More Good News for Geothermal Energy

Geothermal energy is set for a major expansion because new drilling and reservoir technologies are turning a once-location-limited resource into something far more widely deployable—and the economics are starting to pencil out. For years, geothermal contributed less than 1% of global electricity, largely because high-temperature heat had to be close to the surface to justify the cost of drilling. Over the past decade, faster, cheaper drilling methods and engineered geothermal approaches have widened the map of where geothermal can work.

Enhanced geothermal systems (EGS) are at the center of that shift. Instead of relying on naturally occurring hot water, EGS injects water into artificially cracked rock to create a heat-exchange pathway. Closed-loop systems take a different route: they keep the working fluid in a sealed loop that transfers heat with surrounding rocks, reducing reliance on natural reservoirs. Together, these approaches move geothermal from a niche supply to a scalable industrial process.

The momentum isn’t just about generation. Some companies are also pairing geothermal with storage, aiming to smooth output when demand peaks. Sage Geos Systems, for example, describes a method that pumps water into the ground under high pressure, seals it, and later releases it so surrounding rocks squeeze the water back out. The company reports 70–75% efficiency over a 6- to 18-hour window—lower than lithium-ion batteries, but positioned as far cheaper.

Forecasts from major energy institutions have followed the technology curve. The International Energy Agency previously projected geothermal reaching 3.5% of global electricity by 2050; it has since revised that estimate to 8%. The transcript also flags a long-standing question—whether geothermal can become financially competitive. Consulting firm McKinsey’s analysis suggests costs could fall as deployments standardize. For the United States, McKinsey estimates enhanced geothermal’s levelized cost of electricity could drop toward roughly $54 per megawatt-hour, still likely above solar and wind but closer to their competitive range.

Closed-loop systems are expected to remain more expensive, partly because construction is more involved. Even so, the outlook for capacity is bullish: the analysis predicts U.S. geothermal capacity could grow by more than a factor of 10 by 2050.

Investment signals reinforce the trend. Rested Energy reports nearly $2 billion more invested in geothermal over the past year, with expectations that funding will keep rising. Political support is also framed as unusually broad: geothermal is old enough to be acceptable to conservative energy agendas and carbon-friendly enough to satisfy climate-focused priorities. Germany is cited as a prominent example of government backing, with geothermal positioned as a potential partial substitute for nuclear power. Interest is also noted across Poland, the Czech Republic, Indonesia, China, and the United States.

Overall, geothermal is portrayed as “clean,” relatively low-conflict, and increasingly “boring” in the best sense—less experimental, more industrial—thanks to engineered heat extraction, improved drilling, and storage concepts that could make geothermal a steadier part of the grid.