Battery energy storage systems (BESS)
How Union-origin requirements could affect battery-storage costs
This model prices the extra cost of European lithium iron phosphate (LFP) cells, then traces it into battery packs, utility-scale storage and home systems. It does not price every part of the proposed legal package.
Core scenario
The cell-price gap narrows further downstream
EU cell production with Chinese material supply
EU-production cost premium(relative to using Chinese products)
EU-production cost premium(relative to using Chinese products)
The core cell is produced in the EU using Chinese upstream materials. A full-EU-cell-supply-chain case and higher alternative source estimates are available in the model below.
01 · What the proposal requires
The legal scope extends beyond cells
Listed inputs inside an LFP cellCathode sideLFP cathode active materialAluminium current collector SeparatorKeeps electrodes apart ElectrolyteCarries lithium ions Anode sideGraphite anode active materialCopper current collector
Battery cellRequired to be Union-origin after year 3
Battery-management systemSeparately required above 1 MWh, and after year 3
Thermal-management systemOne option for the additional component after year 3
Finished stationary BESSPack, controls, thermal management, power equipment and enclosure
Finished stationary BESS
The system must originate in the Union. Above 1 MWh, its battery-management system (BMS) must also originate in the Union.
BESS + BMS + cells + one more component
The additional component is selected from the official main specific-component list.
02 · One linked calculation
How the cell cost gap shrinks from cell to electricity
The cell premium is diluted by an explicit cost share at each step. Residential storage branches from the battery-pack result.
- 01
LFP cell
EUR 59 versus EUR 51 per kWh in the core scenario.
- 02
Battery pack
The cell premium is weighted by the approximate 70% pack share.
- 03
Turnkey BESS
The pack premium is weighted by its share of a European four-hour turnkey system.
- 04
Levelised cost of storage (LCOS)
Average cost per unit of electricity delivered over the system's life. The turnkey premium is weighted by the capital-cost share.
Residential branchBattery pack → installed residential BESS
Residential systems are much smaller and include a distinct integration, installation, software and service layer.
03 · Explore the model
Adjust model assumptions
Cell scenario
Choose a source estimate
Source preset
Roland Berger — EU cell production with Chinese materials
Cost shares further down the chain
These editable shares connect pack, turnkey BESS, LCOS and residential-system results in one linked calculation.
Sources
Evidence used in the linked model
Roland Berger 2025
Fully ramped cell production. The imported-Chinese comparator includes a tariff-and-logistics category; cell format and stationary end use are not specified.
Commission IA · 26%
Cell-production cost, not a delivered import price. The 26% case uses the same chemistry, yields, automation and material margins, with EU-produced cathode and anode active materials and region-average energy prices. It is an alternative sensitivity, not directly comparable to Roland Berger's delivered-cell price.
McKinsey · 37.5%
Factory-production cost. The Chinese cell is not delivered to Europe; regional financing, materials, labour, energy, construction and yield assumptions differ. LFP is explicitly described as relevant to stationary BESS.
T&E · 90%
Current ramp-up production-cost scenario based on IEA and BloombergNEF models and focused on EV batteries. It is deliberately an upper sensitivity, not an observed stationary-cell import comparison.
Commission / Battery Atlas
Approximate all-application pack share. Non-cell pack integration, BMS, thermal management and housing remain unchanged in the model.
Derived · Roland Berger + IRENA
The 47.9% factor is the implied Chinese-reference pack value (EUR 51/kWh divided by a 70% cell share, then converted at 1.13 USD/EUR) divided by IRENA's USD 172/kWh European turnkey cost. IRENA does not publish its embedded pack price, so this is an editable translation factor rather than an observed cost share.
Lazard 2026 · capital share
Illustrative US 100 MW / 400 MWh standalone system. Only the 59.2% capital-share ratio is used, as an editable cost share.
Derived · Roland Berger + McKinsey
The 16.2% factor equals the reconstructed EUR 72.9/kWh Chinese-reference pack divided by the EUR 450/kWh Asian-manufacturer midpoint. It is a cross-source share, not an observed McKinsey pack breakdown, and the residential denominator excludes the inverter.
McKinsey residential BESS
Fully installed residential BESS hardware including installation and excluding inverters. Manufacturer category does not establish legal origin, and the bands also reflect brand, warranty, integration, software and service differences. They are shown as market context, not treated as an IAA compliance premium.
Regulation (EU) 2025/1178
The IAA proposal uses this official list when it requires one additional main specific component after year three. It does not require every listed item to be Union-origin.
COM(2026) 100
The cost model prices only the extra cost of EU-produced cells. It does not price final-BESS origin, BMS origin or the additional later-phase component.