[2][3] In 1886 the company was renamed becoming Société anonyme Électricité et Hydraulique à Charleroi (E&H), by this time the factory was producing dynamos with over 100 kW power.

[2] The company's product range included dynamos, lifts, carbon arc lamps, electric traction motors for trams and drilling equipment.

[9] Between the wars, ACEC began to produce vacuum-based electronics, including mercury arc rectifiers, which replaced rotary converters on Brussels trams in 1929.

[8] In 1939 ACEC began to collaborate with Constructions Electriques de Belgique (CEB), with the two companies rationalising their combined production.

By 1942 raw materials, manufactured parts and tools were beginning to become scarce, and workers at the plant began to be commandeered to work in factories in Germany, mainly those of AEG, Siemens and Brown-Boveri.

[10] In the three decades after World War II the company also expanded into the electronics industry, starting to manufacture products including tape recorders, televisions, and radios.

[13][14] Westinghouse reduced its shareholding to less than 50% by the late 1970s,[15] In 1985, Inductotherm Industries acquired four induction heating businesses from ACEC, including Elphiac (Herstal, Belgium, joint company with Philips).

The main shareholders of ACEC's owner SGB (Suez group and Carlo De Benedetti) announced that the company was to be sold.

in 1989; a plant in Herstal was closed, and traction motor manufacture ceased at Charleroi, moving to one of Alstom's French sites.

[23][31] ACEC-SDT (space, defence, telecommunications) was merged into Alcatel-Bell (CGE majority owner, via Alcatel NV) forming Acatel-Bell-SDT.