The Rwimi SHP is a run-of-river hydropower project with an installed capacity of 5.5 MW and estimated 27 GWh annual production, located in Kasese district, western Uganda. The Project secured investments of USD 20.8M and USD 3.9M in GET FiT commitments, under the first request for proposals for the GET FiT Premium Payment Mechanism (GFPPM) in Uganda. The Project achieved financial close and commenced construction during July 2015.
The Project includes one of the largest concrete gravity dam structures in the portfolio, at approximately 13 m in height to spillway level, the construction of which had been severely impacted and delayed by unusually high flows during the dry season. Nonetheless, the Developer made good progress during the last 6 months of construction to enable commissioning of the power station and commercial operation during October 2017, following 27 months of construction. The Project is located near to the Hima Cement plant, which is a big offtaker of electricity in the area and will benefit from the improved reliability in electricity supply.
By the end of 2017, the Project had delivered 6.9 GWh to the grid, which reflects the relatively short period of operation. Taking account of grid failures and outages, the cumulative energy output would have been 7.5 GWh. The last two months in 2017 was approximately 101% of the average production estimated at application stage for the same 2 month period, while November was wetter and December dryer than average. The plant availability for the first two full months of operation was approximately 99.4%, which is very high. Grid failures and outages for the same period was approximately 0.4 GWh, which was approximately equivalent to 8% of production.
Figure 4 – Rwimi SHP actual versus estimated energy output.