Once upon a time, a solar car seemed like a thing of fiction. But now, such an invention might be closer to reality than many of us had hoped. In late October, auto makers Hyundai and Kia--both subsidiaries of Hyundai Motor Group--announced plans to install "solar roof" charging devices on a number of Hyundai Motor Group vehicles. The Solar Car Roof Project According to CNBC, Hyundai Motor Group plans for