A building classified as a Public Interest Project,[2] the Electricity Museum unfolds along the perimeter of the old thermoelectric plant – the Tejo Power Station, which illuminated the city of Lisbon for more than four decades.

With the station's expansion, additional adjoining terrain and buildings were acquired over the years, becoming the great industrial complex it is today, with various cultural functions, always with the Tagus River, its namesake, in the backdrop.

In October 2015 EDP announced that London-based architectural practice AL A formed by Amanda Levete is designing a Kunsthalle sitting alongside the existing museum, to host a wide-ranging programme of exhibitions under the leadership of Pedro Gadahno.

Having been musealised, boiler number 15 stands out, thereby enabling visitors to enter it and discover its structure and internal components (conveyor belt, Bailey walls, naphtha burners, water heating tubes, etc.).

Aside from the boilers, this large space also tells the story of the construction of the Tejo Power Station and gives a first approach to the difficult working conditions endured by its workers.

The priority has been to recover elements that are worth exhibiting, through their restoration and conservation, as well as the acquisition, preservation and inventory of new pieces from other facilities from all over the country, or from private donors.

[7] At the moment, the Museum houses a large quantity of movable effects on exhibit, such as boilers, turbo alternators and condensers from the 1930s-1950s, as well as collector's items, such as pieces and equipment dating from the end of the 19th century until modern times.

To highlight, the collection of household appliances, electric machines, pieces and molds of public and private lighting in wood and iron, laboratory equipment, valves, models etc.

More than 90 000 photographs and approximately 15 000 books, most of them specialising in electricity (in all its aspects: technical, constructive, economic, historic or social), as well as monographs on industrial heritage and archaeology, museology, themes surrounding general culture, encyclopedias and periodic publications.