New York, June 2, 2026, 05:03 EDT
Fluence Energy stock popped up in pre-market trade Tuesday, after jumping 44% to close at $27.15 Monday. The battery storage group rallied behind news it’s part of a new power architecture for next-gen AI data centers involving Siemens and Nvidia. nVent Electric, which is also involved in the project, was up about 2.8%. Nvidia added 6.3%, according to Investors Business Daily.
Nasdaq’s regular market hadn’t started at the time. Pre-market hours run from 4 a.m. to 9:30 a.m. Eastern Time, then regular trading takes over until 4 p.m. Prices before the open are often more volatile because there’s less volume.
Siemens’ announcement means investors are now seeing Fluence as more than a clean-energy storage stock. The company gets pulled into the discussion around AI data centers, where grid constraints, backup power and power quality are a bigger deal for builders.
Siemens said June 1 it built a reference design for Nvidia DSX Vera Rubin NVL72 AI data centers, working with Nvidia, Fluence, and considering nVent’s design approach. The reference design shows how power goes from a utility feed through distribution and up to AI hardware racks.
Fluence is looking at a 136 megawatt setup, with 100 megawatts set aside for IT load, according to Data Center Dynamics. That size puts Fluence among electrical manufacturers, cooling vendors, and grid-service firms chasing the current AI data center surge.
Jeff Monday, chief growth officer at Fluence, said Smartstack is “central to this new architecture.” Siemens says Fluence’s battery storage is built for AI sites to manage voltage and frequency ride-through, keep systems up during power blips, support black start capability, respond to grid demand, and smooth out AI power swings. Siemens Press
Nvidia moved first back in March, rolling out its Vera Rubin DSX AI Factory reference setup and Omniverse DSX digital-twin roadmap. The company said these are built to deliver better “token per watt” — basically, more compute for the same energy. NVIDIA Investor Relations
Fluence’s rally comes after the company posted second-quarter results tied to hyperscalers. On May 6, Fluence reported Q2 revenue of $464.9 million and a net loss of $29.2 million. Backlog hit a record $5.6 billion, and order intake doubled to $2.0 billion so far this year. Fluence also said it signed master supply deals with two major hyperscalers. Chief Executive Julian Nebreda said the “customer expansion strategy is gaining momentum.” CFO Ahmed Pasha pointed to “strong liquidity.” GlobeNewswire
Competition is intense. In January, Reuters said Fluence was benefiting from the bigger surge in power use, quoting Jefferies analysts calling it “one of the few players able to deliver compliant solutions at scale.” That push for power to run AI has been pulling investor money into names like Bloom Energy, and on Monday nVent saw buying too, a sign that interest is moving into electrical and cooling suppliers. Reuters
There is a catch. A reference architecture doesn’t count as a booked order, and Fluence flagged in its quarterly filing that its contracted backlog might not show up in revenue as planned, or at all. The company also said customers could delay or drop orders for outside reasons. If AI data-center work slows, grid hookups get held up, or borrowing costs climb, the share-price move on Monday may be tough to hold.
For now, investors keep paying for optionality. Fluence is up with its new Nvidia tie, solid backlog, and presence with hyperscalers. The next step looks more routine: turning plans and supply deals into firm orders, revenue, and margins.
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