A 5 MW / 3.6 MWh solar-plus-storage plant is being built with sodium-sulfur batteries provided by Japanese specialist NGK Insulators in Mongolia’s Zavkhan Province. The project developer, Japan-based contractor JGC Holdings, wants to bring the facility online in the spring of next year.
International researchers have analyzed the potential of sodium-based energy storage and found recent technical advances have arrived faster than those for the lithium-ion batteries which have been studied for three decades. Issues remain, however, before sodium constitutes a complementary option to lithium.
Testing lithium-ion, redox flow, and sodium-sulfur technologies, EPC provider CMI Energy wants to establish which types of system, or which combinations, are most suitable for different applications using the 4.2 MWh facility.
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