You mean, "If only Germany could..." but they have not, and will not, reduce their carbon footprint using solar energy by very much. Wind is a much better deal (there's a lot more wind than sun along the northern coast of Germany, in case you've never been there...) but it still cannot scale beyond 20% of electricity supply because there's too much fluctuation. No, the choice for the next 30 years will be to generate 60% of electricity in Germany from coal, natural gas, or fission, while the remaining 40% can be 20% wind+solar and 20% hydroelectric. So if they are going to meet their carbon-reduction targets, they'll have to buy nuclear electricity from France