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Geothermal Thermoelectric Generator (GTEG)
We have developed an innovative geothermal thermoelectric generation system (GTEG) capable of delivering continuous and autonomous power in extreme volcanic environments. The technology has been successfully validated in the Antarctic, where a first prototype operated uninterruptedly for a full year —including the polar winter— producing 36 kWh/year, followed by the deployment of two improved units at Cerro Caliente and Monte Pond during the 2025 polar campaign. In parallel, the system has been scaled up in Lanzarote (Timanfaya National Park), where three passive thermoelectric generators currently provide a stable net output of 400 W continuously, generating 3.5 MWh/year. These results demonstrate the robustness, scalability and field-readiness of this patented solution for powering remote volcanic monitoring stations.
Active volcanoes pose a major threat worldwide, yet most remain poorly monitored due to logistical and technical challenges, especially the lack of reliable, autonomous power in remote or harsh environments. The GTEG system directly solves this problem by providing continuous, maintenance-free, and scalable electricity to volcanic monitoring stations. Proven in Antarctica and Lanzarote, it reliably powers sensors, geodesy equipment, and real-time data transmission. Its modular “plug-in” design allows tailored installations for different energy demands, offering a competitive, robust alternative to solar or battery systems and enabling uninterrupted volcanic surveillance for improved early warning and risk mitigation.
