From EV Loser to ESS Winner: The Battery Stocks Riding the Storage Pivot

Korean battery makers just posted their first simultaneous quarterly losses in history — and energy storage is the business pulling them back into the black. Here’s where the real exposure to this theme actually sits.

Four Layers, Four Different Investment Cases

Across the three previous installments in this series, the picture that’s emerged is one of a market reshaping itself around four distinct competitive layers: dominant Chinese cell manufacturers who set the global price floor, Korean producers benefiting structurally from tariff and FEOC policy, U.S.-listed system integrators who combine hardware with software and project delivery, and a long tail of early-stage long-duration storage developers chasing a still-unproven technology bet. Each layer carries a meaningfully different risk and return profile, and conflating them is the most common mistake investors make approaching this sector.

The Chinese Giants: Dominant, But Largely Inaccessible

Any honest accounting of this market has to start with an uncomfortable fact for Western investors: the companies that actually dominate global ESS are mostly out of reach. BloombergNEF’s Q1 2026 Energy Storage Tier 1 List — the industry’s most closely watched ranking of financially credible, execution-proven ESS suppliers — included 49 Chinese companies out of 59 total, or 83.1% of the entire list. CATL and BYD anchor that dominance, commanding both the cell manufacturing scale and the project execution track record that smaller players simply cannot match.

The accessibility problem is structural, not regulatory. CATL trades on the Shenzhen exchange and the Hong Kong Stock Exchange; BYD trades primarily in Hong Kong and Shenzhen as well. Both have ADR or limited international listing options, but liquidity and ease of access for typical U.S. retail investors remain meaningfully worse than for U.S.-listed alternatives. For investors who want direct China ESS exposure, this is achievable but requires international brokerage access most retail platforms don’t offer by default — a real friction point that shapes how most Western portfolios end up structured around this theme.

Korea’s Turnaround Story: ESS Is Pulling EV Losses Back Into Profit

The most dramatic story in this entire series might be happening at South Korea’s battery makers right now. LG Energy Solution, Samsung SDI, and SK On all posted their first-ever simultaneous quarterly operating losses in Q1 2026, driven by a collapse in U.S. EV subsidy support that hammered electric vehicle battery demand across the board. What’s pulling all three back toward profitability isn’t a recovery in EVs — it’s the rapid scale-up of their energy storage businesses, concentrated specifically in the North American market.

LG Energy Solution’s numbers illustrate the magnitude of this pivot most clearly. The company’s ESS segment operating profit is projected to surge from roughly 82.3 billion won (about $54.6 million) in the prior year to approximately 3.6 trillion won (about $2.4 billion) by 2028 — a roughly 44-fold increase driven almost entirely by North American capacity expansion. LGES is targeting more than 90 GWh in new ESS orders in 2026 alone, expanding production capacity to over 60 GWh globally with more than 80% located in North America, leveraging facilities in Holland, Michigan and Lansing, Michigan. The company landed a $1.6 billion, 6 GWh ESS supply deal with Michigan utility DTE Energy in 2026, with batteries destined for an OpenAI-affiliated data center project managed by Oracle — a deal that connects this entire battery storage thesis directly back to the AI infrastructure buildout covered elsewhere on this site.

Samsung SDI tells a similar story at smaller scale. The company posted record quarterly ESS sales of KRW 3.622 trillion in its most recent reported quarter, up 28.4% sequentially, while restructuring its supply chain to comply with U.S. Prohibited Foreign Entities regulations — positioning itself to capture the FEOC-compliant demand examined in the previous installment of this series. SK On is pursuing a comparable strategy, including a 7.2 GWh ESS contract with U.S. renewable energy developer Flatiron Energy. Across all three companies, advanced manufacturing production tax credits under the IRA are expected to nearly triple in 2026, providing a direct earnings tailwind layered on top of organic ESS volume growth.

