.com/OpenEMS/openems (fetched 2026-08-28T04:04:59.242987+00:00, sha 1a6da8b5f5ff)
- Data as of 2026-08-30T08:39:29.467469+00:00.