Sodium (Na)-based battery technologies with low cost (from using earth-abundant Na) and prolonged cycle life are gaining much attention for large-scale energy storage applications. Among the widely studied Na-based systems, intermediate-temperature Na-metal halide (IT Na-MH) batteries have demonstrated several advantages over conventional Na-S batteries, including superior battery safety, higher open-circuit voltage, lower operating temperature, and ease of assembly. In here, we will present and summarize technical challenges and opportunities associated with IT Na-MH battery technologies for large-scale energy storage applications.