Dutch startup Airturb has developed a 500 W hybrid wind-solar power system featuring a vertical axis wind turbine and a solar base hosting four 30 W solar panels. The system can be used for rooftop or ...

German start-up SunOyster Energy GmbH has developed a concentrating solar technology based on parabolic mirrors that is claimed to achieve a 75% efficiency in converting direct radiation into heat.

Perhaps you’re dreaming of obtaining your home’s electricity without having to rely on that provided by your town or city. If so, you’re hoping to go “off the grid.” And if that’s your dream, you’ve ...