ESS, LFP and the Battle to Turn Korea’s Battery Technology Into Durable Returns
For much of the past two years, South Korea’s battery industry has been caught between two powerful forces.
On one side was the global slowdown in electric-vehicle demand, which left newly built factories underutilized, compressed margins and pushed several Korean battery makers into losses.
On the other was China.
Chinese battery and material manufacturers continued expanding production capacity even as prices fell, pushing lithium-ion battery prices to levels that became increasingly difficult for producers outside China to match.
By 2026, however, something began to change.
LG Energy Solution returned to quarterly operating profit in the second quarter.
Samsung SDI returned to profit after seven consecutive loss-making quarters.
SK On (a subsidiary of SK Innovation) also reported its first quarterly operating profit in seven quarters.
More importantly, the recovery was not driven solely by electric vehicles. Energy storage systems, utility-scale batteries, UPS systems and battery backup units for AI data centers began emerging as meaningful sources of demand.
That creates a much more interesting investment question than simply asking whether the EV cycle has bottomed.
Korea has spent decades developing some of the world’s most advanced rechargeable-battery technology, particularly in high-nickel chemistries, energy density, safety engineering, manufacturing quality and qualification with global automotive manufacturers.
But technology alone does not guarantee attractive returns.
The real question is whether Korea can convert that technological capability into sustainable profitability in a global market where Chinese overcapacity continues to push the marginal price lower.
That is the question this research examines.
1. Korea’s Battery Turnaround Is Real — But Not Yet Fully Self-Sustaining
The first question is straightforward. Has the turnaround actually begun?
At the reported operating-profit level, the answer is yes.
LG Energy Solution reported second-quarter 2026 revenue of KRW 7.56 trillion and operating profit of KRW 113.3 billion, compared with an operating loss of KRW 207.8 billion in the first quarter.
Samsung SDI reported second-quarter revenue of KRW 3.77 trillion and operating profit of KRW 203.8 billion.
That represented its first quarterly operating profit in seven quarters.
More importantly, the battery business itself returned to profit, generating KRW 159.3 billion of operating profit on KRW 3.52 trillion of revenue.
SK On also reported a dramatic turnaround.
Its battery business generated approximately KRW 2.95 trillion of revenue and KRW 821.8 billion of operating profit in the second quarter, compared with a KRW 349.2 billion operating loss in Q1.
Three major Korean battery makers therefore moved into reported profitability in the same quarter. That is more than a stock-market narrative.
Something has changed in the earnings cycle. But reported profitability is only the beginning of the analysis.
2. ESS Is Emerging as the First Engine of Recovery
The most interesting feature of the turnaround is where it appears to be starting.
It is not primarily a story of global EV demand suddenly returning to its previous growth trajectory.
ESS has become a major part of the recovery.
LG Energy Solution’s first-half 2026 ESS revenue increased 4.6 times from a year earlier and reached the high-20% range of company-wide revenue.
The company also secured more than KRW 3 trillion of new ESS orders during the first half, including projects whose end customers include AI-data-center hyperscalers.
LGES is using five North American manufacturing sites to expand ESS production and expects North American ESS capacity to exceed 50 GWh by the end of 2026.
Source: LG Energy Solution
Samsung SDI shows an even clearer connection between AI infrastructure and battery demand.
The company explicitly attributed its first-half earnings recovery partly to strong demand for utility-scale ESS, uninterruptible power supplies and battery backup units associated with AI data centers.
Its Q2 battery sales also benefited from higher sales of high-power UPS and BBU batteries.
This suggests an important change in the Korean battery cycle.
The first stage of the earnings recovery may not be coming from a broad EV boom.
It may be coming from the electricity infrastructure required to support AI, renewable generation and increasingly power-intensive data centers.
The Korean battery industry is becoming less dependent on a single end market.
But there is also a catch. ESS happens to be one of the markets in which Chinese LFP producers are strongest. So ESS is simultaneously one of Korea’s biggest new opportunities and one of its most difficult competitive battlegrounds.
3. Reported Profitability and Underlying Profitability Are Not the Same Thing
The headline turnaround should not be mistaken for a complete normalization of underlying economics.
LG Energy Solution provides the clearest example.
In Q2 the company reported operating profit of KRW 113.3 billion.
But the quarter also included approximately KRW 241 billion of North American production incentives.
Without that incentive contribution, underlying operating profit would still have been negative by roughly KRW 128 billion.
In Q1, the gap had been even larger.
