[2] On 6 October 1893, the first Serbian power plant, located in the Dorćol urban neighborhood of Belgrade, began production of electricity.
[3] In 1900, the first alternating current hydroelectric power plant Pod gradom in Užice on the river Đetinja went online.
The first alternating current transmission line from hydroelectric power plant Vučje to Leskovac, with the length of 17 kilometres (11 mi), went online three years later.
Twelve years later, the pumped storage plant Bajina Bašta was built, and in 1990 the hydroelectric power station Pirot was put into operation.
In 2010 the framework agreement for Kostolac B3 was signed with the contractor, China Machinery Engineering Corporation (CMEC).
In July 2021 the country's energy and mining minister stated in an interview that the new energy strategy was under preparation, under it up to 50% electricity would be generated from renewable sources by 2040;[18] later in November 2021 she said in another interview that "by 2040 or 2050 (Serbia) should have zero lignite (consumption)" and that such shift would require minimum 17 billion euro investment.
[20] The company disposes with all necessary equipment for the performance of a whole range of complex activities such as geophysical exploration, control of production of crude oil, gas and geothermal energy.
In 2011 NIS started to expand business in Southeast Europe: in Bosnia and Herzegovina, Romania and Hungary.
NIS refining complex produces a whole range of petroleum products – from motor gasoline and diesel fuel to mechanical lube oils and feedstock for the petrochemical industry, heavy fuel oil, road and industrial bitumen, etc.
The anticipated Bulgaria-Serbia interconnector, offering 1.8 billion cubic meters per year from Bulgaria, is expected to diversify Serbia's gas sources.