If you double-down on renewables, then you double-down on natural gas. Germany decided to close down their nuclear and coal generation, so the only thing that is left is natural gas for base load (and to augment renewable intermittency problems).
Storage, transmission lines, and over provisioning are also alternatives. Still blows my mind that Germany and other countries are closing nuclear facilities though.
Total production that has been shutdown (baseload power) is around 19,689MW now post fukushima.
They've been able to replace maybe 4MW's with solar at this point? It's kind of mind boggling how much was shut down - the problem this has caused for electrification in germany is significant as now german electric prices are actually very high not low.
Annual contracts for electricity are running 46 cents / kwH which is CRAZY if you want to electrify your country.
France which is right next door, has much more annoying labor laws / high cost of labor is perhaps half that price.