It’s a cruel irony that the more successful we are at deploying renewable energy the harder it gets to integrate that energy into the grid. Current renewable energy procurement methods match average supply and demand over a 12-month period. This works well when there is only a small amount of renewables but as the share of wind and solar increases this method significantly overestimates carbon savings* and means that organisations following today’s criteria for being ‘100% renewable’ still rely on fossil fuel electricity from the grid many times a day throughout the year. Without sufficient precision, energy consumers lack visibility on the source of their energy and carbon emissions, and there is no incentive for energy storage and flexibility.
* [de Chalendar et al, Stanford University 2019]