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PhilEnergy (KOSDAQ: 378340): Solid-State Battery Manufacturing Equipment
The equipment maker that turns laser precision into the pressing and stacking steps a solid-state cell can't be built without.
Who they are
PhilEnergy was carved out of PhilOptics' secondary-battery equipment division in April 2020 and listed on KOSDAQ in July 2023. Its CEO, Kim Kwang-il, spent years running production-technology teams inside Samsung SDI before moving to lead PhilOptics and then PhilEnergy — which explains why Samsung SDI has historically been the company's single biggest customer, and why Kim has been public about wanting to diversify beyond that relationship.
What they do
PhilEnergy builds the equipment that turns battery materials into an actual cell: laser notching machines, stacking equipment, and 46-series cylindrical cell winders. Its signature product is a combined Laser & Stacking (L&S) machine — the world's first to integrate both processes into one unit, according to the company — which it says cuts operating costs by over 90% versus older mechanical press-notching methods. More recently it's extended that laser-and-stacking know-how into solid-state-specific stacking equipment, the mechanically trickier job of layering solid electrolyte sheets without the liquid electrolyte that makes conventional lithium-ion assembly more forgiving.
How they make money
PhilEnergy sells equipment on a contract basis, which means its revenue swings hard with the capex cycles of its battery-maker customers. 2025 was rough — cumulative revenue through Q3 fell 87.9% year-over-year and the company swung to an operating loss, largely because of the broader EV "chasm," European subsidy cuts, and Chinese equipment competition slowing customer investment. 2026 has looked better: a ₩14.76 billion assembly-equipment order in June and a much larger ₩71.2 billion secondary-battery assembly contract in July, alongside a reported UK gigafactory project win, suggest the order book is refilling even if full-year numbers are still catching up.
Where it sits in the value chain
PhilEnergy sits in Manufacturing Equipment — the step that turns electrolyte and electrode materials into an actual cell. Solid electrolytes don't behave like liquid ones on a production line (sulfide needs bone-dry rooms, oxide needs near-semiconductor sintering), so getting the pressing and stacking equipment right is arguably as much of a bottleneck as the chemistry itself.
The bigger trend
PhilEnergy's 2026 pivot is a decent proxy for the whole equipment tier of this chain: after a brutal 2025 stretch tied to slowing lithium-ion capex, growth is now coming from diversifying into solid-state-specific tooling and new geographies (that UK gigafactory win) rather than riding the same conventional battery cycle. Its February 2026 move to take an equity stake in US solid-state developer Factorial — terms still being worked out — points the same direction: equipment makers are trying to attach themselves to whichever solid-state cell developers actually reach production first, rather than betting on one horse.
What to watch
- Whether the July 2026 ₩71.2 billion order and other recent contracts translate into a real 2026 revenue recovery, or remain one-off wins against a still-soft base.
- How the Factorial equity investment shapes up once terms are finalized — a concrete stake would be PhilEnergy's most direct link yet to a named solid-state cell developer beyond Samsung SDI.
- Whether PhilEnergy actually hits its stated goal of generating 40%+ of revenue from customers other than Samsung SDI by 2027.
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FAQ
What kind of equipment does PhilEnergy make?
Laser notching machines, stacking equipment, and cylindrical cell winders for lithium-ion battery assembly, plus stacking equipment specifically adapted for solid-state cells. Its combined Laser & Stacking (L&S) machine integrates two of those steps into a single unit.
Why did PhilEnergy's revenue fall so much in 2025?
Slower EV demand growth (the industry's so-called "chasm"), the end of European EV subsidies, and price competition from Chinese equipment makers all pushed battery manufacturers to delay capital spending — and PhilEnergy sells directly into that capex cycle, so cumulative revenue through Q3 2025 fell 87.9% year-over-year.
Is PhilEnergy dependent on Samsung SDI?
Historically, yes — Samsung SDI has been its largest customer, and CEO Kim Kwang-il previously led production technology at Samsung SDI. The company has stated a goal of getting more than 40% of revenue from other customers by 2027, and recent contract wins and the Factorial investment are steps toward that diversification.