Peak Energy and RWE Americas to Pilot Sodium-Ion Battery in MISO Region
Peak Energy has partnered with RWE Americas to pilot a sodium-ion battery energy storage system in eastern Wisconsin, marking the first deployment in the MISO electricity market. The project will test Peak's passively cooled sodium-ion technology, which aims to lower grid-scale energy storage costs and improve reliability amid rising electricity demand. The sodium-ion batteries utilize NFPP cells, allowing safe operation without active cooling and reducing lifetime costs of stored electricity. The MISO region anticipates a need for significant new energy storage capacity.

Peak Energy and RWE Americas are piloting a sodium-ion battery energy storage system in eastern Wisconsin, which will be the first such deployment in the MISO electricity market. The project will evaluate Peak's passively cooled sodium-ion technology at an RWE laboratory facility.
This battery system uses NFPP cells, enabling operation across a wide temperature range without active cooling, thus lowering maintenance needs. The design aims to reduce the lifetime cost of stored electricity by approximately $70/kWh. The MISO region is projected to need substantial new energy storage capacity as electricity demand increases.




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