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Price Board

China BESS cell prices stabilized this week after the prior week's selective concessions. Both InfoLink and SMM converge near CNY 0.360/Wh, though their methodologies and transaction populations differ enough that the proximity in level says less than it appears to.

Lithium carbonate reads differently depending on which day you check. InfoLink's midweek assessment fell 2.8%; SMM's Friday print rose 1.08%. The two-day gap between assessment dates explains the divergence. EV cells ticked up fractionally across LFP and NMC, consistent in direction but within assessment noise.

System-level BESS prices held flat on both assessors. Korean contract ASP and defense pricing remain unobservable in public data this week.

Price Board

China BESS cell prices stabilized this week after the prior week's selective concessions. Both InfoLink and SMM converge near CNY 0.360/Wh, though their methodologies and transaction populations differ enough that the proximity in level says less than it appears to.

Lithium carbonate reads differently depending on which day you check. InfoLink's midweek assessment fell 2.8%; SMM's Friday print rose 1.08%. The two-day gap between assessment dates explains the divergence. EV cells ticked up fractionally across LFP and NMC, consistent in direction but within assessment noise.

System-level BESS prices held flat on both assessors. Korean contract ASP and defense pricing remain unobservable in public data this week.

BESS Cell

InfoLink BESS Cell Flat After Prior Drop

280 Ah and 314 Ah LFP ESS cells averaged CNY 0.360/Wh on August 5, unchanged WoW. Prior week's −2.7% decline reflected selective concessions on Q4 orders from major customers rather than broad repricing. Rate of decline: −2.7% to 0%.

BESS Cell

SMM 314 Ah Index Down Fractionally This Week

SMM's 314 Ah LFP ESS-cell index: CNY 0.3605/Wh on August 7, −0.39% WoW. Covers 100–500 MWh spot transactions. Level sits within CNY 0.0005/Wh of InfoLink's CNY 0.360, but different methodology and transaction population. The convergence in level does not constitute cross-validation.

Lithium Carbonate

InfoLink Lithium Carbonate Gave Back Prior Rebound

Battery-grade lithium carbonate averaged CNY 140,000/MT on August 5, −2.8% WoW after the prior week's +2.1% bounce. InfoLink revised its H2 midpoint lower, projecting CNY 130,000–150,000/MT. SC6 spodumene CIF China at $2,020/MT, −1.7% WoW.

Lithium Carbonate

SMM Lithium Rose on a Different Clock

SMM's August 7 domestic delivered index: CNY 142,926/MT, +1.08% daily. Two-day gap from InfoLink's August 5 print means the sources show opposite directions this week. This is a timing difference. The two prints should not be reconciled into a single weekly move.

System Price

China BESS System Prices Unchanged This Week

InfoLink's 2-hour DC-side liquid-cooled system averaged CNY 0.49/Wh on August 5, flat WoW. SMM's 5 MWh stack also flat at CNY 0.434/Wh. BOS costs are the binding constraint now: PCS, thermal management, and commissioning margins are holding system prices even as cell costs stabilize.

EV Cell

SMM China EV Cell Prints Ticked Up

August 7 SMM prints: 100 Ah prismatic LFP at CNY 0.3995/Wh (+0.25% WoW); 5-series NMC at CNY 0.630/Wh (+0.24%); 6-series NMC at CNY 0.6245/Wh (+0.16%). All three sub-0.3%, within assessment noise, but directionally consistent upward across chemistries.

Korean ASP

Korean Cell ASP: No Observable Weekly Change

Q2 earnings from LGES, Samsung SDI, and SK On mix corporate-level scope with 45X/AMPC subsidies, tariff refunds, and customer compensation. None disclosed a comparable $/kWh cell ASP. These reports supply utilization and mix data, not a trackable price series. No significant change.

Defense Pricing

Defense Cell Pricing Still Absent From Public Data

DIBC's BES-26-01 seeks domestic cylindrical-cell capacity but guarantees no offtake volume. Packet Digital's $9.8M award bundles equipment, materials, and pilot production with no MWh denominator. QPL-32565 updated August 6 with no qualified products listed. No $/kWh derivable. No significant change.

The Velocity Synthesis

BESS Spot Decline Stopped; the Range Matters More Than the Midpoint

By Ronan Adike— August 8, 2026

Feature image for article: BESS Spot Decline Stopped; the Range Matters More Than the Midpoint

The BESS spot decline didn't decelerate this week, it stopped: −2.7% WoW to 0% in a single week. InfoLink's range held at CNY 0.330–0.390/Wh, but CNESA's H1 data shows framework buyers took 60.1% of awarded capacity and no public source discloses what they paid, which means the midpoint describes the minority of volume. Section 122's 10% surcharge expired July 24 with no extension enacted, dropping the confirmed US tariff stack on Chinese LFP cells to 28.4%. Lithium's weekly move fell below cell-price assessment resolution.

