The Supplier Onboarding Checklist for Battery Passport Data Collection

Getting battery passport data right starts before you open any compliance software. It starts with your suppliers. Under Annex XIII of Regulation (EU) 2023/1542, battery passport data spans the full supply chain, which means your passport is only as complete as the information your suppliers actually send you. A supplier onboarding checklist for DPP is the most direct way to control that process. This article explains what to include in that checklist, how to structure your outreach, and how to track responses without losing weeks to email threads.

Why Supplier Data Is the Bottleneck

Most manufacturers underestimate how much of their battery passport depends on third-party input. Annex XIII of Regulation (EU) 2023/1542 requires data on materials, sourcing, carbon footprint, recycled content, and supply chain due diligence, almost none of which sits inside your own systems. It comes from your cell suppliers, cathode material producers, packaging manufacturers, and logistics partners.

Late or incomplete supplier responses are one of the most common causes of delayed battery passport compliance timelines. The reason is usually not that suppliers are unwilling. It is that they do not know exactly what you need. When a manufacturer sends a vague request for “compliance information,” suppliers often respond slowly, ask clarifying questions, or send documents that do not match the required format. That creates a back-and-forth that can stretch over weeks.

A structured onboarding checklist that defines exactly what data is needed, in what format, and by what deadline reduces the number of follow-up requests needed per supplier. That is the core argument for building this process before your first passport deadline arrives. If you want a broader view of why this problem is more widespread than most compliance teams expect, read the supplier data problem no one is talking about.

When Battery Passport Requirements Apply

Regulation (EU) 2023/1542 entered into force on 17 August 2023. The battery passport requirement applies to industrial batteries with a capacity above 2 kWh, electric vehicle batteries, and light means of transport batteries placed on the EU market. Article 77 of the regulation sets out the battery passport obligation. Article 78 specifies that the passport must be accessible via a QR code or equivalent data carrier on the physical battery.

The specific date from which battery passports will be mandatory depends on delegated acts that the European Commission has not yet finalised. The requirement is expected to apply from around 2027, pending adoption of the relevant delegated acts under Article 77(3). Do not treat that date as confirmed. Plan your supplier onboarding now so that when the delegated act is adopted, your data collection process is already running.

What Annex XIII Requires From Your Supply Chain

Annex XIII of Regulation (EU) 2023/1542 lists the data categories that must appear in the battery passport. These include:

• General battery model information, including chemistry, capacity, voltage, and intended use
• Battery material composition, including the identity and concentration of hazardous substances under Article 13
• Carbon footprint data per lifecycle stage, as required under Article 7
• Recycled content declarations for cobalt, lithium, nickel, and lead, as required under Article 8
• Supply chain due diligence information under Article 72, covering sourcing of cobalt, natural graphite, lithium, and nickel
• Safety information and certifications
• Information on the economic operator responsible for placing the battery on the market

Each of these categories maps to specific suppliers in your chain. Carbon footprint data for the cell manufacturing stage must come from your cell supplier. Recycled content declarations for cathode materials must come from your cathode supplier. You cannot generate this data internally. Your checklist must assign each data category to the specific supplier responsible for it.

The Supplier Onboarding Checklist for DPP: What to Include

A working checklist covers five areas. Each one removes a reason for a supplier to delay or submit incomplete data.

1. Supplier identification and scope confirmation. Before requesting data, confirm which products the supplier provides that fall within scope of Regulation (EU) 2023/1542. Not every supplier relationship will require a full data submission. A packaging supplier may only need to provide material safety data. A cell supplier will need to provide carbon footprint, material composition, and recycled content data. Define scope per supplier before sending any request.
2. Data category list with Article references. Tell each supplier exactly which Annex XIII categories apply to them. Include the Article number. For example: “We require recycled content declarations for cobalt and lithium as required under Article 8 of Regulation (EU) 2023/1542.” Suppliers who receive a clear, specific data request are more likely to respond quickly than suppliers asked for open-ended compliance information. Specificity removes ambiguity and reduces the number of clarification emails.
3. Format requirements. Specify the file format, unit of measurement, and level of detail required for each data point. If your battery passport platform accepts data via a structured template or API, include that template in the onboarding pack. If you need carbon footprint figures in kg CO₂e per kWh, say so explicitly. Do not leave suppliers to guess what format is acceptable.
4. Submission deadline. Set a specific date, not a vague instruction like “as soon as possible.” Build in a buffer between your supplier deadline and your internal passport compilation deadline. If your passport needs to be ready by a certain date, set the supplier deadline at least four weeks earlier. That gives you time to chase non-responders and correct errors without missing your own deadline.
5. Contact point and escalation path. Name the person at your organisation who owns the supplier relationship for this data request. Give suppliers a direct email address and a phone number. Tell them who to contact if they have questions about the data requirements. Suppliers who cannot reach a real person often delay submission until someone follows up with them.

