Batteries above 2 kWh: what BESS and industrial operators must do before 2027

On 18 February 2027, the Digital Battery Passport requirement of Regulation (EU) 2023/1542 takes effect. Most coverage frames it as an EV obligation, but the text names three categories: EV batteries, light means of transport batteries, and industrial batteries above 2 kWh. That last category is the stationary storage industry. A residential home battery holds 5 to 15 kWh; a single grid-scale container holds several megawatt hours, thousands of times the threshold. If you integrate, buy or operate battery energy storage systems, the mandate reaches your supply chain with the next purchase order.

Which batteries are in scope from 18 February 2027?

The regulation has applied since 18 February 2024, replacing the 2006 Batteries Directive, and it is directly applicable in every member state with no national transposition. The passport obligation starts on 18 February 2027 and attaches to every EV battery, LMT battery and industrial battery above 2 kWh placed on the EU market from that date. Each unit must carry a QR code linked to a unique identifier and a per-unit record structured around the 90+ mandatory attributes of Annex XIII: identity, chemistry, recycled content shares, carbon footprint, performance and durability, state of health and usage data, dismantling and safety information.

"Placed on the market" means the moment of first sale or import into the EU, not the moment of installation. Two consequences follow. First, the mandate is not retroactive: a BESS commissioned in 2025 keeps operating without a passport. Second, it does not stay away for long: any battery placed on the market after the deadline needs one, including the replacement and augmentation modules an operating site will inevitably order. And because most cells and modules are manufactured outside the EU, the importer carries the obligation when the manufacturer has no EU presence. For many storage integrators, that importer is themselves.

What does the mandate mean for storage integrators and operators?

For an integrator, the exposure is direct. If you import modules or racks and place them on the EU market inside your systems, you are the economic operator responsible for the passport being present, complete and correct. A container assembled from compliant hardware but missing its passport data cannot lawfully be placed on the market after 18 February 2027, whatever its electrochemistry thinks about it.

For an operator or project developer, the exposure arrives through the schedule. Utility-scale BESS procurement routinely runs 12 to 18 months between contract signature and delivery. A supply agreement signed today will very likely deliver batteries into the passport regime, so a contract that is silent on passport data is a contract that assumes the problem away. The failure mode is not abstract: batteries without a compliant passport risk being blocked at customs or refused by market surveillance, and in a project financed against a commissioning date, a battery held at a port is a liquidated damages clause coming to life.

What should procurement demand from suppliers now?

The cheapest moment to obtain passport compliance is before signature. Concretely, supply contracts and RFPs for batteries delivering in 2027 or later should require:

• A passport per battery unit: QR code, unique identifier, and a record covering the Annex XIII attributes, delivered with the hardware rather than promised after it.
• Carbon footprint documentation: the declaration is already mandatory for EV batteries since 18 February 2025, with rechargeable industrial batteries scheduled next; ask for the declaration and the calculation basis behind it.
• An updatable state-of-health interface: the passport must carry SoH and expected-lifetime data per Annex VII and keep it current through life, so the supplier must expose a route for operational data to reach the passport, not a PDF frozen at the factory gate.
• Access-tier handling: passport data is tiered between the public, persons with a legitimate interest (recyclers and second-life operators included) and authorities; the supplier should show how each tier is served.
• A documented handover: when ownership transfers at delivery, responsibility for keeping the record current transfers with it and should be named in the contract, together with what happens to data access if the supplier disappears.

None of these items are exotic. All of them are much harder to obtain retroactively, from a supplier who has already been paid.

Do second-life packs entering a BESS need a passport?

Yes, and this is the part of the mandate that storage operators most often miss. The first mass generation of EVs retires between 2027 and 2035, and stationary storage is the natural destination for packs leaving vehicles at 70 to 80% capacity. Under the regulation, a battery that is repurposed is considered a new battery placed on the market: the repurposer takes on manufacturer-type obligations, and the battery needs a new passport of its own, linked to the record of its first life.

That linkage is where the economics live. A repurposed pack with a verified, high-fidelity health history is worth around 30% more on the secondary market than an undocumented equivalent, because the buyer's risk discount and incoming-testing budget collapse. For a BESS operator buying second-life capacity, the first-life passport is the difference between a warrantable, insurable, bankable asset and a crate of used cells. Procurement rules for second-life supply should therefore be stricter, not looser: demand the first-life record, the repurposing rationale, and the new passport that carries both forward.

Who keeps the state-of-health data current during operation?

The passport is not a birth certificate; it is required to stay current. State of health and expected lifetime must be updated through the battery's life, and formal responsibility sits with the economic operator that placed the battery on the market, who may authorise others to perform the updates. In practice the data lives on the operator's site: the BMS and EMS already measure capacity fade, cycle counts, resistance growth and temperature excursions. The workable arrangement is an automated feed from the operating system into the passport, agreed between supplier and operator at contract time.

Operators have their own reasons to want this beyond compliance. A current health record settles warranty and degradation-guarantee disputes with data instead of lawyers. At repowering, it prices the outgoing racks for the secondary market instead of writing them off. And at end of life it routes each pack to reuse, repurposing or recycling on evidence, feeding the recycling chain that must recover 50% of lithium by the end of 2027 and 80% by the end of 2031.

Conclusion: put the passport in the purchase order

The 2 kWh threshold makes the battery passport a stationary-storage regulation as much as an automotive one, and the procurement cycles of the BESS industry mean 18 February 2027 is effectively already here for anything being contracted now. The operators who write passport readiness, SoH data feeds and second-life documentation into their supply agreements today will commission on schedule in 2027; the ones who do not will discover the gap at customs.

Passoria's passport engine structures the Annex XIII record to the EU taxonomy, and our BMS-to-passport bridge keeps state-of-health data current from the operating site. Storage integrators and operators preparing 2027 procurements can join our pilot program alongside manufacturers, resellers and recyclers.