The imputed comparison between hydrogen electrolysis and battery storage is not apples-to-apples: - The hydrogen numbers are from a Fraunhofer (vendor) report

The imputed comparison between hydrogen electrolysis and battery storage is not apples-to-apples: - The hydrogen numbers are from a Fraunhofer (vendor) report. They discuss the cost of the components of the electrolysis system itself. - The battery numbers are from an EPA report. They include the total cost of batteries as a line item ($200/kWh), and go on to add in permitting, construction, grid hookups, land acquisition, etc. Unsurprisingly, a regulatory agency analysis of system cost is more pessimistic than a vendor's analysis of product cost.