CATL's H1 2026 half-year filing, released via the Shenzhen Stock Exchange on July 25 and reported by Chinese media the evening of July 24, reports revenue of RMB 276.917B (+54.80% YoY) and net profit of RMB 43.284B (+41.98% YoY). Both accelerated. The segment-margin spreads underneath are where the filing's weight sits.
CATL is compressing domestically to hold share while widening its overseas extraction, and the rate at which those two trajectories are diverging sharpened over the past twelve months. A company that can set its domestic margin low enough to discipline competitors while simultaneously growing its overseas premium occupies a position that is structurally different from a company absorbing whatever margin the market offers. The H1 2026 data confirms that difference is widening.
The filing was released in Chinese via the Shenzhen exchange. English-language access to segment-level data from Chinese interim filings typically lags by days to weeks, which is why Tier-2 comparisons below rely on Q1 2026 reported margins and H1 performance forecasts rather than matched-period filings.
Two spreads, both widening
CATL's H1 2025 filing disclosed power-battery-system gross margin of 22.41% and energy-storage-battery-system gross margin of 25.52%. H1 2026: power battery fell to 20.63%, ESS fell to 23.96%. Both segments gave back margin. Power battery gave back more, 1.78 points versus 1.56. The ESS premium over power battery widened.
| Segment gross margin | H1 2025 | H1 2026 | Change |
|---|---|---|---|
| Power battery system | 22.41% | 20.63% | −1.78 pp |
| ESS battery system | 25.52% | 23.96% | −1.56 pp |
| ESS-over-power spread | 3.11 pp | 3.33 pp | +0.22 pp |
The geographic spread moved harder.
| Geographic gross margin | H1 2025 | H1 2026 | Change |
|---|---|---|---|
| Domestic | 22.94% | 21.16% | −1.78 pp |
| Overseas | 29.02% | 29.97% | +0.95 pp |
| Overseas premium | 6.08 pp | 8.81 pp | +2.73 pp |
Overseas revenue reached RMB 87.129B, 31.46% of total, up from RMB 61.208B in H1 2025. Domestic margin fell 1.78 points while overseas margin rose 0.95 points on a revenue base that grew 42% YoY.
The level of each margin fell or held. The spread between them grew. The second derivative, the rate at which the gap is opening, carries more signal than the headline figures. Both segment and geographic axes are diverging simultaneously. CATL can choose where to take margin and where to suppress it, and the H1 2026 data shows those choices sharpening.
Margin at near-full utilization
Margin protection through throttled output is a familiar mechanism. CATL is running the opposite.
| Capacity & utilization | H1 2025 | H1 2026 | Change |
|---|---|---|---|
| Battery-system capacity | 345 GWh | 525 GWh | +52% |
| Output | 310 GWh | 498 GWh | +61% |
| Utilization | 89.86% | 94.86% | +5.00 pp |
180 GWh of half-year capacity added. Utilization up five percentage points simultaneously. The margin structure described above was achieved while running near-full on a substantially larger base.
Monetary funds plus trading financial assets reached RMB 440.212B at June 30, up from RMB 392.506B at year-end 2025 (per the 2025 annual filing). The liquidity buffer grew RMB 47.7B in six months. Capacity under construction: 764 GWh.
A company with this liquidity trajectory can sustain domestic margin compression for as long as it finds it strategically useful. The 21.16% domestic gross margin is not a distress signal for CATL. It is the price of maintaining volume share in a market where the leader's cost structure sets the floor everyone else has to live below. The cash position is growing while it sets that floor.
The Tier-2 gap, measured in available data
Neither EVE Energy nor Gotion High-Tech has filed H1 2026 interim results. EVE's is scheduled for August 18; Gotion's has not been dated. REPT BATTERO's full interim is due by August 31. What exists: Q1 2026 reported margins and H1 performance forecasts.
| Producer | Q1 2026 gross margin | Q1 2026 net margin | Source |
|---|---|---|---|
| CATL (H1 2026, domestic) | 21.16% | — | H1 2026 filing |
| CATL (H1 2026, overseas) | 29.97% | — | H1 2026 filing |
| EVE Energy | 14.04% | 6.98% | Q1 2026 report |
| Gotion High-Tech | 16.06% | 0.21% | Q1 2026 report |
| REPT BATTERO | — | ~4.6–5.9% (H1 est.) | H1 profit alert |
I am comparing Q1 gross margins to CATL's H1 gross margins, so the comparison is imprecise and I flag it as such. The scale of the gap is not a rounding error. CATL's domestic gross margin of 21.16% exceeds EVE's total gross margin by more than seven percentage points. CATL's overseas gross margin of 29.97% is roughly double either competitor's total gross margin. These are gross margins, before operating-expense scale advantages widen the gap further.
The performance forecasts add necessary nuance. EVE's H1 forecast projects attributable net profit of RMB 3.130B to 3.371B, up 95% to 110% YoY, on revenue growth of approximately 60%. Gotion's H1 forecast projects net profit of RMB 1.200B to 1.550B, up 227% to 323% YoY, though non-GAAP profit of RMB 85M to 120M (up only 17% to 65%) suggests non-recurring gains of RMB 1.1B to 1.4B are doing most of the work. REPT turned profitable after a net loss in H1 2025.
These improvements are real. The Tier-2 tail is not uniformly dying. But improving from a thin base while the leader's absolute margin advantage holds or widens is survival at a structurally lower altitude, where profitability depends on volume growth, cost discipline, and favorable product mix, while the leader retains the buffer to compress further whenever competitive conditions require it.
In "Five Forces Under the China Cell Floor", I used CATL's 2025 annual utilization and liquidity as the leader buffer and contrasted it with thinner evidence for Gotion, EVE, and REPT. The H1 2026 filing sharpens that contrast on both axes.