LGES reported a KRW 207.8 billion operating loss while recognizing an estimated KRW 189.8 billion of North American production incentives.
This tells us two things at the same time.
First, U.S. industrial policy is materially supporting Korean battery economics.
Second, the underlying business is genuinely improving.
Excluding the incentive, LGES’s operating loss narrowed sharply between Q1 and Q2.
The business had not yet reached full standalone profitability, but the underlying direction was clearly better.
Samsung SDI also said Q2 profitability benefited from Advanced Manufacturing Production Credit benefits associated with higher U.S. production, as well as tariff refunds.
SK On requires even more caution.
Management explicitly said its Q2 results included one-time factors, including customer compensation, while higher U.S. tax credits and expanded Asian sales also helped earnings.
Its KRW 821.8 billion operating profit therefore should not be interpreted as a normalized quarterly earnings run-rate.
Korea’s battery earnings are recovering.
But part of that recovery is still being financed or accelerated by industrial policy, customer compensation and other non-recurring items.
For investors, the key metric is therefore not simply operating profit. It is the direction of operating profit after identifiable incentives and one-offs.
4. Why EV Recovery Alone Does Not Explain the Turnaround
EV demand is helping.
LGES reported stronger European pouch-battery shipments and stable cylindrical EV-cell demand.
Samsung SDI reported higher European EV battery sales.
SK On benefited from stronger Asian volume.
But none of the three companies describes the current recovery as a straightforward return to the previous EV supercycle.
Instead, the earnings improvement reflects a combination of ESS growth, AI-data-center demand, higher factory utilization, cost restructuring, localized North American production, U.S. production incentives, and selective EV demand improvement.
That makes the current cycle structurally different from the one that drove Korean battery valuations earlier in the decade.
The old model was from largely EV penetration. the new model looks broader, EV + ESS + AI power infrastructure.
If this diversification persists, it could make future earnings less dependent on any single EV cycle. But it also changes the competitive landscape.
In EVs, Korea’s strongest position historically has been in high-performance nickel-based chemistry.
In ESS, LFP dominates. And LFP is where the Chinese supply chain is most concentrated.
5. The Recovery Has Not Reached Every Part of the Korean Value Chain Equally
Cell makers and cathode producers should not be treated as one industry.
The recovery in battery cells is already visible. The recovery in cathode materials is much less uniform.
EcoPro BM reported Q2 2026 revenue of approximately KRW 576.7 billion and operating profit of around KRW 18.0 billion. It remained profitable, but both revenue and operating profit declined significantly from the year-earlier quarter.
Source: EcoPro BM Investor Relations
L&F presents a different picture.
Its Q2 revenue reached approximately KRW 885 billion and operating profit KRW 20.8 billion. Shipment volume was reported at a quarterly record, with ultra-high-nickel products continuing to represent the large majority of volume.
But profitability was materially below Q1, illustrating how volume recovery does not automatically translate into stable margins in cathode materials.
POSCO Future M also demonstrates why the upstream recovery may lag.
The company is expanding beyond NCM and preparing LFP production specifically to address ESS demand. It has approved a dedicated LFP cathode plant and is also converting some existing NCM capacity toward LFP production.
This tells us something important. Korean cathode producers themselves are responding to the chemistry shift.
The Korean strategy is no longer simply high-nickel or nothing. It is increasingly defend the technological premium in high-performance nickel batteries while simultaneously building a non-Chinese LFP supply chain.
That may eventually become one of the most important changes in the Korean battery industry.
6. China’s Battery Overcapacity Is the Real Stress Test
Now we reach the harder side of the thesis: Can the Korean recovery survive the Chinese price attack?
That concentration alone does not prove that every Chinese factory is economically irrational. Nor should nameplate capacity simply be divided by current battery deployment to calculate industry utilization. New factories take time to ramp, chemistries are not perfectly interchangeable and different plants serve different markets.
But the directional picture is difficult to dispute.
Battery production capacity has expanded much faster than end-market deployment.
The effect has been intense competition and persistent downward pricing pressure. Average global battery prices fell approximately 8% in 2025 after an even larger decline in 2024.
LFP prices declined by more than NMC prices, widening the price gap between chemistries. And China is not merely producing batteries for its domestic market.
The IEA notes that Chinese EV production exceeded domestic demand in 2025, contributing to a doubling of Chinese electric-car exports to more than 2.5 million vehicles.
In the first quarter of 2026, Chinese EV exports more than doubled again from a year earlier.
