You will need a level 3 course minimum to be considered and a university is unlikely to consider electrical installation by itself. You may need to do an A-level in maths and physics on top of the electrical installation. Alternatively, you can look at extended national diplomas or A-levels as well. Universities rarely accept students who don't have c's in G.C.S.E as well.
You may want to consider an HNC or an HND which will go well with a level 3 in electrical installation. Plenty of colleges offers HNC/HND as a higher education route and its well-respected qualification for jobs such as wind turbine technician.