Practical Instruments, which makes a device that lets solar panels follow the sun, has announced it has raised $8 million dollars in a series A round of funding.
Practical, which grew out of Cal Tech, has designed the Heliotube, a tube that contains solar panels. The trick is that the tube rotates with the sun, so that the panels can generate more electricity. Commercially available silicon solar panels at best can convert about 22 to 20 percent of the light that strikes them into electricity. The theoretical maximum is 29 percent. Different elements can be added to solar panels to … Read more