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B.Grimm Power Public Company Limited
B.Grimm Power builds and runs power plants that sell electricity and steam to the Thai government and to factories, plus some plants abroad.
B.Grimm Power is a power producer. It builds and operates electricity generating plants, then sells the electricity — and in some cases the steam — to two main kinds of customers: the national grid run by Thailand's state electricity authority, and large industrial users like factories that need both power and heat to run their operations.
The heart of the business is what the industry calls "small power producers" and "very small power producers" — plants that are big enough to be useful but small enough to be built close to the factories that need them. Many of these plants run on natural gas, and some use renewable sources. The twist that makes B.Grimm more than a plain electricity seller is cogeneration: the plant produces electricity and captures the leftover heat as steam, then pipes that steam straight to nearby industrial customers. A factory that would otherwise burn its own fuel to make heat can just buy the steam next door. That gives B.Grimm a stickier customer relationship than a pure grid seller has, because it is supplying a utility the factory genuinely needs every day. Its biggest customer is effectively the Thai state grid, which buys power under long-term contracts. That makes revenue fairly predictable — the plants are paid for output over many years, so the business behaves less like a commodity trader and more like a landlord collecting rent on expensive machines. The risk sits mostly on the cost side: fuel prices, especially natural gas, and the debt used to build the plants. B.Grimm has been expanding internationally into countries like Laos, Vietnam, and South Korea, and it has pushed into renewables such as solar and wind, partly to reduce its dependence on gas.
The name is worth a note. B.Grimm traces back to a German pharmacist, Bernhard Grimm, who came to Siam in the 1870s; the family trading house he founded eventually grew into this energy company and other businesses. Today it is one of Thailand's larger private power producers, and it pays a dividend to shareholders. The simple version: it owns power plants, sells the electricity and steam under long contracts, and its job is to keep those machines running and financed at a reasonable cost.
Saved answer · last researched 12 Nov 2026