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OpenEnergyMonitor
OpenEnergyMonitor
Open source monitoring for understanding energy
Exploring zero carbon energy systems

Energy
Use

  • Monitor electricity, temperature and humidity
  • View historic and real-time data
  • Local and/or remote data logging

Solar
PV

  • Explore solar PV generation
  • Compare consumption
  • Calculate on-site use
  • Optimise demand matching

EV Charging

  • WiFi connected
  • Web app interface
  • Real-time solar PV diversion
  • Variable charge rate
  • Emoncms data logging
  • Advanced safety features
  • Open API

Heat Pump
Monitoring

  • Electricity and heat monitoring
  • Track heat pump performance
  • Remote diagnostics

Introducing the OpenEnergyMonitor system

Pre-assembled open-hardware electricity, temperature and humidity monitoring units
based on the Arduino and Raspberry Pi platforms

emonTx4 (New)

  • 6x CT Sensor inputs
  • 1x VRMS input
  • Pulse input
  • Temperature sensing
  • Higher accuracy

emonPi

  • 2x CT Sensor inputs
  • 1x VRMS input
  • 1x Pulse input
  • 6 x Temperature
  • Emoncms logging
  • Home Assistant

emonTH

  • Internal temperature
  • Internal humidity
  • External temperature
  • Pulse input
  • Long battery life

EmonCMS

  • Web application
  • Data storage
  • Data processing
  • Data visualisation
  • Cloud or self-hosted
All products are available to buy from the
Shop
Get more information on how to set up an OpenEnergyMonitor system from the
Docs

Learn

An in-depth look at the basic principles of electricity monitoring, sustainable energy and more.

Electricity
Monitoring

Learn all about the basics of electricity monitoring, from AC power theory to designing and building your own monitoring system.

Sustainable
Energy

Exploring the context of energy, renewable supply, energy efficiency and zero carbon energy systems.

PV
Diversion

Learn how to build a solar PV diverter to make use of excess energy.