Plugwise Energy Monitoring and Saving
Plugwise Energy Monitoring And Saving
Find out about the Plugwise system for energy monitoring and control of individual appliances
energy efficiency | shopping | carbonIn our article
Bwired Energy Usage and Home Automation we looked at a home in the Netherlands which uses the
Plugwise system to track electricity usage and control individual appliances. In this article we will look in more detail at Plugwise.
Plugwise
Plugwise is a system which enables the electricity usage of individual appliances to be monitored in real time wirelessly. While a basic
plug-in power monitor enables the
electricity consumption of an appliance to be monitored, and devices such as
Owl and
Efergy enable whole house (or office) consumption to be tracked wirelessly,
Plugwise goes one stop further.
The Plugwise system is made up of three components pictured above and described below:
Circle - a plug which goes between the plug of an appliance and the mains power socket.
Stick - a USB device which is plugged into a personal computer and receives data wirelessly from the
Circle(s). This
Stick can also transmit instructions wirelessly to
Circles to turn appliances on or off.
Circle+ - a
Circle which contains a real-time clock and battery.
Circle+ is used to co-ordinate the
Circles within the network. This also acts as a regular
Circle as described above.
Source - software which is installed on the computer to process the collected electricity consumption data in realtime, display it numerically and in charts, and log it for later analysis. The
Source software is also used to manually or automatically turn appliances on or off.
Plugwise
Circles communicate with one another and with the
Stick via the
ZigBee wireless communication protocol. This protocol (not to be confused with
Bluetooth) is designed for applications where
low data transmission rates are acceptable,
long battery life is essential, and
secure networking is required. (Click here to view the
ZigBee article in
Wikipedia for more information).
The
Circles form a
mesh network between themselves and the
Stick. As the transmission range of ZigBee is limited, tranmissions from
Circles distant from the
Stick are sent by the shortest available route via other
Circles located nearer to the
Stick.
Each
Circle has a unique ID code. Using the
Source software you simply enter the name of the appliance plugged into each
Circle having noted the ID codes, and you can start tracking
electricity consumption immediately.
The Benefits of Plugwise
Plugwise is primarily designed as an
energy saving product. By being made aware of where electricity is used in the home and office, it is possible to identify ways to reduce consumption. With average consumpion of 3500 to 5000 kWh (units) of electricity per year for the average European household, Plugwise predict huge savings of 500-600 kWh are possible.
Since Plugwise can be used to turn appliances on and off (as well as measuring their electricity consumption), it opens up the unique possibility of
Peak Shaving. At present when there is a surge in demand for electricity, suppliers struggle to meet it. In California for example, this has already led to serious power
blackouts.
Peak Shaving reduces peak demand by automatically switching off certain (non-critical) appliances in homes and offices when demand for electricity is about to exceed supply. Consumers who sign up to peak shaving programmes can expect
reduced tariffs.
For those on
electricity tariffs with different pricing at different times of the day, the Plugwise
Source software can be set up to
schedule tasks to benefit from the lowest rates - e.g. starting the dishwasher at night. This reduces the
cost of electricity for the consumer, and again reduces
peak demand for the utility company so that less new power stations will need to be built.
New Plugwise Products
By the end of 2008 additional
Plugwise components will be added. These include
Switch - a battery powered
wireless double switch which can be programmed (using
Source software) to control multiple lamps and appliances at the same time, and
Socket - a built in version of the
Circle which will measure the consumption of fitted lighting circuits etc.
The next version of the
Source software (scheduled for end 2008) will allow
bi-directional measuring. This will enable
renewable energy generation (
wind and
solar for example) to be tracked in the same way that energy consumption is already being measured.
Buying Plugwise
Plugwise is currently only available with a Euro-style (two-pin) plug. At the start of 2009 a UK-style (3-pin) version will go on sale, but until then Plugwise
Circles can be used with
travel adapters (
two per
Circle!) here in the UK. The
Source software is already produced in English, and the
Getting Started Guide and full
Plugwise Manual will be available in English also at the start of 2009.
The standard
Home Basic Pack includes one
Circle+, eight
Circles,
Stick, and
Source software for around
€360. This can be coupled with the
Home Extension Pack, available for around
€360 which contains ten
Circles to extend your Plugwise network. A
Home Start Packet is also available for around
€125 which has just one
Circle+,
Stick, and
Source to get your started.
When you consider the price of a standard plug-in mains
power meter (£10-30), and the additional functionality of the Plugwise
Circles, they are great value for money at around £20 each.
For commerical buyers, flexible
Plugwise packages are available
for use within offices and large buildings under the name
Pro Basic with up to 60
Circles per network, multiple interconnected networks possible, more advanced software, internet access of collected data in realtime, and much more.
More Plugwise Information
Click here to visit the official
Plugwise Website (in Dutch). An English language version of the website is available
here, but currently there is more information and images of the Plugwise system on the original Dutch site. There are three
Plugwise videos available to view here which are in Dutch, but give a good feel of what Plugwise can achieve.
Article Last Modified: 15:20, 8th Sep 2008
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