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 Thursday that it has signed a long-term power purchase agreement (PPA) with Burger King, committing to supply the fast food restaurant chain with 1,500 GWh of solar energy from its gigantic plant in Spain.