Canadian Inventor Eden Full's Low-Tech Fix Solves Solar Power's Biggest Problem

I'm not sure its solar powers *biggest* problem, but its certainly an ingenious solution to increase the ability of a solar power to easily and cheaply track the sun.

That solution is the SunSaluter, a low-cost device that makes solar panels track the movement of the sun using little more than three water bottles and gravity. This increases energy output by 40 per cent while producing clean water. As the water-filled bottles drip through a filter, they become lighter which adjusts the panel over the course of the day.