Wattson Home Electricity Monitor
Wattson is the award-winning way to help you save money and do some good for the environment. With the software provide (holmes), wattson helps you cut energy use and reduce your electricity bill by up to 20%.
Eventually, you can be part of a community of wattson owners who share and compare the data collected about your electricity use. You’ll soon be swapping ideas on how to save even more energy – and money.
Features
- Wattson can save you up to 25% on your electricity bill
- Good for the environment
- Quick and easy to install
- Measures electricity in the whole house
- Can go anywhere in the home
- Only uses up to four watts and cost £4 a year to run
Wattson is portable and wireless, so you can take it anywhere in your home.
The cool, contemporary design looks great whether you live in a palace or a pad.
Wattson shows electricity use in numbers and colours, so you can also use it as a mood light .

Holmes (software included with wattson)
While wattson has the looks, holmes has the brains. Together, they tell you how much electricity you’ve used over the last 28 days, and how much you’ve saved and when. You’ll then be able to send this data to a community, so you and others can share and compare how well you’re doing and swap ideas on how to make even more savings.
Holmes is as straightforward to use as wattson. When set up correctly, holmes talks to wattson whenever the unit is plugged into a spare USB port on your computer. The monitoring unit tells holmes about the amount of energy you’ve used since it was last connected, and stores all this information on your computer.
Holmes doesn't just show energy use in watts – it can tell you how much you’ve spent and when.
Can even show your electricity usage in carbon tonnes.
Stores all your energy use data for days, weeks, months and even years.
Enables you to upload, share and compare your data with others in an online community
Holmes also lets you set a target for electricity use reduction, so you have something positive to work towards.