ESS as mix-shift tailwind
ESS battery-system revenue reached RMB 53.261B in H1 2026, up 87.54% YoY from RMB 28.400B in H1 2025. Power-battery-system revenue grew 46.02% YoY. ESS is gaining share of CATL's revenue mix: 19.23% of total in H1 2026 versus 15.88% in H1 2025.
The arithmetic matters. Because ESS carries the higher gross margin (23.96% versus 20.63% for power battery), the faster-growing segment is also the higher-margin segment. As ESS gains mix share, it lifts CATL's blended margin even as both segments individually compress. This is a structural tailwind that Tier-2 producers with less bankable ESS product cannot replicate at the same margin.
CABIA's June 2026 ESS sales figure of 62.6 GWh, +67.5% YoY (as cited in "Five Forces Under the China Cell Floor") provides the demand-side context. Chinese ESS deployment is accelerating, and CATL is capturing that acceleration at a margin premium to its own power-battery business. The concept I've called the "ESS-bankable floor" in prior coverage is visible in this margin data: qualified, bankable ESS supply, meaning cells from producers whose product meets the financial and technical due-diligence requirements of project lenders, commands a premium over generic cell capacity. CATL sits firmly on the bankable side of that divide. (For the pricing evidence, see "Chinese ESS Cell Prices Rebounded 25%".)
Cailian Press reported on July 24 that CATL stated it would not participate in storage-price involution ("不会参与储能价格内卷") and expressed confidence in H2 and 2027 demand; the specific venue of the statement is not identified in the Cailian report. This is a company claim, not a verified pricing commitment. It is consistent with the margin data. A producer running at 94.86% utilization with a 23.96% ESS gross margin has no incentive to chase volume through price cuts in a segment where its qualification advantage already delivers a premium.
Sodium-ion as commercial-route evidence
CATL's TENER product has a stated 1 GWh production target. The company has announced framework agreements with Alfen (5 GWh) and Solarpro (2 GWh). These are agreements, not delivered or contracted volume, and I treat them accordingly: signals that sodium-ion cells are entering procurement conversations with named European counterparties, not evidence of commercial traction at scale.
The policy tailwind is real. The MOF/GAC/STA announcement of July 16 exempts sodium-ion batteries from consumption tax from September 1, 2026 through December 31, 2028. The exemption is product-level, applying to qualifying sodium-ion batteries regardless of end market. The January 8 export-rebate announcement confirms that export consumption-tax refund/exemption treatment continues to apply, meaning the sodium-ion exemption's practical export value is mediated through the existing framework rather than creating a new export-specific advantage.
For CATL, sodium-ion is an option on a future product category that could extend its ESS margin advantage if the chemistry reaches cost and cycle-life thresholds at volume. For Tier-2 producers without sodium-ion production lines, it is another qualification gate to clear in a segment where CATL already holds the margin premium.
Sorting, not converging
The H1 2026 filing resolves a question I flagged in "Three Forces Holding the Chinese Cell Price Floor Through Q4": segment-level CATL power-versus-storage margins were not available in accessible English disclosure at that time. They are now.
What they confirm is durable stratification. CATL's overseas margin premium widened 2.73 percentage points while domestic margin compressed. The ESS-over-power-battery spread widened modestly while both segments fell. Utilization rose on a larger capacity base. Liquidity grew. ESS revenue nearly doubled, gaining mix share at a higher margin. The Tier-2 cohort is improving from distressed levels but not converging toward CATL's margin structure.
The gap between CATL's overseas gross margin (29.97%) and Gotion's total gross margin (16.06% in Q1) does not close through operational improvement on a twelve-month horizon. It closes, if it closes, through structural changes in qualification, brand, and geographic access that take years to build, and that must be built while the leader continues to invest from a growing cash position. That is a self-reinforcing gap.
The practical implication for anyone sourcing cells or evaluating supplier risk: CATL's margin structure is reinforced by the same filtering dynamics (GB38031 qualification, ESS bankability requirements, overseas brand premium) that compress Tier-2 margins. The question going into H2 is whether any of the Q4 compound events alter the channels through which CATL's overseas premium flows. Three converge in a narrow window: the FEOC graphite-anode exemption expires December 31, 2026 (as covered in "Five Forces Under the China Cell Floor"); the MOFCOM critical-minerals export-control suspension closes November 10, 2026; and the VAT export-rebate elimination takes effect January 1, 2027. These are route-level questions, not margin-level questions, and they deserve separate treatment.
The margin spread is the map. The market is sorting into permanent tiers.
- Lithium falls, cells don't: InfoLink's July 22 ESS spot sheet shows battery-grade lithium carbonate averaging RMB 141,000/MT, down 7.2% WoW, while 280 Ah and 314 Ah LFP ESS cells held flat at RMB 0.370/Wh and DC-side systems held at RMB 0.50/Wh.
- MIIT sampling is live: On July 24, state media reported that MIIT inspected GAC Aion and Xpeng plants, randomly sampled vehicles and power batteries, and sent them for national-standard compliance testing, though no named battery-maker failures under GB38031-2025 have surfaced publicly.
- CALB defect case still open: CnEVPost reported that Aion S vehicles using CALB 177 Ah LFP cells had complaints involving swelling, leakage, and insulation faults, with 182 complaints counted from July 1 to July 18 and warranty extensions issued rather than supplier substitution.
- Consumption tax clock starts September 1: The MOF/GAC/STA announcement imposes a 2% consumption tax on lithium-ion batteries from September 1, 2026, rising to 4% from September 2027, while exempting sodium-ion and solid-state batteries through December 2028.