Spanish utility Iberdrola SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Iberdrola-ES0144580Y14" target="_blank">BME:IBE</a>) said on Wednesday it has signed an agreement to sell a 31-MW mini-hydropower portfolio in Spain to Green Energy Platform (GEP), a renewables investment platform run by Cube Infrastructure Managers.