Answer:
The electrical grid is really multiple areas of use and production that are all connected. So if one area over produces they can sell the electricity to another area. Some overproduction is purposeful as some electricity is lost as heat loss during transmission. But purposeful overproduction helps areas make profits. The USA sells electricity to Canada and Mexico for example.
[This article ](https://www.eia.gov/energyexplained/electricity/electricity-in-the-us-generation-capacity-and-sales.php) Has more of you’re interested
Latest Answers