A meaningless record except from a solar panel sales standpoint.
Like with many business activities - extraordinary minimums or maximums aren't significant to economic feasibility. Annual daily avg. output along with avg. costs of those KWHs - are the only numbers of significance and the ones that will make or break the economic feasibility of solar anywhere. Much of Germany spends large parts of the year under cloud laden skys and days where solar panels contribution to the electrical grid is - little or none. The electrical system that has to fill in these periods - is also part of the overall economics and cost of any part time solar generation system. It will be so until a feasible energy storage system is in place that eliminates the need for a back up to solar.