Quaise Energy closes $134M Series B tranche as superhot geothermal moves toward first Oregon plant
Quaise Energy's $134M raise and JERA backing signal superhot geothermal is shifting from drilling claims toward commercial power delivery.
Houston-based Quaise Energy announced on Tuesday (2026-07-07) the first tranche of its Series B financing, a $134 million raise to advance its first superhot geothermal power plant in central Oregon. The company is moving past the announcement phase and into measurable drilling progress, a shift that separates it from next-generation geothermal developers still raising seed capital.5
The raise funds Project Obsidian, a 250 MW superhot geothermal plant in Oregon expected to begin operations in 2030. Idemitsu is considering participating in that project, according to Japan NRG, giving the development a direct line into Japanese capital and Asian power markets.4
The Japanese connection runs deeper than Idemitsu. JERA, the country's largest power generator, invested through its corporate venture capital arm JERA Ventures to support the technology, with both companies exploring deployment in Japan. JERA's interest is practical: Japan sits on significant geothermal resources it has barely tapped, and the country's demand for firm, carbon-free power is rising as it restarts its nuclear fleet slowly and imports LNG at Asian JKM spot prices that settled at $21.41/MMBtu at Friday's (2026-08-14) close.7
The core technology Quaise is commercializing uses millimeter-wave drilling, a gyrotron-based system that melts rock rather than grinding it. The approach enables drilling to depths of up to 20 km, reaching temperatures of 300–500°C, far hotter than conventional geothermal wells. That heat-to-power conversion is the economic argument: superhot rock delivers substantially more energy per well than the conventional hydrothermal resources that underpin America's existing 4 GW of geothermal capacity across 99 plants, over half of which sit in California.4,8
US Department of Energy projections give the sector a large ceiling. Enhanced geothermal projects could provide about 90 GW of carbon-free energy in the United States by 2050, enough to power at least 65 million homes. That forecast remains an estimate rather than a contracted buildout, but it frames the scale that Quaise and its competitors are chasing.3
Two next-generation geothermal developers posted updates in mid-July (2026-07-13) that moved past announcements into measurable progress on drilling, according to OilPrice reporting. That progress is starting to undercut nuclear on cost comparisons, a notable shift given the Trump administration's push for grid reliability and AI-driven demand growth through executive orders and federal funding vehicles.6
Still, the sector faces the same hurdles that have slowed geothermal across the seismically active Ring of Fire for years. Indonesia and the Philippines hold the second and third highest installed geothermal capacity worldwide, but financial and community hurdles continue to slow development there. The lesson translates to Japan, where earthquake risk and local opposition have historically throttled projects despite strong resource potential.1
Japan is responding with public money. NEDO awarded Kyoto Fusioneering ¥500 million to develop a gyrotron to accelerate deep geothermal drilling, a direct acknowledgment that the millimeter-wave approach needs cost reduction before it scales. The award is small relative to the capital Quaise has raised, but it signals that Tokyo sees superhot rock as a strategic option.4
The US reference case is equally instructive. The United States has just about 4 GW of geothermal capacity, a fraction of what the DOE projects for 2050. That gap between current installed capacity and the 90 GW forecast is the commercial opportunity, but also the credibility test: every developer in the space must prove its drilling economics at commercial scale before utilities sign twenty-year power purchase agreements.8,3
Taiwan offers a regional data point on how slowly this moves. Baseload Power Taiwan and CPC Corporation signed an MOU in June (2026-06-18) to accelerate geothermal development across the island, with initial focus on the Tuchang project in Yilan County. That deal remains an agreement to explore, not a construction milestone, and it mirrors the gap between memoranda and megawatts that characterizes the sector broadly.2
Quaise's Oregon drilling campaign must hit its depth and temperature targets to convert investor confidence into utility contracts. The company's technology requires reaching the 20 km range to unlock the economics it has promised, and every kilometre of drilling progress reduces the technical risk that kept institutional capital cautious in earlier rounds. The next milestone is not the next financing. It is the next borehole.4