The U.S. data center market has handed a Korean engine maker a sizeable gas engine order. HD Construction Equipment of the HD Hyundai group (The Elec reports the order under the name HD Hyundai Infracore) signed a contract on 7 October with ERock, a U.S. supplier of distributed power systems, for gas engine long blocks worth 390 billion won. Korean press converted that to between $276 million and $291 million depending on the exchange rate used. Deliveries run from 2027 to 2028.
The engines are high-efficiency gas units in the 22-litre class. ERock will build them into generator sets that supply power to hyperscale data centers run by large U.S. technology companies, according to The Korea Herald and the Seoul Economic Daily. Neither the end customers nor the sites have been named.
A Long Block, Not A Genset
What HD ships is a partially assembled engine; The Elec describes the long block as the main engine assembly without the fuel and ignition systems. The alternator, controls, base frame and cooling package are the packager's work. This is a common split in the gas genset business, and it is the reason the order shows up under an engine maker's name while the finished product will carry another.
For anyone planning a site around such sets, it also means the engine data and the package data come from two different companies. The heat that has to leave the jacket water and the charge-air circuit is fixed by the engine; how it is taken away, and at what site temperature the set still holds its rating, is decided by the packager. When we see a gap in an enquiry, it is usually here: the engine sheet arrives, the package conditions do not.
Bigger Engines From Gunsan
The company is not stopping at 22 litres. It says its new engine plant in Gunsan, North Jeolla Province, is due to be completed later this month and will serve as the production base for large power generation engines from 1 MW to 3 MW. The Korea Herald reports plans for a 37-litre engine of about 1.5 MW in 2027 and a 77-litre engine of about 3 MW in 2028. The company described the ERock contract as recognition of its engine technology in the data center power market.
That size range is where the established gas and diesel genset engines for data centers sit today, and where lead times have been longest. A new source of 1-3 MW engines is of direct interest to packagers who have been waiting for slots, though a new engine family needs field hours before buyers of prime or standby power treat it like the incumbents.
Who ERock Is
ERock describes itself as a company that designs, deploys and maintains distributed generation systems based on natural gas, combined with its own software, for commercial, industrial and utility customers in North America. Its gas generator line is aimed at quick deployment for data centers and utilities that need dispatchable power. The contract fits the pattern of the past months, in which engine plants at U.S. data centers have moved from stopgap to planned supply.
Sources: The Korea Herald, Seoul Economic Daily, The Elec, GuruFocus
