Elliott Wood has something you're probably going to want. Like most of us, every month he gets a bill for his monthly energy use. Only his bill… is free. Image: Elliott Wood He's living in a new breed of "zero bills" homes, which comes with solar panels, heat pumps and batteries. Together, that technology generates more electricity than Elliot uses. When combined with the right tariff - in his case a zero bills tariff with Octopus Energy - the excess electricity is sold back to the grid, and