SolarEdge Falls 4% on Analyst Day Despite Joint NVIDIA 800 VDC Paper; Enphase Energy and First Solar Edge Higher

David Moadel

Thu, September 10, 2026 at 7:07 PM GMT+3 6 min read

Quick Read

SolarEdge drops 3% on Analyst Day despite co-authoring an 800 VDC power framework with NVIDIA, as investors demand revenue timing over lab results.
Enphase and First Solar each climb 2% while the solar ETF slips just 1%, isolating SolarEdge's sell-off as company-specific rather than sector-wide.
SolarEdge's core turnaround is real, with 20% revenue growth and 28.6% gross margin, but its AI data center leg still lacks contracted volume to justify its valuation.
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Shares of SolarEdge Technologies (NASDAQ:SEDG) are down 4% to $33.73 in Thursday's midday session, sliding as management hosts its Analyst Day and after the company published a joint 800 VDC power architecture framework with a leading AI chipmaker. The move stands out because listed solar peers are catching a bid at the same time.

Solar Farm by mcmees24 / BY 2.0 (https://creativecommons.org/licenses/by/2.0/)

Meanwhile, Enphase Energy (NASDAQ:ENPH) shares are up 2% to $37.36. First Solar (NASDAQ:FSLR) stock is climbing 2% to $206.85, extending a bounce that started midweek.

For sector context, the Invesco Solar ETF (NYSEARCA:TAN) is down 1%, a modest slip that leaves SolarEdge as the clear outlier in the group and reinforces that the move is company-specific rather than a sector-wide risk-off session. As broad-market context, the SPDR S&P 500 ETF Trust (NYSE ARCA:SPY) is down 0.5%.

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Lab Milestone Meets a Show-Me Analyst Day

Before the open, SolarEdge said the medium-voltage to 800 VDC conversion stage of its DC powertrain for AI data centers is now operating under load in its engineering labs, with system-level validation of the full path still underway. Alongside that update, the company published a protection and grounding framework for 800 VDC systems, offered as a technology-neutral document any vendor can implement, according to SolarEdge.

NVIDIA (NASDAQ:NVDA) is named as the co-author of that framework. The tie-in matters because the chipmaker's next-generation AI factories are moving toward higher-voltage DC power architectures, and a shared safety and grounding standard is a prerequisite for broader industry adoption. CEO Shuki Nir said the transition will hinge on whether these systems can be protected, serviced and trusted at scale, and that SolarEdge is building the full DC path from utility to rack.

Higher-voltage DC distribution matters because it can cut conduction losses inside a data center hall, freeing up more of the electrical envelope for compute rather than power conversion. Efficiency gains at this level of the stack translate into more compute per megawatt delivered, which is why hyperscalers and chip vendors have coalesced around 800 VDC as the target standard for next-generation AI factories, according to SolarEdge (we profiled seven suppliers powering that buildout, from power to cooling, in a free AI infrastructure report).

The release states plainly that the data center products are still under development, aren't yet generally available, and that nothing in it should be read as a preview of the Analyst Day being held today. That statement effectively caps SolarEdge's commercial disclosure ahead of this afternoon's investor presentations, which likely factors into the negative reaction on a morning shaped by the absence of monetization specifics.

Peers Rally as a Show-Me Reaction Isolates the Stock

Intraday action isolates SolarEdge stock cleanly. Both of the peer stocks mentioned here are higher and the TAN solar ETF is only modestly lower, which rules out a sector explanation for the slide. On Tuesday, SolarEdge shares rose alongside Enphase after Enphase said solid-state transformer power modules were being built at its Texas facility, without any SolarEdge news of its own that session.

That flips today's setup awkwardly. The name that climbed on a rival's actual manufacturing milestone is now sliding on its own laboratory result and white paper, delivered on the morning of an event the release declines to preview. The morning reaction points to demand for revenue timing and customer detail beyond a technology-neutral document.

SolarEdge is deep into a real turnaround on the core business. In its most recent quarter, SolarEdge grew revenue 20% year over year with gross margin expanding to 28.6%, and posted its first non-GAAP operating profit in years. Rising Treasury yields and continued softness in U.S. residential solar remain the standing headwinds against that improvement.

Relative valuations underscore the split. First Solar carries a forward P/E ratio of 9.27x and a contracted backlog of 45.1 GW extending through 2030, giving it the cleanest cash-flow visibility in the group. SolarEdge stock trades on a much thinner near-term earnings base, which makes the AI data center leg the most sensitive part of its narrative.

What to Watch Next

The Analyst Day agenda runs through the afternoon, and the key question for the sell side is whether SolarEdge attaches revenue timing, customer names or unit economics to its Solid State Transformer opportunity. Follow-on notes into the close and Friday's session can shape whether today's show-me reaction sticks or fades.

Investors weighing their exposure to solar-equipment names may want to keep an eye on whether Analyst Day commentary translates into contracted 800 VDC volume rather than more lab validation, according to SolarEdge. Their position sizing should reflect that the turnaround thesis on SolarEdge is intact on the core business, while the AI data center leg still needs commercial proof to justify the multiple embedded in it.

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