Idealab founder Bill Gross started selling solar energy kits in 1973 at 15 years old. Now he’s leading solar tech company Heliogen – CNBC By Expert of Solar Idealab founder Bill Gross started selling solar energy kits in 1973 at 15 years old. Now he’s leading solar tech company Heliogen CNBC Brought to you by Google News. Read the rest of the article here.