The Series E round, which brought in a staggering sum for an unconventional grid-storage hardware startup, will carry Form out of its current precommercial state. The company, which produces iron-air batteries, will double its staff headcount from its current level of 326 as it plows through the validation and testing required to sell a warrantied product. Simultaneously, Form is finalizing the location for its first commercial factory, which will begin manufacturing batteries in the U.S. within two years, CEO and co-founder Mateo Jaramillo told Canary Media.