The principal objective of this project is to pioneer the implementation of long-duration energy storage (LDES) technology to address the Department of Defense's (DoD) critical need for reliable innovative energy solutions. The targeted demonstration is at the Army Reserve Center in Maui, with the backup option being the Army Reserve Center in Guam, which will compare the Zinc-Halide LDES battery to conventional lithium-based and other flow battery technologies. By providing a capability to discharge for ten consecutive hours and meeting the military's Unified Facilities Criteria requirements for smaller installations, the technology aims to improve DoD's operational readiness while reducing economic costs. The specific technical objectives will involve validating the technology's financial and performance feasibility under varied conditions such as reduced operations and maintenance (O&M), capturing performance data, preparing for technology transfer, and providing extensive training to identified DoD technicians, engineers, and command personnel and interested local agencies that may be conducting O&M on similar systems throughout and following the demonstration.

This demonstration features a zinc-based, water-electrolyte battery module that stores energy through zinc deposition in individual cells separated by an aqueous electrolyte and bipolar electrodes. Each module is a sealed unit with a polymer casing and no moving parts, intended for intraday applications with discharge durations on the order of 3–12 hours.​

The system uses non-flammable, water-based electrolyte and flame-retardant polymer framing, with operation in a mildly acidic pH range and limited gas release under overcharge conditions. This battery is expected to have a multi-decade service life with relatively low capacity degradation, use of a small number of widely available materials, and recyclability at end of life, positioning it as an option for stationary energy storage where extended energy resilience lifespan and material availability are priorities. 

Identifying alternative LDES solutions, tested in high humidity and acidic environments in the Pacific islands, will further support the DoD's energy resilience goals. Rigorous testing outside a controlled testbed environment will further demonstrate the technology’s readiness level and ability to provide resilient energy, enabling 25 years of mission readiness for the Army Reserve Center in Maui. Another significant expected benefit of this demonstration project will be gaining a greater understanding of battery technologies by providing technology transfer, training exercises, and operational guidance at the end of the project. (Anticipated Project Completion - 2028)