The electric current can not be accumulated in large quantities, but it must always be generated a quantity corresponding to that which is being used.
By teaming with foreign countries for the production of electric current can be adapted in a better way the needs and production.
When in our country the requirement of electrical current is greater than the production, we are forced to import electricity. This is the case especially during the winter when our power plants are not able to produce a sufficient amount of current. In summer semester, however, our electricity production is greater of requirements, so that we are able to export.