Olidan station is put into operation, followed by power stations at Porjus and Älvkarleby during Vattenfall's pioneer period.
Coal gets very expensive and is difficult to import, the main energy source of the time. Electrification and demand for electricity picks up.
Recession in Sweden. Electricity demand falls. Construction of Harsprånget is stopped in 1922. Vattenfall enters an administrative period.
FERA – the Association for the Rational Use of Electricity – is formed. Electrification of households and the countryside gets more important.
Sydkraft's, Krångede's and Vattenfall's grids are linked up. The whole country is synchronised for the first time.
The war means energy shortages in Sweden. A major period of large scale investments in hydro power begins. In 1939, the Stadsforsen power station is put into operation, Vattenfall’s first power plant along the river Indalsälven.
Nämforsen power station is planned. The unique rock carvings are saved.
Harsprånget power station is put into operation. The world’s first 400 kV line between Harsprånget and Hallsberg manifests the Vattenfall-Asea cooperation.
The nuclear power plant at Ågesta is put into operation, with technology following the Swedish line – a heavy-water reactor with natural uranium.
Vattenfall starts marketing electric heating to boost electricity consumption.
Vattenfall starts building its first nuclear power plant with light-water reactors.
The government puts a stop to development along the river Vindelälven. With this decision the era of hydroelectric development is over.
The price of oil quadruples in one year. Reduced oil consumption and energy efficiency is on the top of the political and economic agenda.
A referendum on nuclear power is held. Line 2, which will phase out nuclear power at a slow pace, receives the most votes. The Parliament decides that all reactors are to be decommissioned by 2010.
In 1985, Vattenfall’s latest reactor is commissioned at Forsmark.The power consumption begins to level off and Vattenfall changes from a building company to an energy services company.
A serious reactor accident occurs at a nuclear power plant at Chernobyl, Ukraine, in the former Soviet Union.
The Berlin Wall, and thus the entire Iron curtain, falls. Eastern Europe becomes an interesting market.
Vattenfall is incorporated. The national grid is separated from Vattenfall and overtaken by a new public utility, Svenska kraftnät, and Sjöfartsverket (The Swedish Maritime Administration) takes charge over Trollhätte Kanal.
Vattenfall’s expansion in Germany commences. A few years later, Vattenfall is Germany's third largest electricity company.
Vattenfall acquires Thanet in the UK, an offshore wind power project. Two years later, a wind farm with 100 wind turbines is opened in the English Channel.
