Abu Dhabi-based renewables company Masdar is holding talks with Spanish utility Endesa SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Endesa-ES0130670112" target="_blank">BME:ELE</a>) to expand its solar photovoltaic portfolio in Spain by more than 400 MW, sources at the Emirati group told news agency EFE.