Enphase Surges 14% on AI Data Centre Solid-State Transformer Opportunity

Shares of Enphase Energy (NASDAQ: ENPH) went up 14% on Thursday and 26% for the week after Goldman Sachs analyst Brian Lee wrote a note pointing out that the company's work on solid-state transformers could be a big chance in the market for AI data center power infrastructure.

This is a big change for a business that is mostly known for making residential solar microinverters. It also shows how the building out of AI infrastructure is affecting other industries nearby.

Goldman kept its "Buy" rating on Enphase and raised its price target for the next 12 months from $51 to $57.

What Solid-State Transformers Have to Do With AI

One way that Enphase and AI data centers are connected is through a new architecture that will change how large-scale data centers handle power. According to Nvidia's plan, AI data centers will switch to 800V DC architecture in the next few years. This needs a lot more advanced power conversion technology than regular transformers can provide right now.

Magnetic cores and copper windings are used in traditional transformers. This is technology that is decades old and is becoming less and less compatible with the high power density, reliability, and efficiency needs of current AI server deployments. Solid-state transformers use semiconductor-based power electronics instead of a magnetic core. This makes switching faster, improves efficiency over a wider operating range, and allows for the exact power control that high-performance GPU clusters need.

Late in April, Enphase made its solid-state transformer research program official, and since then, it has been working with possible data center customers. The company plans to start test programs in 2027 and start shipping to customers in 2028. This is in line with when Nvidia's 800V DC architecture is likely to be used by more people..

Lee from Goldman Sachs described the business opportunity: the total addressable market for solid-state transformers is expected to be about 10 gigawatts in 2030, which could mean a $5 billion income opportunity. The company predicts that Enphase will make between $110 million and $910 million in sales in 2030, with earnings per share ranging from $0.21 to $1.75. This is a wide range that accurately shows how early the chance is.

Why Enphase Has Relevant Technology

It makes more sense than it seems to link a residential solar business to the power infrastructure of a data center. Power electronics engineering is what Enphase does best. Specifically, they use semiconductor-based microinverters to change DC power from solar cells to AC power for the grid. The company has spent more than ten years getting better at making things, checking for reliability, and converting power at the semiconductor level, all of which are things that solid-state transformers need.

In early May, the company held a Goldman Sachs investor call to talk about the solid-state transformer chance in more depth. This shows that management is taking this seriously as a business development, not just an announcement based on speculation. The technical details in the presentation that was released along with the official announcement were convincing enough for Goldman to include them in its revised goal price.

The Residential Solar Business: Context for the New Narrative

Enphase's main business, residential solar, is still under a lot of pressure. This is important to know when figuring out how big the data center chance would have to be for the investment thesis to change.

Residential solar demand has been slowing down in both the U.S. and Europe. This is because of changes to California's net metering policy that made solar payback periods longer, higher financing costs due to high interest rates, and channel inventory normalization after a period of distributor overbuilding. In recent quarters, revenue has dropped a lot year-over-year because distributors have been getting rid of extra stock instead of making new orders.

The company's bottom line depends on how well residential installations go, and the short-term view for that market is still cautious. As long as interest rates stay high, it will cost homes more to finance solar panels. Demand is even harder to predict because of the lack of clarity about policy around the Inflation Reduction Act.

In this situation, the solid-state transformer chance could be a second source of income that could help balance out the ups and downs of home solar. However, since pilots won't happen until 2027 and commercial shipments won't start until 2028, it doesn't solve the short-term earnings problem.

The 26% weekly gain shows that the market places a lot of value on the option to enter a $5 billion market where Enphase has a strong technology claim, is the first to market, and is already talking to big potential customers. Goldman's $57 price goal and $110M–$910M revenue range are good ways to deal with the uncertainty. At the low end, Enphase only needs to have minor commercial success, and at the high end, it needs to get a big piece of the AI data center power market, which is still being defined.

In 2027, pilot programs will be the first real business validation. In 2028, shipments will show whether the revenue possibility is moving toward the high end or low end of Goldman's range. Until then, investors are pricing in the possibility of leaving a company whose main business is still facing challenges. This is a standard high-risk, asymmetric upside scenario that the market appears to be choosing to take seriously, as shown by the 26% weekly move.