Building automation is the automatic centralized control of a building's HVAC (heating, ventilation and air conditioning), electrical, lighting, shading, Access Control, Security Systems, and other interrelated systems through a Building Management System (BMS) or Building Automation System (BAS)

Smart building solutions, energy efficiency, building performance, user-centric buildings are some of the forms of building automation.

Basically it is a transition from reactive to proactive maintenance enabling detection of related concerns.

An EV charger is an equipment that supplies regulated and proper rating electrical power for charging plug-in electric vehicles like two wheeler and four wheelers. 

There are two main types of EC chargers: AC charging stations and DC fast chargers. Batteries can only be charged with DC electric power, while most input electricity is delivered from the power grid as AC. 

Charging stations provide connectors that conform to a variety of international standards. DC charging stations are commonly equipped with multiple connectors to be able to charge a wide variety of vehicles that utilize competing standards.

Public charging stations are typically found around the street or at retail shopping centers, government facilities, and other parking areas. Private charging stations are typically found at residences, workplaces, and hotels.

The process of saving energy or controlling the wastage of energy is called energy conservation.

Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy more efficiently (using less energy for a constant service) or by reducing the amount of service used.

Energy can be conserved by reducing wastage and losses, improving efficiency through technological upgrades, and improved operation and maintenance.

Energy can only be transformed from one form to another, such as heat energy to motive power in cars, or kinetic energy of water flow to electricity in hydroelectric power plants. However, machines are required to transform energy from one form to another. The wear and friction of the components of this machine while running cause losses of very high amounts of energy and very high related costs. It is possible to minimize these losses by adopting green engineering practices to improve the life cycle of the components.