services of electricians; installation and repair of electrical appliances; repair of electrical apparatus; installation, maintenance and repair of solar installations for generating power; installation, maintenance and repair of inverters, batteries and electrical connection apparatus for solar energy systems; electrical wiring services; telecommunication wiring services; installation, maintenance and repair of telephone and communication equipment; installation, maintenance and repair of HVAC [heating, ventilation and air conditioning] systems; earthworks [excavation]; installation of building automation equipment; security system installation; construction, maintenance and renovation of property; building and construction services