A report by the the Natural Resources Defense Council suggests that the Wii U annually consumes less energy than the Wii, as shown in the graph below:
The graph, which is designed to show how much energy your console drains across the year, illustrates that the Wii U is more effective in reducing energy costs annually than the Wii, showing a positive step towards lowering electricity bills in households over the previous generation.
Comparatively, both the PlayStation 4 and the Xbox One more than double in energy consumption from the previous generation, with the Xbox One burning the most into your bills.
The full report, which contains all sorts of interesting facts and figures, can be read here. Are you surprised by the above statistics and the relatively low energy demand of the Wii U?