37 Installation, repair and maintenance services of energy generating and energy supply equipment; construction, installation, repair and maintenance of solar energy production, wind-powered electricity, hydraulic power and geothermal energy systems; construction, installation, repair and maintenance of hydrogen production systems; installation, repair and maintenance of heating and cooling apparatus, heat storage or recovery systems, ventilation, water distribution and air conditioning systems; installation of power generating apparatus; installation of energy-saving apparatus; installation, repair and maintenance of energy production plants and machines; repair or maintenance of power distribution or control machines and apparatus; providing information relating to the repair or maintenance of power generators; installation of environmental protection systems; construction, installation and maintenance of power infrastructures; installation, programming and maintenance of robots intended to control energy consumption; installation, repair and maintenance of energy transmission, distribution and storage pipelines; renovation of buildings; building insulating; information and advice in relation to renovation and insulation of buildings; retrofitting of heating, ventilating and air conditioning installations in buildings; charging of electric vehicles or hydrogen vehicles; recharging of batteries; rental of battery chargers; construction, installation, repair and maintenance of vehicle and battery recharging equipment; installation, repair and maintenance of hydrogen refuelling stations; refueling of vehicles