Eaton (ETN) said Wednesday it completed a $100 million expansion at its Nacogdoches, Texas, facility, more than doubling its US production capacity for voltage regulators and three-phase transformers.

The company said the added 200,000 square feet will support rising demand for equipment needed in power grid modernization.

Production has started at the expanded site, with Texas utility Oncor receiving the first shipment, Eaton said.