DIY Kyoto Wattson Review - DIY Kyoto Wattson Review


It would be quite nice to be able to export this data as CSV to be used in a spreadsheet, but as of yet this feature is not supported. This is apparently coming in a future version, and hopefully after reading this article, along with a Linux version.

As previously mentioned, when plugged into the computer, it will power the device and automatically log the data. However, as the USB port is on the underside of the device, you can’t stand it upright to act as a display, as you would if you were using the power pack instead. This is a pity, as this is where I would happily leave the device 24/7, where I can keep an eye on usage.

”’(centre)Running the kettle all day, every day for a year would clearly get expensive(/centre)”’

The reality of it is that you very rarely want to actually carry the device around. Perhaps you want to see how much power a particular device in your house is using, so you carry it over and do the switch on / switch off test. You soon get over this and end up leaving it in one place. In my situation is was the hallway as I could see it every time I went to the kitchen or left the house. If the device is not turned on, it isn’t collecting data and this will obviously affect your results. This, in combination with the USB connector issue, makes me wonder if the Wattson wouldn’t be all round more suited to having a dock, rather than messy cables.

The Wattson is very quick to react – assuming you have the polling interval set high enough. Obviously the more data being sent, the more accurate your averages are. I can see almost instantaneously, as the central heating kicks in, my power consumption jumps up some 100-150W for instance.


The Wattson is a nicely put together package that is simple to install and a pleasure to use. Its data logging functionality is perhaps more than most people require, but justifies the slightly high price tag of £99.95. You certainly won’t re-coup your costs in money saved, but it looks nifty in your living room and is certainly easier than counting the blips on your meter.

Unlike other sites, we thoroughly test every product we review. We use industry standard tests in order to compare features properly. We’ll always tell you what we find. We never, ever accept money to review a product. Tell us what you think - send your emails to the Editor.