💼 Samsung SDI: Verification Challenges Remain After ESS Outperformance - 2026.11.02

Hi, it’s Peanut 🥜 Let’s check the numbers together first, as always. There’s been talk that LG Energy Solution and Samsung SDI held up relatively well as the Korean stock market fell ^[1]. But did they really? We need to separate whether they held up because of ESS expectations or because of benefits from supply chains moving away from China.

📉 Did ESS help them hold up in the downturn?

Business Post reported that expectations for growth in the North American ESS business supported share prices ^[2]. It also noted the view that U.S. restrictions on China’s battery supply chain could benefit companies shifting away from China. Add expectations for the U.S. midterm elections, and it feels like several catalysts have come together at once. But this is the market’s interpretation reported by the article, not a confirmed company plan or earnings outlook. The more catalysts there are, the easier it is to lose sight of which ones will actually show up in the numbers.

⚠️ Power grid boom: Will they share the same pie?

Bizwatch pointed out that the earnings scorecards of the three battery makers benefiting from the power grid boom are diverging ^[4]. The headline focuses on differences between companies, suggesting that even in a favorable industry, not everyone benefits equally. Korea Economic Daily reported that SK On, Samsung SDI, and LG Energy Solution are changing their fourth-quarter survival strategies while operating only about half of their capacity ^[5]. With half their facilities sitting idle, who gets to claim the boom? We should also keep the possibility of a value trap in mind. Even if demand recovers, a stock that looks cheap may not actually be cheap if that recovery fails to translate into utilization and profits. Put simply, it’s like a plane with many empty seats getting a few more passengers.

🛑 Sodium-ion and ESS certification: New variables?

An article reported that Samsung SDI plans to establish a mass-production base for sodium-ion batteries in Ulsan, initially targeting UPS units for AI data centers ^[3]. There was also news that the materials industry had formed the K-Sodium Alliance. Can these plans be verified? That’s the first question. With no figures available, for now it seems best to note only the direction of travel. Separately, SK On reportedly passed a global fire safety test for ESS ^[6]. While this is about SK On, it can be read as a sign that competition over ESS safety is intensifying. The article also said Samsung SDI signed a large-scale LFP ESS supply contract with a U.S. company last December and converted a line at its Indiana joint venture plant for ESS production ^[6]. Even within ESS, the key is how quickly volumes show up in earnings.

💼 The key variables Peanut is watching

There’s also the view from the securities industry. Han Byung-hwa, a director at Eugene Investment & Securities, discussed why Samsung SDI’s shares fell sharply despite an earnings surprise and assessed the latest results ^[7]. Since this is a guest’s opinion rather than a fact confirmed by the company, it should be treated as a conditional interpretation. Peanut’s view is that even from a short- to medium-term swing perspective, we should keep the bearish scenario open until ESS expectations translate into earnings figures. The reality of half-capacity utilization and optimistic catalysts are both reflected in the same share price. In the end, two questions remain: Will U.S. ESS volumes translate into factory utilization, and how long will it take for new catalysts like sodium-ion to show up in the numbers?

📰 Reference News (6)

2

LG Energy Solution and Samsung SDI outperform in downturn on ESS; benefits from supply chains shifting away from China and U.S. midterm election hopes add to optimism

네이버뉴스 · 2026.11.02

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3

Sodium-ion batteries open the year of commercialization… Time to track supply chain changes

네이버뉴스 · 2026.11.02

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6

SK On passes fire safety test by global certification body… “ESS safety certification”

네이버뉴스 · 2026.11.01

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📺 Reference Videos (1)

7

YouTube

“This is the next stock after Samsung SDI!” A beneficiary of the surge in U.S. ESS demand emerges / Czech nuclear setback.. nuclear stocks on high alert? | Director Han Byung-hwa

▶815머니톡·2026.11.01