Look at the date on the article you linked. It was published on July 7th.
When solar panels are seeing 15 hours of high-angle summer daylight and clear skies, generation should be considerably overcapacity.
Come back to me when you can write that same overcapacity article in November, when your panels are struggling with 9-hours of low-angle overcast.
When you have sufficient solar capacity to meet winter demand, you'll have 200% - 400% of demand in summer. That is simply the nature of solar production outside of the tropics.