A Renewable Energy Bubble Is Hit By the Perfect Storm

Good luck finding an industry hit as hard by inflation and supply-chain upheaval as wind-turbine makers.

Manufacturers like Vestas Wind Systems A/S have been blown off course by a perfect storm of transport snarl-ups and surging freight and raw material costs. Instead of raking in profits on soaring demand for clean energy, the Danish firm is struggling just to break even. Last week, loss-making European rival Siemens Gamesa Renewable Energy S.A ousted its chief executive officer — its second change at the top in less than two years. General Electric Co.’s renewables arm is also losing money.

This is a worrying turn for an industry with a vital role in helping the world decarbonize. For investors, it shows how betting on seemingly clear-cut “megatrends,” such as the rise of renewables, can backfire in the short-term. With oil prices rising above $90, oil stocks have massively outperformed clean tech in the past year. It’s a reminder, too, that even highly consolidated industries like wind-power machinery can struggle to pass on rising input costs to customers.

A year ago, the turbine makers were flying high. A gush of money flowed into clean-tech stocks, and investors didn’t have all that many wind-equipment firms to pick from. Outside of China, the three top players I’ve mentioned control around three-quarters of the onshore market. No wonder valuations ballooned.

But as the profit warnings piled up, the money flows faded and European wind stocks plummeted. Vestas’ has almost halved since last year’s peak, while Siemens Gamesa’s has fallen even more. Hedge funds have shorted the shares of smaller German turbine maker Nordex SE, betting that prices will fall further. (GE’s renewables unit isn’t separately listed.)

When you consider the size and complexity of a wind turbine, it’s no wonder they’re struggling: The rotors of high-spec onshore models span more than 160 meters (525 feet) and a nacelle (the central structure) can weigh several hundred tons. The latest offshore turbine designs are even larger.

Almost 85% of a wind turbine’s mass is comprised of steel, according to BloombergNEF. It’s not hard to imagine what’s happened to that bill of raw materials. Even after a recent pullback, steel prices are almost double pre-pandemic levels. Copper and resin prices have also surged.

Logistics is an even bigger headache. Due to the size of these machines and local rules, the process of assembling wind turbines is spread all over the world. That’s a challenge when supply chains are running smoothly. But delivery times for some components has increased from five to nearly 50 weeks, Siemens Gamesa said earlier this month. Delays add further cost and can trigger customer penalty clauses, making the transportation and installation of turbines, blades and towers very costly endeavors.

This wouldn’t be such a problem if manufacturers could quickly pass on cost increases to customers. Unfortunately, their order backlogs stem from a time when raw materials and logistics costs were much lower, and it appears they weren’t able to fully protect themselves against price increases via hedging. Analysts expect Siemens Gamesa to burn more than 750 million euros ($860 million) of cash in the fiscal year that ends in September, in part because it’s holding more inventory as a safety cushion against delays.