The Velocity Synthesis

BESS Spot Decline Stopped; the Range Matters More Than the Midpoint

By Ronan Adike— August 8, 2026

The BESS spot decline didn't decelerate this week, it stopped: −2.7% WoW to 0% in a single week. InfoLink's range held at CNY 0.330–0.390/Wh, but CNESA's H1 data shows framework buyers took 60.1% of awarded capacity and no public source discloses what they paid, which means the midpoint describes the minority of volume. Section 122's 10% surcharge expired July 24 with no extension enacted, dropping the confirmed US tariff stack on Chinese LFP cells to 28.4%. Lithium's weekly move fell below cell-price assessment resolution.

Transmission Threshold

Sizing the Lithium-to-Cell Impulse

Argonne's BatPaC cost model (ANL/CSE-24/1, Table 36) puts contained lithium in an LFP pack at 0.09 kg/kWh. This is an automotive pack figure, not a measured 314 Ah ESS cell bill of materials, but it is the best publicly sourced primary number available. Convert to lithium carbonate equivalent via the stoichiometric ratio (x5.32) and the sensitivity coefficient is ~0.48 kg LCE per kWh.

InfoLink's August 5 battery-grade carbonate average fell CNY 4,000/MT WoW. Multiply through: 0.48 x CNY 4.00/kg = CNY 0.0019/Wh. That is 0.5% of InfoLink's CNY 0.360/Wh cell midpoint, and it sits inside the noise floor of both InfoLink's CNY 0.060/Wh assessment band and SMM's weekly 314 Ah index movement (CNY -0.0014/Wh over the same period). At this magnitude, the weekly lithium move falls below the resolution of the price assessments tracking cells.

Iron phosphate precursor, meanwhile, rose ~45% in H1 2026 to RMB 14,500-15,000/MT (SMM, July 13-16), narrowing whatever room lithium relief might create. The explanation for "cells didn't follow lithium" is the size of the impulse itself.

Transmission Threshold

Sizing the Lithium-to-Cell Impulse

Argonne's BatPaC cost model (ANL/CSE-24/1, Table 36) puts contained lithium in an LFP pack at 0.09 kg/kWh. This is an automotive pack figure, not a measured 314 Ah ESS cell bill of materials, but it is the best publicly sourced primary number available. Convert to lithium carbonate equivalent via the stoichiometric ratio (x5.32) and the sensitivity coefficient is ~0.48 kg LCE per kWh.

InfoLink's August 5 battery-grade carbonate average fell CNY 4,000/MT WoW. Multiply through: 0.48 x CNY 4.00/kg = CNY 0.0019/Wh. That is 0.5% of InfoLink's CNY 0.360/Wh cell midpoint, and it sits inside the noise floor of both InfoLink's CNY 0.060/Wh assessment band and SMM's weekly 314 Ah index movement (CNY -0.0014/Wh over the same period). At this magnitude, the weekly lithium move falls below the resolution of the price assessments tracking cells.

Iron phosphate precursor, meanwhile, rose ~45% in H1 2026 to RMB 14,500-15,000/MT (SMM, July 13-16), narrowing whatever room lithium relief might create. The explanation for "cells didn't follow lithium" is the size of the impulse itself.

Calculation chain

Li intensity: 0.09 kg Li/kWh (Argonne ANL/CSE-24/1, Table 36; LFP pack basis)
Li to LCE: x5.32 (molecular weight ratio Li2CO3 / 2Li; stoichiometric)
LCE intensity: ~0.48 kg LCE/kWh (derived)
Weekly carbonate move: CNY -4,000/MT (InfoLink, Aug 5)
Cell-cost impulse: 0.48 x 4.00 = CNY 0.0019/Wh
Share of cell price: 0.0019 / 0.360 = ~0.5%

What this does not cover

Argonne models 125 Ah automotive cells; 314 Ah ESS electrode loading differs, so true lithium intensity may vary
Assumes immediate full pass-through: zero inventory buffer, contract lag, or hedging
Single-week move only; cumulative declines (e.g., CNY -33,000/MT since early June) produce proportionally larger impulses warranting separate analysis
Iron phosphate is a separate, rising cost input outside this calculation

Source Trail