Sodium‑ion Lowers Grid‑Storage Cost

A passively cooled sodium‑ion battery system is being piloted on the Midcontinent Independent System Operator grid in eastern Wisconsin by Peak Energy and RWE Americas; the company claims it cuts lifetime stored‑energy cost by about $70 per kWh by avoiding active cooling and routine maintenance. This is the first sodium‑ion deployment on that regional grid and, if validated, could enable cheaper, simpler large‑scale storage. — If verified at scale, sodium‑ion systems could reshape storage procurement, reduce integration costs for renewables, and redirect investment away from conventional lithium‑ion supply chains.