One of the best ways to become more energy efficient is to start measuring the amount of energy you use in your home every day. A company called Current Cost has developed the ENVI energy monitor. The ENVI connects to your electrical energy supply, and gives you detailed data on usage.

The ENVI Energy Monitor comes with a sensor, a transmitter and a display unit. The sensor is attached to a electricity live feed and is connected to the transmitter. The transmitter sends energy usage data to the wireless display unit, which allows you to track energy usage up to 30 meters away from it.

The display unit provides you with many details regarding your electricity usage, such as the cost of the current electricity drain. The display can provide the information in graph form, showing night, day and evening consumption. It can inform you of how this differs to previous consumption and it can also use stored information to forecast daily, weekly and monthly consumption and costs.