Capacity expansion → intense domestic competition → lower prices → pressure on margins → stronger incentives to export → global price pressure
That is the competitive environment Korea has to survive.
7. Price Advantage or Market Distortion?
This requires an important distinction.
Chinese batteries are observably cheaper.
That does not automatically mean the entire price difference represents a sustainable economic cost advantage.
The IEA estimates that average battery-pack prices in China were approximately 30% below North America and 35% below Europe in 2025.
LFP packs were more than 40% cheaper on average than NMC alternatives.
Those price differences are real. But price and sustainable economic cost are not the same thing.
Some of the difference clearly reflects genuine structural factors.
China has enormous manufacturing scale. It has a highly integrated battery supply chain. It dominates processing of several critical battery materials.
LFP uses lower-cost materials than high-nickel NMC.
Chinese manufacturers have also accumulated substantial experience in high-volume prismatic-cell manufacturing. Those factors should not be dismissed.
But another set of facts complicates the story.
The IEA reports that many Chinese cathode-material producers continue operating at a loss while expanding production capacity.
It specifically notes sustained losses among LFP cathode producers, with only limited exceptions, and warns that current conditions are unlikely to be sustainable over the long term.
This raises an important question.
If prices reflect a fully sustainable economic cost advantage, why are significant portions of the upstream industry unable to earn adequate returns at those prices? That does not prove deliberate dumping.
But it does suggest that observed prices can be influenced by a competitive structure in which excess capacity and weak profitability persist longer than they might in a conventional market where losses rapidly force plant closures and capital withdrawal.
How much of that price advantage represents sustainable manufacturing efficiency — and how much reflects a system capable of sustaining overcapacity and uneconomic pricing — is a much harder question.
Chinese battery prices are clearly lower. But lower prices do not automatically prove a sustainable economic cost advantage.
A genuine cost advantage must ultimately be overcome through technology or productivity.
An artificially prolonged overcapacity cycle may instead require competitors to survive until the market structure itself adjusts.
8. Beijing’s Own “Anti-Involution” Policy Suggests the Problem Is Real
One reason the overcapacity issue deserves to be taken seriously is that China itself has begun addressing it.
Chinese policymakers have increasingly used the term “involution-style competition” to describe destructive competitive behavior in sectors including electric vehicles, batteries and solar manufacturing.
That matters because the concern is no longer exclusively a criticism coming from Washington, Brussels or foreign manufacturers.
Chinese policymakers themselves have acknowledged the risks associated with excessive investment, aggressive price competition and deteriorating industry profitability.
The more important question is not whether every price cut is centrally directed, but whether China’s industrial system allows excess capacity, weak returns and persistent low pricing to endure long enough to reshape global competition.
What it does demonstrate is that the industrial system has created enough excess competition that Beijing now sees intervention as necessary.
And that produces an interesting paradox. If anti-involution policies succeed, Chinese battery pricing pressure could moderate.
That would help Korean manufacturers.
But consolidation could also eliminate weaker Chinese producers and leave a smaller group of much stronger competitors.
In other words, China’s overcapacity may eventually destroy part of China’s own battery industry. The survivors could become even more formidable.
9. ESS Is Korea’s Opportunity — and China’s Strongest Battleground
This is perhaps the biggest contradiction in the Korean turnaround thesis. ESS is helping revive Korean earnings.
But ESS is also overwhelmingly an LFP market.
According to the IEA, stationary battery storage relies predominantly on LFP chemistry, and LFP demand has expanded rapidly alongside grid storage and data-center investment. China retains an overwhelming concentration in LFP cells, cathode materials and related supply-chain expertise.
In the United States, this is creating an unusual opportunity.
Stationary storage represented roughly one-third of U.S. battery deployment in 2025.
At the same time, more than 50 GWh of U.S. battery manufacturing capacity was reallocated toward LFP production, including capacity associated with companies such as LG Energy Solution and Ford.
That means U.S. policy and AI-driven electricity demand are creating a market for non-Chinese LFP batteries.
For Korean companies, this could be strategically important. They do not have to defeat China on Chinese soil at the lowest possible price.
They need to create a competitive, localized and trusted LFP supply chain in markets where supply security itself has economic value.
That is a different competition.
10. LFP vs. High-Nickel: Where Does Korean Technology Still Command a Premium?
LFP has unquestionably improved. It is inexpensive. But that does not mean nickel-based chemistry is obsolete.
The IEA estimates that LFP packs still have roughly 20% lower gravimetric energy density and approximately one-third lower volumetric energy density than NMC packs.
