Tandem PV wishes to ‘leapfrog’ perovskite from Silicon Valley to the mainstream

Tandem PV’s increase

The last 18 months have actually been hectic for Tandem PV. In March 2025 it raised US$ 50 million from equity capital company Eclipse to money a commercial-scale tandem module assembly line; in April this year, it started operations at that presentation center in the Silicon Valley enclave of Fremont, California; and in August it bagged a US$ 7.7 million grant from the Department of Energy (DOE) that the business stated would accelerate the rollout of its tandem modules, which it declares have a 29.7% conversion performance.

And in June, previous United States energy secretary Jennifer Granholm signed up with the business’s board of directors, bringing genuine market influence and regard.

All of those advancements are “votes of self-confidence from individuals from the outdoors in our capability to be effective,” Wharton states. “Jennifer Granholm is not on lots of boards at all, so it’s a genuine honour to have her getting involved with us. Very same with the DOE– I believe we were the only business in the solar area that won a grant for that specific program.”

Wharton– a serial start-up business owner instead of a solar professional– define a formula for success that would not run out location in a sales pitch: “You require 3 things to commercialise perovskites– performance, resilience and manufacturability.”

Tandem PV has actually revealed performance, he states, with its 29.7% presentation modules, and he declares that the business has actually accomplished less than 1% destruction annually on its items. Those claims have actually obviously been validated by bodies consisting of the National Renewable Energy Laboratory (now the National Laboratory of the Rockies) and Renewable Energy Testing Centre (RETC), though that accreditation has actually been missing from the business’s public statements.

“I believe there have actually been a lot of statements in the market, however they do not truly suggest anything unless you have the sturdiness to be commercially practical,” he states.

“And then the 3rd thing is, can you take all that and not simply make it on a little kind element, however can you do it on something larger? And I believe that’s where we’ve gone just recently. In our demonstration center, we’re now revealing that we’re making big things that have to do with as excellent as what we performed in R&D.”

The commercialisation strategy

How has Tandem PV relatively conquered the deterioration problem that has pestered everybody attempting to commercialise perovskite items throughout the years?

“It’s a tough concern to respond to,” states Wharton, “It’s type of like stating why is Nvidia the very best at chips, or why does Anthropic have an excellent design?”

Tandem PV is not the only business that declares to have actually started business tandem module production. UK-based Oxford PV has actually apparently offered its very first commercial-scale tandem modules for pilot screening, together with accrediting its patent portfolio to significant business solar makers, and other gamers have actually made claims about approaching commercial production.

Wharton states that his business’s group is a huge part of its success, including “about 20 PhDs” and its primary innovation officer, Colin Bailie, who was associated with establishing what was apparently the world’s very first silicon-perovskite tandem cell while at Stanford University. That group developed a platform of services throughout the years, Wharton states.

“I ‘d state a number of years ago we generally got the perovskite steady enough that we might begin seeing other failure conditions,” he describes. “One thing we discovered: in order to make development in toughness, it’s sort of like peeling away layers of an onion– unless you get your core perovskite layer steady, you never ever see all the other failure conditions.

“Once we resolved that issue, then we might keep forging ahead further to go from numerous hours to 1,000 hours to lots of countless hours to being more than a year outside with no deterioration.”

Before completion of the year, Tandem PV anticipates to begin paid trials with “more than a lots of the huge gamers” in the United States independent power manufacturer (IPP) market. The objective is not to generate income, however to get a considerable quantity of modules in the field in order to show that the item is bankable.

Wharton stated the business is preparing to scale up a “gigafactory” by 2028.

The future of solar PV

Tandem PV is directly targeting the utility-scale sector with its tandem modules. That might be a surprise to some, as perovskites are relatively typically considered a specific niche innovation, appropriate for small applications in area, little roofs or other professional releases.

Some have actually gone even more in their scepticism, arguing that time and cash invested in perovskites is efficiently squandered, when crystalline silicon PV is currently plentiful, comprehended, steady and low-cost.

Wharton is determined versus both of those positions. Of the real sceptics, he states “they’re best” that silicon PV is a recognized innovation, however “they do not comprehend how economics works.”

