In 2014 the world had around 178 GW (2016 303GW) of installed solar power . Germany is by far the largest country in the world with China/Taiwan and Italy as the next largest ones.
That would give us, with Swedish amount of sun, just about 178TWh of energy every year, That is not much compared to the 18400TWh we use worldwide
There is an astonishing 2 000 000 000 smartphones and they on an average consume 3kWh each. So when you choose to produce the energy for your phone yourself, we add another 3,3% solarenergy, to the world energy system just by taking that small step. Thats a notable differens.