Sure. Solar works alright. That 4 kw a year in the largest solar panel in Germany, equivalent to a train running it's motor, is REALLY efficient.
My understanding is that there's this claim that if we just invest and scale it up, that it will automatically go from providing .4% of the world's electricity to not only surpass the 6.5% of nuclear, but also surpass that into 80%, or even somehow, magically, 100%.
(By the way, that .4% may not include hydroelectric, but it also includes geothermal, which can only be built in certain areas)
I'm sorry, but just claiming it won't make it so. But if you hope hard enough, maybe it will work.