Amsterdam-based renewables developer Photon Energy NV (<a href="https://www.gpw.pl/company-factsheet?isin=NL0010391108" target="_blank">WSE:PEN</a>) on Tuesday said it is expanding in South Africa with the development of a 250-MW concentrated solar photovoltaic (PV) plant with 150 MW/1.8 GWh of long-duration thermal hydro storage.