In this kind of debates people often forget how far north Sweden just happens to be. Solar farms has their average production output down to single digit percent during the worst months. At the same time, those months also see an increase to around double consumption of electricity demand compared to the warmest months. Solar production has a negative correlation to electricity demand in Sweden.

Wind has a slight positive correlation to demand, but the storage requirement for wind can be calculated as weeks/months compared to hours for solar.

Sweden also has a free market for electricity without any price roofs. That mean prices can be zero for long periods during the summer when solar is overproducing, but it can also reach over €1 per kw/h during periods of supply shortage. Have the record price for 5 days and have the remaining 360 days free of charge, and you would still end up paying more than if you paid the average cost for a full year (to be fair, in the cheapest of the 4 energy regions).

To add some more aspect for the Swedish energy grid, currently the south of Sweden that is connected to the Danish and German grid are suffering from significant supply shortage. The main power plant to address this is an old Oil power plant that was supposed to exist only as reserve energy, but have since a few years now been running every day throughout the year.

There is construction of more new thermal power plants. The two main strategy to solve the shortage, split along the two political lines, is either nuclear or to combine wind power with power plants burning bio fuel and then carbon capture the emissions (both being technologies with absolutely zero controversies). The later is what is being constructed right now, while nuclear might see construction in the future.