Whether his department was involved in the installation of solar systems at Vondeling in the Dr Beyers Naudé Local Municipality in the Eastern Cape; if not, why not; if so, what (a) total number of solar systems were installed at Vondeling in 2021, (b) total number of the solar system units are not working, (c) total number have never worked and (d) are the reasons that the contractor has not been required to repair the non-functioning units?