Independent power producer (IPP) developers are currently generating lower returns on renewable-energy projects at about 11%, making it challenging for banks and institutions to provide finance, said Thebe Investment Corporation power and infrastructure GM Johann Bester. He introduced this problem statement to a panel of experts during the Coal & Energy Transition Industry Day on July 23, adding that some banks are not participating in Bid Window 7 of the Renewable Energy Independent Power Producer Procurement Programme because the returns are simply too low.