How close is EGS to being cost-competitive?
The most optimistic and quantitative projection comes from a 2025 review in Nature Reviews Clean Technology, which states that enhanced geothermal is expected to achieve a levelized cost of electricity (LCOE) of $80 per megawatt-hour (MWh) and plant capital costs of $4,500 per kilowatt (kW) by 2027 in the USA [2]. To put that in perspective, $80/MWh is competitive with current wholesale electricity prices in many markets, meaning EGS could soon generate power without subsidies. This projection is based on real-world progress: a 2024 field report from Fervo Energy describes successful production testing of the world's first horizontal-well EGS in 2023, followed by significant cost reductions and performance improvements across two commercial projects in Nevada and Utah [3]. However, these are still early-stage commercial projects, not mass deployment.
What is the biggest technical barrier to scaling up?
The fundamental challenge is creating a reliable and reproducible underground heat exchanger. A 2022 review of 41 EGS projects worldwide found that the cumulative installed power generation capacity was only 37.41 MW by the end of 2021, a tiny fraction of what a single large power plant produces [5]. The same review identifies the core problem: because the geological conditions of hot dry rock reservoirs vary so much from site to site, existing stimulation technologies (like hydraulic fracturing) cannot reliably create a fracture network with sufficient volume, heat-exchange area, and stability [5]. This leads to problems like severe fluid loss, short operational lifespans, and induced earthquakes [5]. A 2023 study on key technologies echoes this, noting that unreasonable hydraulic fracture networks at high reservoir temperatures and low heat extraction efficiency are major bottlenecks restricting commercial development [4].
Are there new approaches that could overcome these barriers?
Yes, several promising innovations are being tested. A 2025 numerical simulation study compared different reservoir stimulation strategies and found that a 'caving-enhanced geothermal system' (C-EGS), which breaks the hot rock into suitably-sized blocks rather than relying on a few large fractures, dramatically outperformed traditional fracturing and pipe-based systems [1]. The study showed that fractures inevitably create preferential flow paths that cause rapid cooling (thermal drawdown) and shorten the system's life, whereas a caved reservoir maximizes heat extraction efficiency [1]. The 2022 review also highlights this 'EGS based on caving technology' (EGS-E) as a potential breakthrough that could make reservoir stimulation 'reproducible' and less dependent on site-specific geology [5]. Meanwhile, the 2025 review notes that adapting advanced drilling techniques from the oil and gas industry—such as horizontal drilling, multiwell pads, and multistage stimulation—is already enabling larger scale and lower costs [2]. These converging approaches suggest that the technology is evolving rapidly, even if it is not yet ready for mass rollout.
About These Sources
This answer is built on 5 peer-reviewed studies — published from 2022 to 2025, 3 from 2024 or later, 1 in Q1 journals, collectively cited 107 times — selected as the most relevant from 5 studies that passed quality screening, drawn from 58 papers retrieved from a database of over 500 million.
Sources used in this answer
Caving‐enhanced geothermal system overwhelms fracturing‐ and pipe‐enhanced geothermal system in heat extraction
In a numerical simulation, a 'caving-enhanced geothermal system' (C-EGS) that breaks rock into blocks outperformed traditional fracturing and pipe-based systems by avoiding preferential flow paths that cause rapid cooling and shortened lifespan.
Enhanced geothermal systems for clean firm energy generation
A 2025 review projects that enhanced geothermal systems in the USA will achieve a levelized cost of electricity of $80/MWh and capital costs of $4,500/kW by 2027, becoming competitive with market electricity prices.
Deployment of Enhanced Geothermal System technology leads to rapid cost reductions and performance improvements
A 2024 field report from Fervo Energy describes successful production testing of the world's first horizontal-well EGS in 2023, with subsequent cost reductions and performance improvements across two commercial projects in Nevada and Utah.
Research status and development trend of key technologies for enhanced geothermal systems
A 2023 review identifies key bottlenecks for EGS commercialization: unreasonable hydraulic fracture networks at high temperatures, unclear multi-scale coupling, low heat extraction efficiency from flashing flow, and low thermoelectric conversion efficiency.
Challenges and opportunities of enhanced geothermal systems: A review
A 2022 review of 41 EGS projects worldwide found cumulative installed power generation capacity of only 37.41 MW by 2021, and identifies the lack of a reproducible reservoir stimulation model—due to variable geology—as the fundamental barrier to commercialization.