That's on par with the energy use of the entire country of Serbia, more than 19 European countries, and roughly 0.8 percent of total energy demand in the United States, equal to 2.9 million US households. (vox.com)
Seventy - eight percent of total energy demand comes from cities and a huge investment is needed to hit the COP21 climate objectives: $ 53 trillion, according to the UN.» (inc.com)
Of the remaining total energy demand, roughly 60 % is offset by the 5kW solar electric system. (zeroenergy.com)