A quick calculation shows to supply all of Denmark's energy needs with solar, (assuming sufficient storage), they would need about 1,000 km² of solar panels. That's about 2% of their land area. That assumes a solar irradiation rate of 0.5 kWh / m² which is about what they get in winter. They get 6 kWh / m² in summer, so there would be 10 fold over production then. If they stored that by converting it to hydrogen, even if done very inefficiently, it would more than halve the land area required.

Given their solar irradiation is so poor they would be better off with wind. While 2% is big, it isn't inconceivable, particularly as solar panels don't prevent the land from being used for other things, such as transport, buildings, even some forms of agriculture. People will get comfortable with it over time, just as they did with destroying most natural ecosystems in Europe to turn the land over to agriculture. That horrifies me far more than covering 2% of land with solar panels.