High-energy-density nickel chemistries therefore retain meaningful advantages in applications where weight, volume, range and performance matter.
This is where Korea’s technological position remains important.
Samsung SDI, LG Energy Solution and Korean cathode manufacturers have decades of experience in high-nickel NCM and NCA chemistries.
They have established manufacturing relationships with major global automakers. They have accumulated qualification history in premium and long-range EV applications.
And they are simultaneously expanding into LFP, mid-nickel, cylindrical 46-series and other chemistries.
Therefore the right question is not will LFP defeat NCM, different applications have different economic requirements.
For mass-market vehicles and stationary storage, cost and cycle life may dominate.
For premium EVs, high-performance vehicles and applications constrained by weight and space, higher energy density can remain valuable.
The Korean challenge is to charge enough of a technology premium in those segments to earn an adequate return.
11. Supply-Chain Concentration Has Changed the Meaning of “Cheap”
The battery industry can no longer be analyzed using purchase price alone.
The pandemic exposed how dangerous concentrated global supply chains can become when production is disrupted.
The subsequent escalation of U.S.-China strategic competition added another dimension, ㅁ battery buyer increasingly has to consider supply interruption risk, regulatory eligibility, geopolitical exposure, quality consistency, and long-term access to critical materials.
This creates a concept that globalization-era supply chains frequently underestimated, that is the cost of dependence.
A product with the lowest quoted price can still create a higher long-term economic cost if the buyer becomes dependent on a single national supply chain.
The scale of concentration makes that concern particularly relevant in batteries.
According to the IEA, production of multiple critical battery components remains heavily concentrated in China, while Korea and Japan are among the few established alternative midstream supply bases.
The strategic significance for Korea is clear.
Korean manufacturers do not necessarily have to be the cheapest supplier in every category.
But they do have to make the economic value of reliability, diversification and technology large enough for customers to pay for it.
12. The United States Is Moving Toward Strategic Separation, Even as EV Subsidies Change
U.S. policy has changed significantly.
The federal clean-vehicle tax credits under Sections 30D, 25E and 45W are no longer available for vehicles newly acquired after September 30, 2025.
That weakens one source of direct EV demand support. But it does not mean U.S. battery industrial policy has returned to a neutral approach toward China.
In February 2026, Treasury and the IRS issued guidance implementing new prohibited-foreign-entity restrictions affecting clean-electricity and energy-storage tax incentives, including Sections 45Y, 48E and 45X.
The rules restrict eligibility when qualifying products receive excessive material assistance from prohibited foreign entities.
That is particularly important for ESS.
The center of U.S. policy is gradually shifting from subsidizing individual EV purchases toward questions of where batteries, materials and energy infrastructure are manufactured and who controls the supply chain.
For Korean manufacturers, that can create a structural advantage even if consumer EV subsidies are weaker than they once were.
The U.S. may buy fewer subsidized EVs while simultaneously becoming more determined to build non-Chinese battery supply chains.
Those two things can happen at the same time.
13. Europe Is Taking a Different Route: De-Risking Rather Than Full Decoupling
Europe should not be treated as a copy of the United States.
Its approach is more complicated.
The European Commission imposed definitive countervailing duties on Chinese battery-electric vehicles after concluding that Chinese BEV value chains benefited from unfair subsidization that threatened economic injury to European producers.
The definitive rates included 17.0% for BYD, 18.8% for Geely and 35.3% for SAIC, with differing rates for other producers.
At the same time, the EU Critical Raw Materials Act explicitly seeks to reduce strategic dependence on individual third countries.
This is not a complete exclusion of China.
It is de-risking.
Europe still wants affordable batteries and EVs. It also wants diversified supply chains, domestic industrial capacity and protection against subsidized competition.
For Korean battery producers, Europe therefore offers a different value proposition than the United States.
In America, strategic separation and localization are stronger.
In Europe, trade defense, sustainability, diversification and industrial policy matter more.
Korea potentially benefits from both but through different mechanisms.
14. Volkswagen Shows Why Supply Chains Are No Longer Just About Market Access
Volkswagen is a useful short case study because it illustrates how quickly the relationship between Western industry and China has changed.
For decades, China was one of the great profit pools Western automobile companies wanted to enter.
Volkswagen built an enormous position through joint ventures with Chinese partners. But the competitive environment has changed dramatically.
Volkswagen’s share of operating results from its equity-accounted Chinese companies fell from approximately €1.74 billion in 2024 to €958 million in 2025.
