[Class : 37] Installation Of Solar Heating Systems; Installation And Maintenance Of Solar Thermal Installations; Installation, Maintenance And Repair Of Solar Installations For Generating Power, Solar Collectors And Photovoltaic Modules; Installation, Maintenance And Repair Of Boiler Systems And Solar Energy Systems; Installation, Maintenance And Repair Of Inverters, Batteries And Electrical Connection Apparatus For Solar Energy Systems, Advisory Services Relating To Installation Of Power Plants; Building Construction; Repair; Installation Services Including Construction Of Buildings, Roads, Bridges, Dams Or Transmission Lines; Construction And Repair Of Power Plants, Generators And Lines; Installation And Maintenance Of Solar Powered Systems; Maintenance Of Power Distribution Or Control Machines And Apparatus; Excavation Services, Land Reclamation; Installation, Maintenance And Repair Of Energy Conversion Apparatus And Power Plants; Maintenance And Repair Of Electricity Installations; Installation , Maintenance And Service Of Solar Power Plant, Installation And Maintenance Of Solar Water Heater , Architectural Services Architectural Consultation, Energy Auditing Engineering Geological Surveys, Consultancy In The Field Of Energy Saving, Consultancy In The Field Of Power Sector.