Battery passport for energy storage
from home storage to BESS
From 18 February 2027, every storage system above 2 kWh newly placed on the market needs a battery passport. DPP Hero structures your data based on DIN SPEC 99100, no IT project.
Is your storage in scope?
EU Battery Regulation 2023/1542: Article 77
- ✓
Home storage above 2 kWh
PV storage systems for private households
- ✓
Commercial and industrial storage
Stationary storage systems for businesses
- ✓
BESS and containerized large storage
Grid-supporting battery energy storage systems
- ✓
UPS and communications infrastructure
Industrial batteries above 2 kWh
- ✓
Second-life and refurbished storage
Receive a new, linked passport
- ✕
Device batteries
Laptops, tools and similar devices are out of scope
What applies to storage systems from February 2027
EU Battery Regulation 2023/1542 requires a digital battery passport for every newly placed industrial battery above 2 kWh. It is retrievable by QR code. All deadlines at a glance: battery passport duty: from when and for whom?.
Legal basis
EU 2023/1542
Article 77 of the EU Battery Regulation, supplemented by delegated acts
Scope
Newly placed on the market
Existing installations do not need retrofitting
Access
QR code per battery
Public product page with role-based access levels
Responsible party
Economic operator
Manufacturer, importer or authorised representative: also when cells are bought in
Why energy storage is the most demanding case
Modular systems, bought-in cells, second-life concepts: storage manufacturers have the most complex data flows. They benefit most from structured capture.
Modular architecture
Storage systems consist of modules, racks and packs. The passport applies per battery placed on the market.
State and lifetime
Capacity, cycle life and temperature ranges belong in performance and durability, structured instead of hidden in PDFs.
Reuse and refurbishment
Refurbished batteries receive a new passport linked to the original one.
Model-level carbon footprint
LCA balance, performance class and lifecycle stages captured in a structured way.
Purchased cells
Cell chemistry and raw-material origin often come from suppliers. Share links let partners provide data directly.
Labeling on housing
Each published product gets a public URL and downloadable QR code (PNG or SVG).
Structure data today, be ready in 2027
If you structure product data now based on DIN SPEC 99100, you only need to publish in 2027.
View regulation statusFrom the storage datasheet to the published passport
DPP Hero brings the details of home storage units, industrial batteries and BESS together in one place: self-service, no rollout project, hosted in German data centers.
Capture per storage unit
Seven DIN SPEC 99100 steps, each field explained.
- Auto-save with conflict detection
- Create product variants by duplicating
- CSV import and REST API for full catalogs
Collaborate with suppliers
Cell makers and partners fill their sections themselves via share links.
- Granular section permissions
- Sites and contacts managed centrally
- Data flows directly into the battery passport
QR code and exports
Public product page with QR code, export data at any time as JSON or PDF.
- GS1 Digital Link as identification standard
- JSON in BatteryPass Data Model format
- Hosting and product pages included in all plans
Which operating data the passport actually carries
With storage systems it is often assumed that the battery passport shows the current state of the installation. That is not the case. Annex XIII separates two sets of data: details about the battery model and details about the individual battery. Only the second set is updated over the service life, and it is not public.
What Annex XIII point 4 requires
Four entries sit there. The performance and durability values under Article 10(1), at placing on the market and at every change of status. The state of health information under Article 14. The status, held in the editor as Original (First placing), Repurposed, Reused, Remanufactured or Waste. And the data resulting from use. State of health is what the data sheets call SoH.
What counts as usage data
The regulation gets concrete here. Required are the charging and discharging cycles and negative events such as accidents. Plus the periodically recorded conditions of the operating environment including temperature. And the state of charge. If you do not log this anyway, set up the recording before the first passport. Maintenance and fault events belong in the passport where they fall under this.
At which level the measurement happens
Annex XIII speaks of the individual battery, not the module. With modular storage, settle first what the battery placed on the market is. The number of passports follows from that. And the level at which you collect condition data.
Who may see the data
These entries do not appear on the public product page. Annex XIII point 4 makes them accessible only to persons with a legitimate interest, such as recycling and repair operations. The public part of the passport is unaffected.
Why the condition data matters to operators
Article 14 governs an access that goes beyond the passport. For storage operators it is the real lever. Since 18 August 2024 stationary battery energy storage systems must hold current data on state of health and expected lifetime under Annex VII in the battery management system.
Read access for the lawful acquirer
Read access to these parameters goes to whoever has lawfully acquired the battery, at any time and without discrimination. That includes independent economic operators and waste operators. It also includes third parties acting on their behalf. The intellectual property rights stay protected.
