ZEREZ ID: Simplified Registration for New Inverters & Solar Battery Storage from February 2025
13.06.2025
From 1 February 2025, registration of new inverters and solar battery storage systems is intended to become significantly easier. With the new ZEREZ ID, relevant certificates are bundled centrally, reducing administrative effort.
What are the advantages of the ZEREZ ID?
- Faster registration – fewer forms and more efficient processing.
- Automated processes – less paperwork.
- Greater transparency – certificates are available centrally.
- Future-proofing – later changes or extensions can be easier to handle.
- Faster approval – grid operators can access the relevant data digitally.
Automation is intended to reduce bureaucracy and make applications easier for grid operators to process.
Who does the new requirement apply to?
According to the article, the ZEREZ ID is mandatory from 1 February 2025 when:
- a new solar system is installed,
- a new inverter is commissioned, or
- a battery storage system is newly installed or extended.
Existing systems are not affected; the requirement described here applies to new installations.
How does registration with the ZEREZ ID work?
- When purchasing a new inverter or battery storage system, a ZEREZ ID is assigned to the relevant certified product.
- The ID links to the certificates required for registration.
- The grid operator can retrieve the certificate data digitally, reducing the need to submit individual documents manually.
Do I need to take action now?
The product-specific ZEREZ ID is normally provided with or can be identified for the certified inverter or storage system. The certificate data can then be used by the grid operator as part of the registration process.
Frequently asked questions about the ZEREZ ID
What does the ZEREZ ID cost?
The article states that no separate fee is charged to the system operator simply for the product's ZEREZ ID.
Is a ZEREZ ID also required for existing systems?
The article states that the new requirement applies to new equipment/installations from 1 February 2025 rather than unchanged existing systems.
Which grid operators accept the ZEREZ ID?
The ZEREZ register is used in Germany as the central register for unit and component certificates required for grid connection.
How does the ZEREZ ID differ from previous registration processes?
Instead of repeatedly submitting individual certificate documents, the ID allows the relevant certificate information to be retrieved digitally from a central register.
Can the ZEREZ ID be used for later changes?
If a system is extended or equipment is replaced, the corresponding ZEREZ IDs of the installed certified components can be used in the updated registration process.
Which countries use the ZEREZ ID?
The article refers to the German registration framework.
Less bureaucracy – more efficiency
The ZEREZ ID is intended to make registration of solar systems, inverters and battery storage systems easier, faster and more transparent through digital certificate data.