This document guides end users on objective evaluation of long-duration energy storage (LDES) technologies. IEEE Std 1679-2020 provides the foundation for the application of this guide. LDES technologies are a class of stationary energy storage that are designed to supply power for an extended timeframe. LDES technologies fall into several categories, including electrochemical (batteries and electrolyzer/fuel cell combinations), mechanical (compressed air and gravity-based, such as pumped storage hydro), thermal (sensible heat, latent heat, and thermochemical), and chemical (hydrogen and ammonia). This guide discusses time-based categories for LDES applications and key metrics for evaluating and comparing technologies. The guide follows the outline of IEEE Std 1679-2020, with tutorial information specific to LDES technologies provided as appropriate. Examples of tutorial information include technology descriptions, operating parameters, failure modes, safety information, architecture, and qualification and application considerations. The guide applies to the characterization and evaluation of batteries with flowing electrolytes that are proposed as LDES technologies. Additional information on these flow batteries can be found in IEEE Std 1679.3. Sizing, installation, maintenance, and testing techniques are beyond the scope of this guide except insofar as they may influence the evaluation of an LDES technology for its intended application.
- Standard Committee
- PE/ESSB - Energy Storage & Stationary Battery Committee
- Status
- Active PAR
- PAR Approval
- 2025-12-10
Working Group Details
- Society
- IEEE Power and Energy Society
- Standard Committee
- PE/ESSB - Energy Storage & Stationary Battery Committee
- Working Group
- LDES WG - Long-Duration Energy Storage
- IEEE Program Manager
- Chinmae Deshmukkh
Contact Chinmae Deshmukkh - Working Group Chair
- Caitlin Planchard
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
No Active Projects
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These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
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