Weichai Power’s 5-MW Diesel Breakthrough Powers a 174% Surge

Weichai Power surges 174% in a year as its 5MW diesel generator becomes critical for AI data centers, with sales up 259% and analysts raising targets.

The transformation of Weichai Power from a conventional engine manufacturer into a critical supplier for artificial intelligence infrastructure has been nothing short of dramatic. The stock closed at €4.73 on Tuesday, hitting a fresh 52-week high, after more than doubling in value since the start of the year. Over the past twelve months, the gain has stretched to roughly 174 percent — a rally that reflects a fundamental shift in how the market views the company.

A World First in Backup Power

At the center of this re-rating sits the 20M61, what the company describes as the world’s first high-speed diesel generator in the 5-megawatt class. Weichai is pitching the system squarely at AI data centers, where demand for reliable backup power has exploded. The numbers back up the narrative: sales of emergency power solutions for data centers surged 259 percent in fiscal 2025.

The momentum carried into early 2026. According to CMBI, sales of backup generators for AI data centers in the first quarter alone rose 2.4 times year-on-year. Market observers describe supply for these specialized power systems as extremely tight.

The large-engine M-series also crossed a milestone, with annual sales exceeding 10,000 units for the first time — a 32 percent increase. Revenue from that segment climbed 65 percent, underscoring the superior margins these products command relative to the corporate average.

Analyst Upgrades and Profit Forecasts

Investment banks have taken notice. Morgan Stanley lifted its price target for the Hong Kong-listed shares sharply to HK$47, maintaining an “Overweight” rating. CMBI raised its target to roughly HK$45 and reiterated a buy recommendation, while JPMorgan sees the company undergoing a comprehensive revaluation.

The profit outlook is improving accordingly. CMBI increased its earnings forecasts for the years through 2028 by as much as 15 percent. Morgan Stanley projects annual revenue and profit growth of around 130 percent from the data center business over the next two years. By that point, the segment is expected to account for more than a third of total corporate earnings. Looking further ahead, the operating profit contribution from power generators is seen more than doubling to roughly 38 percent by 2028.

Jefferies analyst Xiaoyi Lei also confirmed a buy rating with a target of HK$46.40, noting that competitors such as Caterpillar and GE Vernova are reporting record order backlogs — evidence of structural demand for industrial power infrastructure.

Beyond Diesel: Fuel Cells and International Expansion

Weichai is not betting solely on diesel. Its proprietary solid oxide fuel cell system (SOFC) recently received CE certification for the European market, achieving an efficiency rate above 65 percent. That milestone opens the door to Europe’s energy market, and the company is working with UK-based Ceres to industrialize the technology.

In the United States, subsidiary PSI illustrates how far the international transformation has progressed: 81 percent of its revenue now comes from power generation products.

The Traditional Business Holds Steady

While the AI infrastructure story dominates headlines, the legacy heavy-truck business continues to provide a stable foundation. Morgan Stanley expects industry-wide demand of 1.2 million vehicles this year, representing a modest 5 percent increase.

The Bottom Line

Weichai posted total revenue of CNY 231.8 billion in 2025, up 7.5 percent from the prior year. Net profit slipped 4.1 percent to CNY 10.9 billion, but analysts view the margin strength in large engines and the growing international revenue share as stabilizing factors.

The next leg of the valuation story hinges on how quickly the company can convert its SOFC technology into concrete large-scale projects — and whether the 5-MW diesel generator can hold its own against established players in the fiercely competitive data center market. For now, the supply bottleneck in data center power works squarely in Weichai’s favor.