Spanish energy company Audax Renovables SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Audax-Renovables-ES0136463017" target="_blank">BME:ADX</a>) said on Friday it has started construction of a 21.88-MWp solar photovoltaic plant in Navalmoral de la Mata, western Spain, with an investment of EUR 17 million (USD 19.4m).