Running from July 2022 to March 2023, Open Energy Efficiency Savings (OpenEnEffS) was a project adapting and extending the existing US open source CalTRACK methodology for quantifying avoided energy use, using a Metered Energy Savings approach, by combining smart meter data, weather feeds and information on energy efficiency interventions.

The UK energy efficiency industry is held back by the lack of a standardised, open methodology to quantify the impact of energy and carbon saved by specific energy saving measures and interventions. We believe that the implementation of such a standard will open up new business models, providing financial institutions with the confidence to invest based on measurable long-term savings and the opening up additional revenue streams.

Our software was developed to track the impact of retrofit measures over time, drawing in additional data inputs from other Carbon Coop services in order to tackle some perennial issues, such as accurately quantifying comfort take-back and rebound effects and removing non-heating loads (such as electric vehicles) from the core data set. All software developments were fed back into the community and licensed under an open source license.

One of the key outputs from the project has been our PowerShaper Tracker software tool, demonstrating an implementation of CalTRACK using UK weather data to demonstrate a Metered Energy Savings approach to evaluating retrofit and energy efficiency interventions. All our work on OpenEEmeter has been contributed back to the upstream project and internationalisation will be a part of CalTRACK 2.1, the code behind the web-tool is available under an open source license for use and adaptation by others.

A screenshot of the Powershaper Tracker tool, a software tool than can use data to assess the impact of energy efficiency interventions.

The OpenEnEffs project was funded by UK Research and Innovation (UKRI) from July 2022 as part of the SBRI ‘Open Digital Solutions for Net Zero Energy’ competition.