Plenitude, the renewables arm of Italian oil and gas major Eni SpA (<a href="https://www.borsaitaliana.it/borsa/azioni/scheda/IT0003132476.html?lang=en" target="_blank">BIT:ENI</a>), has wrapped up construction of the 200-MW Guajillo battery energy storage system (BESS) in Webb County, Southwest Texas.