Episode Details

The energy grid needs reliable, carbon-free power around the clock and geothermal might be the most underestimated solution on the table. A century of oil and gas expertise is now being repurposed to unlock heat sitting beneath our feet almost anywhere on Earth, and in doing so, it's also unlocking a new form of long-duration energy storage that requires no mountain, no reservoir, and no battery chemistry.In this episode, host Alejandro Diego sits down with Cindy Taff, CEO of Sage Geo Systems. Together they explore how Sage is moving beyond the geological constraints of conventional geothermal, what it takes to engineer a reservoir from scratch, how their underground pressure storage system works like an inverted pumped hydro plant, and why companies like Meta and the US Department of Defense are already signing on.You can watch or listen to new episodes every Tuesday and Thursday.Transmission is a Modo Energy production. Your host is Alejandro De Diego - US Market AnalystModo Energy helps the owners, operators, builders, and financiers of battery energy storage understand the market — and make the most out of their assets. Want all the latest power market news? Sign up for our free Weekly Dispatch newsletter:https://bit.ly/TheWeeklyDispatch Chapters:00:00 Next-gen geothermal intro01:49 Cindy Taff background04:51 Geothermal opportunity07:19 Conventional geothermal limits08:39 How geothermal works10:38 Geothermal grid baseload11:44 US heat resource map13:13 Oil and gas drilling tech16:50 Discovering underground storage17:21 Earth Store technology18:07 Storage capacity explained19:35 Fast dispatch no degradation21:42 Pelton turbine explained23:47 Why viable now25:30 Energy storage business model27:12 Target customers28:27 Development obstacles29:52 Permitting process31:36 Meta 150MW deal33:41 5.5 terawatt potential36:17 Grid transformation impact37:49 What drives Cindy39:16 Direct heating use case40:30 Sage 2035 milestones42:20 Energy expansion contrarian view