The current cost of 2000-degree thermal batteries sits between $50-$150/kWh, but here's the kicker: When MIT's thermal battery prototype melted through a steel plate during testing (true story!), they realized containment materials alone could eat 40% of the budget.
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Total Cost Reality: While battery units cost $7,000-$12,000, total installed systems range from $8,500-$17,000 due to installation complexity, electrical upgrades, and supporting equipment.
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For these containerized systems, starting at roughly 100 kWh and extending into the multi-MWh range, fully installed costs often fall in the USD $180–$320 per kWh range.
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The project is valued at 36 million euros and is financed by the German development bank KfW, with additional support from the French Development Agency (AFD).
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