The battery passport for energy storage & BESS
Home, commercial or container - anyone placing BESS over 2 kWh on the EU market is subject to the passport requirement from 18 February 2027. Batteriepasswerk generates EU-compliant passports per placed-on-market unit - rack, module or system - with mandatory fields per the Commission's 71 EU data points, Annex X and a structure that keeps every rack swap traceable.
Six realities that make the BESS business hard to plan
Cells, modules, racks and containers nest into one another. The shared BMS decides which unit is the battery - and therefore at which level the passport sits.
Cell data, datasheets and certificates arrive from China, Korea, Japan and Europe. Format and completeness vary by supplier.
A BESS lives 10–20 years. The passport must outlast that - version-stable, with audit trail and a clean handover into reuse.
Art. 7 provides for a carbon-footprint declaration, but the delegated act is still missing. The Commission lists the field as not to be filled as of February 2027 and gives no timing yet; once it is adopted, there is more than a year to comply.
Cobalt, lithium, nickel and natural graphite - due diligence from 18.08.2027. Risks must be documented along the chain.
Engraved on housings, possibly with a different resolver later - the URL must stay stable. GS1 Digital Link delivers that.
What the regulation requires from BESS placers on the market
Digital passport per unit
Unique identifier, QR per GS1 Digital Link, mandatory fields per the European Commission's official list of data points (71 data points, Version 2.0, 15 August 2026) - per placed-on-market unit (module, rack, container).
Deadline 18.02.2027Carbon-footprint declaration
Not yet applicable: the delegated act is missing, and the Commission lists the declaration as not to be filled as of February 2027. Batteriepasswerk keeps the field visible as not yet applicable and makes it mandatory via a rule update once the act is adopted.
Date pendingSupply-chain due diligence
Risk-based due diligence for cobalt, lithium, nickel and natural graphite - across all supplier tiers, documented in the passport.
Deadline 18.08.2027From cell to site - one passport per placed-on-market unit
The design decides which unit is the battery: racks that depend on one shared BMS and only work together form one battery with one passport (Commission FAQ 3.2). Racks with their own BMS that work on their own are a battery each. Batteriepasswerk keeps the passport at the right level and records the installed racks and modules underneath it by serial.
Three building blocks that make the difference in BESS portfolios
Structure per passport, master data per model
Master and material data are maintained once on the model and apply to every unit. Per passport you record the installed racks and modules by serial - a rack swap is logged as a repair, without a new passport.
Capture certificates via OCR
Supplier certificates by drag-and-drop. Material, safety and capacity data is detected, validated and written into the passport data model.
Audit trail across a 20-year lifetime
Every change versioned, every version permanently retrievable. EU hosting in Germany, role-based access for recyclers, authorities and owners.
In the dashboard: readiness per rack, per site
This is what a BESS portfolio looks like in Batteriepasswerk - sorted by passport readiness, jump straight into the rack passport.
For BESS portfolios: Pro or Enterprise
Up to ~5,000 active passports and several models fit in the Pro tier. For API/ERP integration, higher volumes and SLAs, we recommend Enterprise.
What storage manufacturers ask most
Ready for 2027? Build your first rack passport for free
Create a model, record racks and modules, ship your first QR code - in under an hour. No IT project, no setup fees.