China EV/ESS battery: fundamentals remain robust, 2Q earnings are the key catalyst

Overview

This report focuses on the China EV/ESS battery sector. HSBC believes recent stock weakness has diverged from still-resilient operating fundamentals, and the sector correction mainly reflects profit-taking after a strong early-year rally and a market style rotation rather than clear deterioration in demand or cost conditions. The report sees 2Q26 earnings as the next important catalyst and stresses that in the later phase of the upcycle, stock selection matters more than simply capturing sector beta.

Core views

Core views include: first, industry demand remains strong, with EVs and ESS jointly supporting battery demand, and energy storage becoming the main incremental source; second, lithium carbonate prices have stabilized in the RMB150k-200k/t range in 2Q, so the cost side has not entered an extreme cycle; third, as cyclical recovery is gradually priced by the market, investors will increasingly focus on earnings quality, earnings sustainability, and the next structural growth drivers; fourth, CATL remains HSBC's preferred battery exposure due to its scale, end-market diversification, and R&D capabilities.

Analysis framework

The report combines industry cycle and fundamental tracking, comparing stock performance with sales, installations, production schedules, raw material prices, and technology roadmaps, while using 2Q26 earnings season as a key window to validate earnings recovery and improved market sentiment.

Methodology notes

• Industry cycle analysisStock-picking framework in the latter half of the upcycle

  After cyclical recovery is increasingly reflected in stock prices, earnings quality, execution capability, and visibility of structural growth become more important than simple beta exposure.

  The report believes China’s battery sector has entered the latter half of the current upcycle, so stock performance will become more differentiated; companies with stronger earnings power, execution, and growth drivers are more likely to outperform.

• Industry drivers analysisDemand-cost-technology three-variable framework

  Demand, costs, and technology together determine sector performance in the next stage.

  Demand is supported by EVs and ESS, with ESS share rising and AI data centers creating medium-term storage demand; lithium price fluctuations increase the value of scale, customer diversification, and pricing power; leadership in sodium-ion, solid-state batteries, and ultrafast charging becomes a source of competitive differentiation.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• CATL H-share/A-share

  Preferred battery sector exposure; explicitly listed as preferred pick

  Strengths

  Scale leadership, diversified end-market exposure, strong R&D capability, and stronger ability to pass through lithium price swings.

  Weaknesses

  The stock has been affected by sector rotation and profit-taking, and near-term performance still depends on 2Q results delivery and market risk appetite.

  Comparison

  Relative to the broader battery sector, the report views CATL as having higher earnings quality, stronger execution, and better visibility of structural growth.

  Risks

  If 2Q earnings recovery disappoints, lithium price volatility compresses margins, or ESS and AI data center storage demand underperforms, the investment case could weaken.

• China EV/ESS battery sector

  Sector allocation theme; recent pullback viewed as excessive

  Strengths

  Demand remains resilient, EV and ESS are two engines, and energy storage is becoming the main incremental source.

  Weaknesses

  Beta potential declines in the latter half of the sector upcycle, with greater stock-level dispersion.

  Comparison

  Compared with CSI300, the battery sector clearly outperformed in the first five months, but has seen a sharp pullback since May.

  Risks

  Insufficient quality of earnings recovery, renewed large swings in raw-material prices, slower-than-expected commercial rollout of technology, and continued market rotation.

• ESS and AI data center energy storage

  Medium-term growth driver

  Strengths

  ESS battery sales in 5M26 were up 88% year-on-year, and AI-driven power consumption has created a narrative of AIDC storage deployment.

  Weaknesses

  Demand realization pace and project economics still need to be monitored.

  Comparison

  Compared with traditional EV batteries, ESS share in incremental demand is rising.

  Risks

  Data center buildout pace, storage tender pricing, policy, and grid interconnection conditions could affect growth visibility.

Key data

• China battery sales783GWh in 5M26, up 47% year-on-yearIncludes exports; of this, EV batteries were 528GWh, up 45%, and energy storage batteries were 256GWh, up 88%.
• April and May battery sales growthBoth up 43% year-on-yearThe report uses this data to show demand resilience and a divergence from the stock pullback.
• Recent sector performanceChina battery index down 13% over the past two months; CATL A-shares down 17%The report sees this pullback as excessive relative to fundamentals.
• Year-to-date to first five months performanceBattery sector up 21%, CSI300 up 4%The report partly attributes the recent pullback to profit-taking after a prior strong rise.
• Lithium carbonate priceStable at RMB150k-200k/t in 2QThe cost side has stabilized and has not entered another extreme cycle.
• China EV battery installations5M26 up 7% year-on-yearWith domestic EV sales slowing, higher energy per vehicle and higher commercial EV penetration provide support.
• Commercial EV penetrationRose to 39% in May 2026Supports an increasing share of commercial vehicle battery installations.

Impact & implications

The report is generally constructive on the China battery industry chain, stating that short-term 2Q guidance and full-year earnings are expected to help restore sector sentiment. Over the medium term, the market is expected to shift from the magnitude of earnings recovery to profitability quality, cost-pass-through resilience, and visibility of structural growth. For investment mapping, leading companies should benefit more, as their scale, customer mix, and technology spend help them weather raw-material volatility and capture ESS and AI data center storage demand.

Risks

• 2Q26 earnings recovery is weaker than expected, causing the catalyst to fail.
• Lithium carbonate prices again swing sharply, compressing margins or disrupting replenishment cycles.
• EV demand slows more than the offset from higher per-vehicle energy content and rising commercial EV penetration.
• ESS and AI data center storage demand is weaker than expected.
• Commercialization of sodium-ion, solid-state batteries, and ultrafast charging lags expectations, or competition increases and erodes leader premium.
• Given the large prior run-up, style rotation could continue to suppress valuation.

What to watch

• Whether 2Q26 earnings guidance and full results validate year-on-year profit recovery.
• Quality and sustainability of earnings and margins, not just growth from a low base.
• Whether production schedules in June and July continue to rise month on month.
• China EV and ESS battery sales, installation data, and export data.
• Whether lithium carbonate prices continue to stay within RMB150k-200k/t.
• Progress of AI data center storage deployments and AIDC-related orders.
• Commercialization progress at CATL in sodium-ion, solid-state batteries, and ultrafast charging.