Source: Volkswagen Group Annual Report 2025
The group itself faced broader profitability pressures in 2025, with operating return on sales falling from 5.9% to 2.8%, although many factors beyond China contributed to that decline, including Porsche-related impairments, U.S. tariffs and restructuring costs.
It would therefore be wrong to say China alone caused Volkswagen’s problems.
But the historical shift is still important.
China was once primarily the market foreign manufacturers wanted access to. It has increasingly become the source of competitors challenging them both inside China and abroad.
Battery supply chains are following a similar pattern.
China is simultaneously a major market, the largest manufacturing base and the dominant global competitor.
That makes industrial dependence much more strategically complicated than it looked during the globalization era.
15. Technology × Economics × Geopolitics
The Korean battery investment case therefore rests on three forces: technology, economics and geopolitics.
Technology alone is not enough.
Korea may possess sophisticated battery manufacturing capability, high-nickel expertise and strong qualification histories with global OEMs.
But technological capability without adequate margins is not an attractive investment.
Geopolitics alone is not enough.
U.S. and European supply-chain policies may create room for Korean producers.
But governments cannot make structurally unprofitable factories attractive forever.
And volume alone is not enough.
Selling more batteries while earning inadequate returns destroys capital rather than creating value.
The sustainable model requires all three forces to align. Technology must create differentiation. Supply-chain restructuring must create market access. Higher utilization must improve economics.
16. The Real Question Is No Longer Demand
The first-half 2026 data suggest that Korean battery demand is beginning to improve.
ESS is growing rapidly.
AI data-center infrastructure is creating new applications.
EV demand is contributing selectively.
Utilization is improving.
Reported earnings are turning upward.
But demand recovery alone does not solve the industry's problem.
The real question is whether demand can be converted into acceptable returns while Chinese overcapacity continues exerting pressure on global pricing.
A company can increase shipments and still destroy shareholder value. A factory can operate at higher utilization and still earn below its cost of capital.
Government incentives can generate accounting profit without establishing a sustainable standalone business.
The next stage of the Korean battery turnaround therefore needs to produce something more valuable than revenue growth.
It needs to produce cash.
Conclusion — Can Technology Outrun China’s Overcapacity?
Korea’s battery turnaround has begun. That conclusion is increasingly supported by actual earnings rather than simply stock prices.
LG Energy Solution returned to reported quarterly profit.
Samsung SDI returned to profit after seven loss-making quarters.
SK On also reported a quarterly turnaround.
ESS has become one of the most important drivers of recovery. And AI infrastructure is adding another source of battery demand through data-center backup systems and power infrastructure.
But this recovery is occurring inside a global battery market shaped by extraordinary production concentration and persistent pricing pressure.
Production of several important battery materials is even more geographically concentrated. Those numbers should not be mistaken for proof of superior technology or sustainable economic efficiency.
They show something else, the scale of global dependence on one national supply chain.
At the same time, parts of the Chinese battery-material industry continue operating at weak or negative profitability while capacity remains enormous. That makes the sustainability of current pricing an essential question.
The lowest observed price is not necessarily evidence of the lowest sustainable economic cost. The pandemic and the subsequent restructuring of global supply chains changed the calculation. Supply security, diversification, political reliability, localization and technology prevail.
The United States is incorporating those considerations directly into tax and supply-chain rules.
Europe has imposed countervailing duties after formally concluding that Chinese BEV subsidies threatened economic injury to European industry.
That creates an opening for Korea although it does not guarantee success.
Korean battery manufacturers still have to prove that their technology, manufacturing quality and trusted supply-chain position can command enough economic value to overcome persistent price pressure.
That is why the ultimate investment question is not whether Korean battery demand will recover. It has already begun to recover.
The question is whether Korea can turn that recovery into durable returns.
Can high-performance technology command a premium? Can Korean manufacturers build a viable non-Chinese LFP and ESS supply chain?
Can higher utilization translate into sustainable margins? Can policy-supported earnings evolve into underlying profitability?
And ultimately, can ROIC rise above the cost of capital while free cash flow turns sustainably positive?
If the answer is yes, 2026 may prove to have been more than the bottom of another battery cycle.
It could mark the beginning of a new phase in which Korean battery technology, ESS demand and global supply-chain restructuring finally reinforce one another.
If the answer is no, rising battery shipments will not be enough.
Because in the end, technology only becomes an investment advantage when it earns a return.
And that is the real battle behind Korea’s battery turnaround.