Energy storage manufacturer HiTHIUM has unveiled a 4 MWh sodium-ion battery storage system and said full-scale production and deliveries are planned to begin in 2027.
The ∞Power N4.0MWh system uses HiTHIUM’s ∞Cell N785Ah sodium-ion battery and is designed for a 30-year service life. The company presented the system at its “Powered Day, in Day out” launch event as it moves its sodium-ion technology from development and testing towards commercial deployment.
The N785Ah cell is rated for 20,000 cycles and can support storage durations from two to eight hours. HiTHIUM says the cell has been developed using manufacturing infrastructure compatible with its existing 1,000 Ah lithium-ion production platform, including cell and system integration lines.
At system level, the N4.0MWh uses a stacked-cell architecture and a dedicated battery management system with a stated state-of-charge estimation accuracy of within 2.5%. It is compatible with power conversion systems operating between 800 V and 1,500 V.
HiTHIUM says optimisation of the system architecture reduces the station footprint by 30%, while comprehensive 24-hour efficiency exceeds 88%. A hybrid air- and liquid-cooling system combines AI-based thermal management with meteorological monitoring to adjust cooling requirements. The company estimates this can reduce auxiliary power consumption during operation by 30% and standby consumption by 50%.
Sodium-ion batteries use sodium rather than lithium as the principal charge carrier, potentially reducing exposure to lithium and other battery-material supply constraints. However, the technology remains less established commercially than lithium-ion for large-scale energy storage.
HiTHIUM CTO Dr Nazar Yi said the technology’s development was intended to address cost and resource availability as energy storage deployment expands.
The company plans to initially target utility-scale storage, with further applications envisaged in commercial and industrial facilities, residential systems and energy-access projects.
HiTHIUM has also launched its ∞Edge Pioneer Program to test sodium-ion batteries and storage systems in extreme environmental conditions. The company said it plans to publish progress from the programme over three years and develop further technology packages for harsh operating environments.
