Moonwatt to deploy new class of sodium-ion battery energy storage system specifically developed for hybrid solar plants Moonwatt's modular “ string batteries ” leverage sodium-ion cells housed in a passive-cooled, hermetically sealed and silent battery enclosure. The batteries are DC-coupled to. US-based Peak Energy, a company focused on developing giga-scale energy storage technology for the grid, has announced a significant, multi-year agreement with Jupiter Power, a prominent developer and operator of utility-scale battery energy storage systems. But unlike lithium, a somewhat rare element that is currently mined in only a handful of countries, sodium is cheap and found everywhere. Support CleanTechnica's work through a Substack. As global demand for safe, affordable, and sustainable energy storage continues to surge, SolarEast Energy Storage Integrator introduces a groundbreaking solution — the 60kW/126kWh Liquid-Cooled Sodium-Ion Battery Cabinet. This case study explains why sodium-ion batteries are emerging as an ideal.