Air conditioning that's 90 percent more efficient? Pshaw. How about solar air conditioning that powers itself on the sunniest days? That's a lovely concept, and rather sadly LG's solar hybrid air conditioner is not its realization. This PV-toting central unit is said to generate up to 70 watts of power per hour under what we're assuming would be ideally sunny conditions. Meanwhile, residential central AC units suck down more than 2,000 watts when running -- which they would probably be