How to Collect Supplier Data for DPP Without Creating a Chase Process

Sending the checklist is step one. The harder part is managing responses across 20, 50, or 200 suppliers simultaneously. If you track responses through email threads, you will lose visibility quickly. You will not know which suppliers have submitted, which have partially submitted, and which have not responded at all. That makes it impossible to identify which suppliers are blocking a passport’s publication.

Tracking supplier response status systematically (through a shared tracker, a supplier portal, or a compliance platform) makes it possible to see exactly where each passport stands at any point. You can sort by supplier, by data category, or by submission status. You can generate a list of overdue submissions and send targeted reminders rather than blanket follow-ups. That is a significant time saving when you are managing battery passport supplier data across a large supplier base.

For practical guidance on running this process at scale, see how to get 50 suppliers to submit DPP data without chasing them. The article covers how to structure your outreach so that suppliers submit on time without requiring repeated follow-up from your team.

Common Mistakes to Avoid

Several patterns consistently slow down battery passport data collection. Avoid these:

• Sending one generic request to all suppliers. A cell supplier and a packaging supplier have completely different data obligations under Annex XIII. A single generic request forces both to figure out what applies to them, which creates delays and errors.
• Not specifying the regulation. Some suppliers work with multiple customers across multiple jurisdictions. If you do not name the regulation, Regulation (EU) 2023/1542, and the specific Articles that apply, suppliers may submit data formatted for a different standard or a different customer’s requirements.
• Accepting unverified declarations. Article 72 of Regulation (EU) 2023/1542 requires supply chain due diligence for specific raw materials. A supplier’s self-declaration is not sufficient for due diligence purposes. Your checklist should specify what supporting documentation is required: third-party audit reports, chain of custody certificates, or equivalent evidence.
• Setting no internal review step. Supplier data must be reviewed for completeness and plausibility before it enters your passport. Build a review step into your timeline. A carbon footprint figure that is an order of magnitude lower than industry benchmarks should be queried before it appears in a published passport.
• Starting too late. Some suppliers, particularly smaller ones, will need time to gather data they have never been asked for before. Carbon footprint calculations at the cell manufacturing stage may require their own supplier engagement. Give suppliers at least eight weeks from your initial request to your submission deadline for complex data categories.

Prioritising Your Supplier Outreach

Not all suppliers carry equal weight in your battery passport. Start with the suppliers whose data covers the highest-risk or most complex Annex XIII categories. Cell and cathode material suppliers typically hold the carbon footprint and recycled content data that takes longest to compile. Raw material suppliers for cobalt, lithium, nickel, and natural graphite must provide due diligence documentation under Article 72. These are the relationships to onboard first.

Tier your outreach. Send your most detailed, document-heavy requests to tier-one material suppliers in the first week. Send simpler requests (packaging material declarations, safety data sheets) to lower-complexity suppliers in the second week. That prevents your team from being overwhelmed by responses arriving simultaneously and lets you focus review capacity where it matters most.

Once you have a working checklist and a tracking system in place, the process becomes repeatable. When you add a new supplier or launch a new battery model, you apply the same checklist, assign the same data categories, and set the same deadlines. The first round of onboarding is the hardest. After that, the structure does the work.

If you want to see how Traceable supports battery passport data collection and supplier management, visit traceable.digital/pricing to start a free trial. The platform is built to handle Annex XIII data requirements and supplier response tracking in one place.