Summary
The Department of Energy's Office of Clean Energy Demonstrations awarded five Long-Duration Energy Storage (LDES) Demonstrations Lab Call projects totaling $30 million. The awards span two tracks: early-stage validation of 10+ hour systems and resilience demonstrations of 24+ hour systems at national labs.
The project list includes CMBlu solid flow batteries with Argonne and Idaho National Laboratory, particle-based thermal storage at Sandia, electric thermal energy storage at NREL, a hydrogen-battery hybrid at NREL, and a vanadium flow battery microgrid at PNNL with Invinity. DOE notes that one Topic Area 2 selection is no longer moving forward in negotiations, underscoring the gap between selection and award.
Signals for Investors
- Federal validation dollars are clustering around non-lithium LDES categories (flow batteries, thermal storage, hydrogen hybrid), concentrating performance data and shortening diligence cycles.
- The 24+ hour track is framed as resilience demonstrations, signaling that uptime and operational reliability are now central to DOE-backed validation.
- PNNL's vanadium flow battery project targets a 525 kW system with 24 hours of peak discharge, setting a concrete benchmark for vendors and integrators.
What to Watch Next
Watch for commissioning dates and published performance data from each lab site. Early results on round-trip efficiency, cost of storage, and operating reliability will determine which of these platforms attract follow-on private capital.