The Challenge
Highway construction through Guangxi's mountainous terrain runs ahead of the grid — the tunnel section that needs the most power is precisely where no utility connection exists. Tunnel boring support, ventilation fans, dewatering pumps, and the concrete batching plant together demand megawatt-class power around the clock, with heavy motor-starting loads and no tolerance for interruption while crews are working underground.
The contractor also had a regulatory requirement: the unit had to comply with China's Nonroad Stage III emission standard for construction machinery. They needed one large, efficient, compliant unit — not a farm of small gensets — delivered and commissioned on a construction timeline.
Our Solution
We delivered a 1870kW open-type genset built on the Weichai Baudouin 12M55 — the first unit of this platform delivered in Guangxi Province. The V12 engine uses high-pressure common-rail injection, meeting China Nonroad Stage III emissions while cutting fuel consumption against the mechanical-injection units this power class traditionally relied on.
The engine is paired with an EvoTec H-class alternator sized for the site's motor-starting demands, and the complete unit passed full-load factory testing before transport to the mountain site.
High-pressure common-rail Baudouin 12M55 — China Nonroad Stage III compliant, with measurably lower fuel burn per kWh than mechanical-injection units of the same class.
Single-unit megawatt-class output with an EvoTec alternator sized for heavy motor starting — ventilation fans and pump groups start direct-on-line without staggering site operations.
Full-load factory acceptance test completed before dispatch, then commissioned on site by our engineers to match the contractor's construction schedule.
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The Result
The unit was commissioned on site to the contractor's schedule and now carries the tunnel section's full construction load as the site's sole power source. Common-rail fuel efficiency translates directly into fewer fuel deliveries up the mountain road — a logistics saving the contractor counts weekly — and the successful first delivery has established the 12M55 platform as the contractor's reference configuration for subsequent grid-isolated sections.
One 1870kW package now carries a complete tunnel worksite, demonstrating delivery capability at the 2MVA class for grid-isolated infrastructure projects.