It provided electricity for Bangkok from its Wat Liap Power Plant[b] throughout the first half of the twentieth century, and also was a major operator of the city's tram system.

The plant was heavily damaged by Allied bombing towards the end of World War II, but was repaired and continued to operate for almost two more decades.

Electricity was generated by steam engine, mainly using rice husks from the numerous nearby mills for fuel, and distributed along several streets in the city: Tri Phet, Ban Mo, Sanam Chai and Bamrung Mueang going north, and Charoen Krung, Yaowarat and Sampheng to the southeast.

[1] The initial operations met with many obstacles, including unreliability, ballooning costs due to reliance on hired Western engineers, fuel shortages, and theft of electric cables.

Bennet, who sold the rights to a Danish group, headed by Andreas du Plessis de Richelieu, the following year.

[1] The company was sold to a Belgian group in 1913,[2] and was joined in the market by the government-owned Sam Sen Power Plant in 1914.

Wat Liap Power Plant was brought back online after two months, and continued to operate under the company until the end of 1949, when its concession expired.