If you've been driving long enough, this scenario might sound familiar: You get into your car, turn on the ignition, and then... nothing. Your battery is dead, and you're probably going to be late.

"And what do we do when the sun isn't shining?" is one of the most frequently asked questions when discussing electricity generation from renewable energy sources - in this case photovoltaics. The ...

For the most part, it’s simple. Your car or truck has a battery, it supplies electricity to the bits that need it, and that’s all you care about. Until something goes wrong or you want to do something ...