Three purposes named by the regulation itself
The access serves three purposes. First, making the battery available to independent aggregators or market participants for energy storage. Second, assessing the residual value or remaining lifetime and the capability for further use on the basis of the state of health. Third, facilitating preparation for re-use or for repurposing, as well as repurposing or remanufacturing.
For operators this means: residual value and second life depend on data that has to sit in the battery management system anyway. Kept properly, it can be evidenced when selling, continuing to operate or dismantling. Missing, it leaves the operator negotiating without proof.
An honest limit belongs here too: the regulation prescribes access to data, not a market value. What a used storage battery finally fetches is decided by the market, not by the passport.
Two definitions in Article 3 carry the answer. A manufacturer is whoever manufactures a battery, or has it designed or manufactured, and markets it under their own name or trademark. Placing on the market is the first making available on the Union market. Both fit the system integrator who assembles modules and racks into a storage system and delivers it under their own name: they owe the passport for that system, while the cell manufacturer owes it only for what they place on the market themselves. How far industry has come with the product passport is in the review of the Hannover Messe.
The EU registry and what of it exists today
The passport does not hang on your system alone. The Commission is building a central registry holding the identifiers of the passports. A test environment for it has been reachable since 20 July 2026; the interfaces for production use and the semantic catalogue are announced for the fourth quarter of 2026 according to the Commission DPP help desk.
What that means for planning
Anyone choosing a system today should ask about the later connection to this registry. As long as the interfaces are missing, nobody can deliver it finished. Advertising it as available promises something the Commission does not yet provide. What is binding today is the data scope from Annex XIII. That can be prepared.
Due diligence: a second duty with a deadline of its own
Alongside the passport stands supply chain due diligence. It only hits economic operators above the turnover threshold in Article 47. That is 40 million euros net turnover in the financial year before last, and it applies only from 18 August 2027. For many operators that means: first check whether the threshold is reached. Then plan your own deadline separately from the passport date. The wider frame is covered by the overview digital product passport.
Frequently asked questions about storage battery passports
Does the battery passport requirement apply to home storage?
Yes. Home storage batteries count as industrial batteries; above a capacity of 2 kWh the battery passport obligation applies from 18 February 2027. A unit of exactly 2.0 kWh is not covered yet, as Article 77(1) says “more than 2 kWh”.
Do existing storage installations need retrofitting?
No. The requirement only applies to batteries newly placed on the market from 18 February 2027.
How does this work for systems with multiple modules?
The passport applies per battery placed on the market. Exact implementation details depend on how the battery is placed on the market. The underlying data structure is explained on the DIN SPEC 99100 software page.
What applies to second-life and refurbished storage?
Reused or refurbished batteries receive a new battery passport linked to the original one.
What does preparing a storage passport cost?
The first passport stays free permanently, with all core features. For a whole product line you pick a paid plan from €49 per month; the plans are tiered by the number of new passports per month. The tiers in detail on the pricing page.
At what level does the passport sit: cell, module, pack or container?
To the battery that is placed on the market. Article 3 defines the battery as a device consisting of one or more cells, modules or packs. A stationary battery energy storage system is therefore an industrial battery with internal storage. If you deliver a finished system, the passport hangs on that system, not on every cell. If you deliver modules that someone else assembles, your modules need the passport. The system builder creates their own for their product. Settle this before capturing data, because it decides how many passports you keep.
Who is responsible when the system is assembled on site?
The economic operator placing the battery on the market or putting it into service (Article 77(4)). With a containerized or site-assembled storage system that is usually the system integrator handing over the finished system, not the cell manufacturer. The system integrator ensures the data is correct, complete and current, and may transfer that authority only in writing. Buying modules and building a system from them makes you subject to the passport duty yourself.
How do operating figures such as state of health get into the passport?
Annex XIII point 4 lists the state of health as data on the individual battery. It is visible only to persons with a legitimate interest. Which parameters those are is in Annex VII. For stationary storage that is remaining capacity, where applicable power capability and round trip efficiency, the evolution of self-discharge and where applicable ohmic resistance. The regulation names no fixed update frequency. Article 77(4) requires current data, in practice at every change of status. Modules age differently. So it pays to keep the values per module rather than as a system average.
Do replacement racks we install into an existing system in 2028 need their own passport?
Yes. Article 77(1) attaches to the individual battery, not to the installation. From 18 February 2027 every industrial battery above 2 kWh placed on the market needs a passport. A replacement battery or an augmentation rack delivered in 2028 is placed on the market in 2028. It therefore needs a passport, even if the installation itself is older. The existing installation gets no passport from this, it keeps its status. For a remanufactured or repurposed battery, Article 77(7) applies. It gets a new passport, linked to that of the original battery.
Prepare your storage data now
Create an account, capture the data of your first storage unit and publish it. One passport stays free permanently, all core features included.