As of publishing, the average cost per watt is $2.84. Solar panels typically pay for themselves within 5 to 15 years. It all boils down to how much you’re paying for each unit of power ...

Physicists have created the tiniest light-emitting diode (LED) displays ever 1 ... but also ones that are used in advanced solar panels. The perovskite enabled the team’s LEDs to stay bright ...