Business Green: For many companies looking to install solar panels, an inconveniently placed tree or rooftop facing in the wrong direction can soon put paid to their green ambitions by casting a shadow over the best spot for their solar array. But now US-based electronics component manufacturer National Semiconductor is hoping to address the problem with the launch of a new product that promises to reduce the effect of shade on photovoltaic solar panels. The device, called SolarMagic, will be …