Overview
Terrajoule provides a dispatchable solar energy and storage system for industrial and agricultural customers as an alternative to diesel generators and PV+battery setups. Its DG-S platform uses concentrated solar power with parabolic troughs to generate steam, which drives a Skinner Universal Unaflow steam piston engine connected to an AC generator for on-demand electricity. Thermal energy is stored in large insulated pressurized water tanks, enabling 24/7 operation without relying on lithium batteries. The system targets on-site, off-grid or grid-adjacent installations with multi-million-dollar capital costs; the company was founded in 2009 by Stephen J. Bisset and later restarted after acquiring the original IP, but is noted as out of business around 2019–2021.
Work here?Claim your company
Simplify's Take
What believers are saying
- ECT completed the Terrajoule acquisition on December 24, 2025, unlocking Rice licensing.
- ECT raised A$3.25 million in 2025, funding development and field trials through 2026.
- Management expects 2026 field trials to refine commercialization and support product positioning.
What critics are saying
- PitchBook listed Terrajoule out of business by 2021, signaling a broken operating franchise.
- ECT classified Terrajoule as an asset acquisition, not a business, implying minimal operating substance.
- Missing 2026 commercial soil-remediation contract leaves the 2027 milestone and valuation stranded.
What makes Terrajoule unique
- Terrajoule’s original edge was dispatchable solar using thermal storage, not lithium batteries.
- The 2025 ECT deal repurposed Terrajoule into Rice University’s flash-joule-heating platform.
- Performance-right milestones tie value to 5-kilogram soil remediation and US$2.5 million contracts.
Help us improve and share your feedback! Did you find this helpful?