My current portable shower consists of an 11-liter water bag, a manual foot pump, and a spray nozzle. To make it hot, I have ...

In the summer season, solar thermal heaters generate a lot of energy—when you're less likely to be taking a hot shower ... and cold outdoor temperatures make it hard for water to remain hot.

"There is also a giant prize here for consumers who get to stop throwing away their money." Tired of cold showers and high energy bills? An ultra-intelligent water heater could be the solution to your ...