Presuming he doesn't lie just doesn't understand what he is talking about -- it's a bold presumption, I know -- he might have latched on total final energy consumption is about 78% fuel and 22% electricity. With current solar tech the latter could be generated on 1/1000 of Earth.
Even if you wrapped the entire planet in a solar panel, you would only be producing 20% of global energy.
One of the biggest mistakes politicians can make is equating the ELECTRICITY with ENERGY!