Home | OpenEnergyMonitor
OpenEnergyMonitor
Open source monitoring for understanding energy
Exploring the context of renewable energy and zero carbon

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

OpenEVSE
EV Charging

  • WiFi connectivity
  • Adjustable charge rate
  • Emoncms data logging
  • 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.

Get more information on how to set up an OpenEnergyMonitor system from the Guide.

emonPi
  • 2x CT Sensor inputs
  • 1x VRMS input
  • 1x Pulse input
  • 6 x Temperature
  • Emoncms logging
  • Node-RED & OpenHAB
emonTx
  • 4x CT Sensor inputs
  • 1x VRMS input
  • 1x Pulse input
  • 6 x Temperature
  • Battery option
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 .

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.