The TED 5000 is a home energy monitor that monitors your entire home's electricity consumption. Unlike energy monitors that mount on your home's electrical meter, the TED 5000 uses current transformers (CT) and a measuring unit (MTU) to mount inside of your home's electric panel. Installing the TED 5000 is straight forward but an electrician should be used for those uncomfortable working with electricity.
The Kill-A-Watt EZ is the big brother to the Kill-A-Watt. It has all the features of the Kill-A-Watt but also includes the ability for users to energy their kWh rate so they can see what appliances cost them to operate (without having to do the math themselves). Power cost information is retained by a battery backup.
The PowerCost Monitor (PCM) is a whole home energy monitor that "reads" your electrical meter on the outside of your home.