Fluence Energy: The Clearest U.S.-Listed Pure-Play

For investors who specifically want U.S.-listed, dollar-denominated exposure to ESS without the currency and accessibility complications of Korean or Chinese shares, Fluence Energy is the most direct option. Fluence operates as a system integrator — combining battery hardware (often sourced from multiple cell suppliers) with software and full project delivery — rather than manufacturing cells itself, a business model that captures value across the integration layer rather than the commodity cell layer.

The company’s growth trajectory has accelerated sharply in 2026. Fluence’s project pipeline grew approximately 30% to $30 billion since September 2025, and CEO Julian Nebreda specifically cited “accelerating data center growth, utility demand and rising industrial loads” as the drivers — directly linking ESS demand to the same AI infrastructure buildout covered in this site’s data center cooling series. The company reaffirmed full-year 2026 revenue guidance of $3.2 to $3.6 billion with the midpoint of that range already fully covered by existing backlog as of the most recent quarter, providing investors unusual revenue visibility for a company of its size. Fluence has also signed master supply agreements with two hyperscalers, with its first order conversion expected soon — a potential catalyst for the next phase of growth if data center operators begin directly contracting for battery storage capacity.

Tesla Energy: The Hidden Segment Inside a Mega-Cap

Tesla’s energy storage business — Megapack for utility-scale projects and Powerwall for residential — represents a genuine ESS growth story, but one buried inside a much larger automotive company’s stock price. Tesla appears on BNEF’s Tier 1 list alongside Fluence as one of only two U.S. companies recognized for financial strength and execution credibility in large-scale ESS deployment. The practical implication for investors is straightforward: TSLA stock is not a clean ESS investment vehicle, since automotive demand, autonomous driving narratives, and broader market sentiment toward Tesla as a company dominate its share price far more than energy storage segment performance does. Investors specifically seeking ESS exposure are better served by Fluence or the Korean battery makers, where storage represents a much larger proportion of the investment thesis.

The Long-Duration Speculative Tier

A separate category of smaller, early-stage companies — names like Eos Energy, ESS Tech, and Invinity Energy Systems — are pursuing long-duration storage technologies (iron-air, zinc-based, and flow battery chemistries respectively) that aim to solve a problem LFP and sodium-ion don’t address well: storing energy for 8, 10, or more hours rather than the 2 to 4 hour discharge window typical of today’s lithium-based systems. This is a genuinely important technical gap for grid operators managing renewable intermittency over longer periods, but the companies pursuing it remain pre-scale, with execution risk, balance sheet fragility, and customer concentration far higher than the established players covered above. This series’s earlier installments noted that long-duration technology developers occupy a fundamentally different risk category than LFP-based system integrators or Tier 1 cell manufacturers — appropriate only for investors explicitly seeking early-stage technology exposure, sized accordingly within a portfolio.

✦ THE SCOPE — SERIES SUMMARY

• Stationary battery storage prices collapsed 45% in 2025 alone, becoming the cheapest segment in the entire battery market and unlocking a new wave of grid-scale deployment.
• LFP chemistry’s dominance, built on eliminating costly nickel and cobalt, now faces its first credible challenger in sodium-ion technology, which CATL has moved from lab to commercial-scale deployment within a single year.
• U.S. tariffs on Chinese battery cells have escalated to 82.4% by 2026, yet the U.S. storage market remains structurally dependent on Chinese supply in the near term — creating a multi-year window of advantage for Korean manufacturers.
• LG Energy Solution’s ESS segment operating profit is projected to grow roughly 44-fold by 2028, the clearest evidence yet that energy storage has become Korean battery makers’ primary earnings recovery story after a historic simultaneous EV-driven loss.
• Fluence Energy stands as the clearest U.S.-listed pure-play for direct ESS exposure, with a $30 billion pipeline increasingly driven by AI data center demand rather than renewable grid storage alone.

This content is produced by The Scope for informational purposes only and does not constitute investment advice. All investment decisions are the sole responsibility of the reader. The Scope accepts no legal liability for actions taken based on this analysis.