Paths to the Long Duration Storage Earthshot

The DOE Energy Storage Grand Challenge launched Storage Innovation 2030 (SI 2030) at the September ESGC Summit. The objective of SI 2030 is to develop specific and quantifiable RD&D pathways to achieving the targets identified in the Long Duration Storage Energy Earthshot, which seeks to achieve 90% cost reductions for technologies that can provide 10 hours or longer duration of energy storage within the coming decade.

DOE has or currently supports over 30 distinct energy storage technologies, including specific methods of storage via electrochemical, electromechanical, thermal, flexible generation, and controllable loads, as well as power electronics. Many of these energy storage technologies have the potential to enable the Long Duration Storage Shot targets. Achieving these aggressive targets will require resolution of key barriers throughout value chain, from basic and applied research through analysis, demonstration, manufacturing, and full integration into the power and end-use sectors. 

Through Storage Innovations 2030, DOE is seeking to understand the specific innovations required to unlock the potential for long duration applications in a variety of these technologies. To obtain community input, SI2030 is launching three components: the SI 2030 Prize, SI 2030 Flight Paths, and the SI 2030 Framework.

SI 2030: Prize 

The SI 2030 Prize is an opportunity for storage teams to propose transformative, emerging technology ideas for grid-scale energy storage solutions. This prize aims to gain insight on emerging energy storage technologies to incentivize creativity and innovation that expand beyond the current state-of-the-art.

Register your team or sign up for updates here.

SI 2030: Flight Paths

SI 2030 Flight Paths is an opportunity for the storage community to identify which R&D innovations and opportunities are best suited for collaboration and partnerships.

The primary objective of Flight Paths is to identify key RD&D barriers in each specific long duration storage technology, and the opportunities for collaborative, pre-competitive activities. Of the 30+ storage technology areas identified in the ESGC Roadmap, 8-10 promising long duration technologies will be identified for detailed analysis through a public-facing pitch session process.

On November 2 and 3, DOE held virtual pitch sessions where speakers had the opportunity to describe why their technology is a promising solution for a resilient, decarbonized future and why it should be included in the Partnerships Roadmap portion of SI 2030. 

SI 2030: Framework

The third component of SI 2030 is an industry-focused Framework, which aims to quantify the impact of DOE RD&D activities on future storage cost targets. An analysis of 10 technologies will be performed:

  • Li-ion Batteries
  • Lead-acid Batteries
  • Supercapacitors
  • Flow Batteries
  • Pumped Storage Hydropower (PSH)
  • Compressed-Air Energy Storage (CAES)
  • Zinc Batteries
  • Sodium-ion Batteries
  • Thermal Energy Storage
  • Hydrogen Energy Storage

There may be opportunities to engage with the technical framework team if you are an expert in one or more of these technology areas. If you would like to share input around the future of one or more of these technology areas, please email for more information.
Results from this framework analysis will be shared in a 2023 Office of Electricity report.