Poland passed a law which required that wind turbines be set back, ten times the height, from buildings or forests. This is for land based and offshore turbines.
They also enacted a law which can significantly increase taxes on renewable power.
For Solar I found that.
Polish grid operator Polskie Sieci Elektroenergetyczne (PSE) says the country reached 2,261.3 MW of installed solar capacity at the end of July.
https://www.pv-magazine.com/2020/08/10/polands-pv-capacity-reaches-2-26-gw/and
Poland to tender 3.2 GW of solar by end of next year
https://www.pv-magazine.com/2020/08/24/poland-to-tender-3-2-gw-of-solar-by-end-of-next-year/Poland is heavily invested in Coal and so doesn't have a strong gas infrastructure. Even if they did decide to go to gas for their fast reacting power needs, in a renewable world, then they would build a dependency on Russian gas. Something which, as you can imagine, is not highly popular in Poland. Right now they are 75% self sufficient with electricity due to their in country coal mining. With Wind, Solar and gas fired power, they could find themselves constantly less than 50% self sufficient.
Putting in a floor of Nuclear would give Poland a solid base for their power structure, consistent for 40 to 60 years. Yes it has environmental issues with recycling etc, but it solves a big problem for them.
The UK has 24GW of installed wind, both onshore and offshore. The UK suffers significant periods where our installed 24GW only delivers under 1GW of power. It has _never_ delivered more than 16GW of power for the 24GW installed and that was during a series of storms.
UK generating output tends to max at around 42GW. With 24GW of nameplate wind, 13gw of nameplate solar and 10GW of nameplate Nuclear. The UK gas (CCGT), generation is rarely less than 10GW and regularly over 15GW. When wind and solar are low, CCGT is often at or over 20GW.
This variance is a really big problem for any country. Poland is a northern latitude country which means solar is less efficient than for most of Europe. I would expect solar farms to be mainly in the south of the country, rather than on the Baltic sea given that the lowest point of Poland is around 49deg latitude and 40deg latitude is considered good, decreasing after that.
Just talking about how Wind will solve their problems, given the economic and social structure of Poland doesn't cut it. Actually understanding how a northern latitude country solves its carbon emitting power problems requires a lot more understanding.
If you want to make your case you have to explain why, when the UK has 37GW of installed solar and wind, out of 42GW total daily generating output, why the vast majority of power generated, all year, is Nuclear and CCGT?
Which leads us onto analysis which claims:
UK needs 100GW more solar & wind to hit 2050 target
https://www.pv-tech.org/news/report-uk-needs-100gw-more-solar-wind-by-2050-to-hit-net-zero-targetAccording to the document, the UK needs to swell its wind and solar capacity four-fold to 140GW in 2050 from 33GW today in order to meet the climate goal set by outgoing Prime Minister Theresa May in June. 30GW of new nuclear and 3GW of carbon capture storage will also be required.
As you can see, the document is using slightly out of date figures. The UK is already at 37GW of solar and wind installed capacity. But it is hard to knock these figures when 37GW of installed capacity produces less than half of the 42GW daily max output. That is MAX, half the daily output. there are times when it is less than 10%. Look at that peak in late Jan 2019.
Note the document talks about 30GW of Nuclear, that is to replace the CCGT when renewables are low. I would have said that 15GW would probably do it, but 20GW would provide a buffer. But that's my uninformed thinking.
When talking about renewables, what they do for a country and whether or not it is worthwhile to build a nuclear capacity, it is worthwhile looking at what actually happens, on a daily basis, with large installed renewable installations (the UK is large based on the total use).