Blaine Harden, in his book about the only known prisoner to have successfully escaped from a "total-control zone" grade internment camp in North Korea, Shin Dong-hyuk, writes that the Kim family dynasty has failed to build or maintain a reliable national electricity grid ...
... even though the mountains of North Korea are crisscrossed with swift rivers, large and small. Prior to the partition, 90% of the electricity on the Korean Peninsula came from the North.
Although Pyongyang has two power stations, the electricity supply is in a perpetual state of emergency. Neither power station produces enough power to supply more than one district at a time. What does that mean for the Yanggakdo Hotel rotating restaurant? It only rotates very rarely!