A lot of what you are talking about is market related, rather than instrinsic to renewables. And capital costs for solar and wind do help with these issues. It

A lot of what you are talking about is market related, rather than instrinsic to renewables. And capital costs for solar and wind do help with these issues. It could mean that you can afford to generate less and turn off when demand is low. It means that more money is available for battery storage or grid reinforcement. Interconnection could also make a big difference. You can export power from the North Sea to Germany or from Germany to Belgium for example. And ideally the market across Europe would help encourage cross border imports from less carbon intensive sources. Obviously nothing is a 100% solution, but that is why we have a grid and a market.