Hecate Holdings LLC has hit Repsol SA (<a href="https://www.bolsasymercados.es/bme-exchange/es/Mercados-y-Cotizaciones/Acciones/Mercado-Continuo/Ficha/Repsol-ES0173516115" target="_blank">BME:REP</a>) with a lawsuit to force it to complete the acquisition of the remaining 60% stake in US solar and storage developer Hecate Energy Group LLC, Spanish business daily newspaper El Economista reported on Tuesday.