That is an interesting thought exercise. Would they really be cut off, and what would the impacts look like? I don't know anything about Kaliningrad internal sustainability, but could guess it's... not good. Time to annex?

If they can't generate their own, I'd guess they'd have to buy it from a neighbour. The agreement isn't a total lack of trade, but withdrawing from Russia having control over their grids.

Of course that means they'd have to behave in Kalingrad, else they'd see power cut off. Personally I thing Moscow has the resources to build a power plant in Kalingrad if they haven't already.

I don't think Russia's economy lives off of some electricity it has been selling to the baltics

Down with ruSSian imperialism and fascism!

Pretty big legacy system to overhaul.

Power grids are very interlinked, it helps with grid stability. It would be weird if they weren't.

This is a fun map: app.electricitymaps.com

https://en.m.wikipedia.org/wiki/The_Shock_Doctrine

Klein argues that neoliberal free market policies (as advocated by the economist Milton Friedman) have risen to prominence in countries and regions such as the United States, the United Kingdom, China, the European Union, and Eastern Europe, because of a deliberate strategy of "shock therapy". This centers on the exploitation of national crises (disasters or upheavals) to establish controversial and questionable policies, while citizens are too distracted (emotionally and physically) to engage and develop an adequate response and resist effectively. The book advances the idea that several man-made events, such as the Iraq War, were undertaken with the intention of pushing through unpopular free market capitalist policies in their wake.

The Eastern Bloc suffered an enormous drop in living quality following the dissolution of the USSR. Far from reaping a bounty via free market liberty, the people in these countries found themselves the subject of a historic privatization and looting of national treasuries and resources.

Bulgaria is an interesting data point. It's economy collapsed during the '90, and was rapidly privatized in the '00s after the son of Tsar Boris III of Bulgaria (deposed in 1946) was installed as the state's Prime Minister.

Corruption under the former aristocrat soared, access to education and housing was stripped away, and the country's most productive assets were sold off piecemeal to private investors.

By the mid-10s, the country was wracked with the same street protests and riots that brought down the Soviet government. These protests only ended after a far right paramilitary backed government cracked down on public media and launched police raids against the largest dissident groups. The country currently has no functional government, as the PM-ship is passed between minority party stakeholders, crime is rampant, and poverty is endemic.