“If you have a 22% [efficiency] panel and it works, terrific. No arguments there.” The worth of a greater performance panel, he states, is that “the more effectiveness you have, you require less labour, less land, less balance of system, and that decreases the general expense. The entire factor the world went from PERC to TOPCon– and you see the entire market moved– was to get a 2% performance [boost]Tandems are 7-12%.”

And he continues: “Unlike the shift from PERC to TOPCon, this is not a replacement. Since they’re tandems, you might take advantage of all of the [existing] TOPCon facilities or other innovations. As soon as you have items out there that are at 30% that are more affordable for the clients, nobody will purchase a 22% panel any longer. If you’re not at 30%, you’re out of company– it’s an essential financial shift.”

Wharton paints that move as the “pointer of the spear” for fixing environment modification. “I understand we’re not expected to speak about that any longer,” he states, referencing the broad market turn away from climate-related messaging towards energy security and financial advantages, especially in the United States. “But that’s why I chose this specific thing [as his next startup project]since I saw it as one of the most significant effects I might have– that the group might have– to resolve environment modification.”

The anti-renewables rhetoric originating from the Trump administration appears not to faze Wharton excessive, and a couple of minutes later on in our conversation, he stresses the value of “much better economics and physics”. In real Silicon Valley style, the innovation becomes his directing light.

“It does not matter what your ideology is. I believe in some cases individuals select things due to the fact that they go, oh, it’s great for the world– and it is. I chose it since it had much better economics and physics; since you can ask individuals to do something that is excellent for the environment, however if it’s not more affordable, many individuals will not do it. I’m depending on individuals doing this due to the fact that they’re greedy, and after that fixing environment modification is a great little after-benefit.”

Silicon Valley solar

In the corner of Wharton’s screen, covering a part of the white-tiled flooring behind him, is a carpet illustrating the California state flag. The state has actually been a historical centre for solar innovation and research study, together with the wealth of other innovations it continues to let loose on the world. And just recently, motions in perovskite tech appear to be coming out of the United States, and especially the West Coast. As Tandem PV, the perovskite glass business Caelux is down the coast outside Los Angeles, and innovation business Swift Solar is likewise in the Bay Area.

“I believe it’s a culture of leapfrogging,” Wharton states. He believes there are 2 methods individuals see the solar market: one, that China is controling production, so United States business must attempt to duplicate their success in the house. The 2nd, that China is controling production, so United States business need to leap ahead to the next frontier.

“Typically, it’s really tough once you’ve lost a market and there’s a group of individuals that are ahead and controling. It’s really tough to win that back. I believe the culture in the United States is more like, well, we lost that– let’s leapfrog and go to the next level, sort of like the United States did on smart phones or video conferencing or AI. Go to the next thing.

“We would not take anything far from what the Chinese have actually done. If you look at why they were so great at silicon, it was generally 25 years of extremely little production tweaks. There’s very little distinction naturally in between PERC and TOPCon, they’re simply little procedure modifications.

“I believe that’s where Silicon Valley has an edge over individuals who are manufacturing-oriented. We understand how to innovate and go much faster and leapfrog in a brand-new location.”

It’s a softer variation on the “relocation quickly and break things” cliché that emerged from the early days of Facebook. Wharton and Tandem PV appear to be the tech brothers of the existing solar market, with a basic faith in innovation and who keen to move as rapidly as possible to “interrupt” the market.

Wharton presumes the ascendence of perovskite tandem items, and discusses it in Silicon Valley terms. “I believe the future, from that perspective, is relatively clear. Now it ends up being more of an execution danger, and what I like about it is we’re vacating the science world more into the procedure engineering world.

“I believe we have a quite well-trodden course to ending up being a multi-billion-dollar business and a leader in this area by scaling up. We simply have the little matter of doing the work, however that’s the enjoyable part.”

Scott Wharton will be speaking at the 2026 edition of PV CellTech conference on 13-14 October in San Francisco, where developments in solar PV production will be an essential of the program. For the complete program and info on tickets, click here