A complex path for building heat batteries

The Green Blueprint

In 2022, John O’Donnell and Peter von Behrens figured out how to design a heat battery that would deliver heat at very high, constant temperatures. The breakthrough came on the heels of two years of research and development, some of which took place in Peter’s garage.

Now, John and Peter were ready to prove their technology at commercial scale. So they approached a long-time innovation partner, Calgren Renewable Fuels, about deploying a 2-megawatt-hour heat battery for industrial heat delivery in Calgren’s Pixley, California plant.

That’s when the next wave of problem solving started. It turns out, designing the technology was just half the battle. Manufacturing and installing a commercial scale demonstration proved harder than expected. In October 2023, they started on a six-month construction project that threw a myriad of challenges at the new start-up.

In this episode, Lara Pierpoint talks to John O’Donnell, co-founder and chief innovation officer at Rondo Energy, about the bumpy road of building a first-of-a-kind commercial demonstration. They cover things like the structural engineering challenges of scaling a new technology, and finding the right construction partner. Plus, John explains what new design specs mean for the company going forward.

The Green Blueprint is a co-production of Latitude Media and Trellis Climate. Subscribe on Apple, Spotify, or anywhere you get podcasts. For more reporting on the companies featured in this podcast, subscribe to Latitude Media’s newsletter.