Hi @petesbradbury! What you’re trying to do should be possible. If you search the forum for “energy”, there are a fair few threads of people describing similar use cases. You might want to check out e.g. Calculate Energy Consumsion manually. Maybe see if any of them provide you some inspiration for how to approach this.
Happy to try and help if you get stuck somewhere. In that case it would be good to know (a) what your raw data looks like, (b) what you’ve tried already - in terms of Influx queries and Grafana charts.