The OpenEnergyMonitor project was founded out of a desire for open-source tools to help us relate to our use of energy, our energy systems and the challenge of sustainable energy.

The next 20 years will see a revolution in our energy systems as we switch away from fossil fuels to a zero carbon energy supply.

By using energy monitoring, modelling and assessment tools we can take an informed approach to working out what are the best energy saving measures to apply. We can then use ongoing monitoring data to ensure solutions meet their expected performance over time.

To explore the OpenEnergyMonitor energy monitoring system see the Guide.

To learn more about our research into zero carbon energy systems see the sustainable energy section of Learn.

All of our work is open source. We believe open source is a better way of doing things where we can learn from and build upon each others work, creating better solutions to the challenges we face.


The Megni / OpenEnergyMonitor shop team: (left to right) Gwil, Glyn, Trystan, Kate, Claire and Amy.

Project founders and maintainers: Trystan Lea and Glyn Hudson.

We would like to give a special thank you to community forum moderators: Robert Wall, Paul Burnell (pb66), Bill Thomson, Jon Murphy, Paul Reed, Eric Wouters (bidouilleur) – for all of their hard work supporting the project and helping out on the forums.


The OpenEnergyMonitor shop is based in Eryri (Snowdonia) North Wales. All our hardware is manufactured and assembled locally. In our spare time we are keen climbers, walkers and mountain bikers.