The EU has the following target in place for the sharing of electricity:
The EU has set an interconnection target of at least 15% by 2030 to encourage EU countries to interconnect their installed electricity production capacity. This means that each country should have in place electricity cables that allow at least 15% of the electricity produced on its territory to be transported across its borders to neighbouring countries.
The main reasons to do this is that it is good for renewables and it is good for overall resilience. The UK, for example, has one of the largest offshore wind markets in the world. But if it’s having a bad wind year, interconnections allow it to import the electricity it may need — perhaps from Norway, which is Europe’s biggest producer of hydropower.
Here is what that looked like in 2021 (via the FT):
Of course, this works really well when there’s enough electricity to go around and everyone is cooperating. The question this winter is whether that changes at all.
BRANDON DONNELLY 
Last week, on the radio, I heard a commentator say this: “If we were to switch over to renewables exclusively (solar, wind, biomass…), we could meet the world’s energy needs for a minute and a half”. If this statement is true, we should not rush to abandon fossil fuels just yet. Being from Alberta, I will predictably pound the table for oil. Think you can live without oil? Think again. Take a typical Tesla, for example: each tire requires several gallons of oil to produce. The interiors of these cars (and all others) are largely composed of weight saving polymers, also the byproduct of oil refinement. Rather than accelerating our demise by making due with less, we should make peace with a resource that is beneficial in so many other ways.
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I hate to be that guy pointing out that neither the UK (since Brexit) nor Norway (since forever) are part of the EU.
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Yup – there are still interconnectors in place though
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