What a great goal we have: reducing our emissions, and for some of us, saving money at the same time. Energy efficiency is growing more important and getting more attention from all sides. But wouldn’t it all be easier if it were done automatically? The concept called Home Energy (or Power) Management System (HEMS) attempts to achieve this from within our own four walls. But what is HEMS? In a nutshell a HEMS would be a central unit with a graphic interface that controls the energy usage in the different rooms of a house through its sensors.
As a whole, the system is the intricate constellation of different components that can be complex and difficult to build. The components could be energy sources (self-produced energy or bought from the grid); an array of sensors for e.g. temperature, presence of a person, etc; a central control unit along with it’s information terminals; communication unit with the grid, and other smaller secondary components.
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