The African Development Bank (AfDB) board on 30 November approved a R3bn ($216m) senior loan for the 100MW Redstone plant at the Humansrus solar park in the Northern Cape, which is being developed by Saudi Arabia’s Acwa Power. The plant will use a molten salt central tower with around 12 hours or 1.2GWh of storage capacity. SolarReserve will supply the core technology for the project, including its ThermaVault molten salt solar thermal system.