The purpose of §14a EnWG and §9 EEG is to ensure grid stability and protect energy infrastructure in light of increasing electricity demand and decentralized energy generation. They enable grid operators to control high-consumption devices (like wallboxes and heat pumps) during peak load times or grid bottlenecks, helping to balance supply and demand more effectively. §9 EEG additionally aims to dim local PV systems for short times, in order to avoid the statically configured 70% limitation as it was in the past.

Comply with §14a EnWG and §9 EEG with a ready-made solution EEBUS powered by KEO.

§14a EnWG and key points BK6-22-300 (BNetzA, 27 November 2023).

  • §14a EnWG target: the objective is to ensure grid stability and protect the infrastructure.

  • From 1 January 2024: Consumer devices such as wallboxes and heat pumps from 4.2 kW must be controllable and able to be integrated into the grid management system (§14a EnWG, BNetzA).

  • From 15 March 2025, the technical requirements are as follows: The majority of VDE/FNN is in favour of EEBUS as a uniform minimum standard for digital interfaces. The BSI/BMWK followed the proposal.

  • From 1 January 2029, devices with purely analogue controls will no longer be connected to the grid. There will be a transitional period for existing systems until then.

  • Digital interface: EEBUS is the standard for secure, manufacturer-independent communication.

 

§9 EEG – Technical requirements for generation systems

  • From March 2025: Generation systems from 2 kW must be controllable (§9 EEG; amendment to MsbG; Solar Peak Act).

  • From May 2025: VDE/FFN has published the technical requirements for controlling generation systems.
  • Manage feed-in: The grid operator must be able to reduce the feed-in power or switch it off temporarily if grid bottlenecks occur.
  • Grid compatibility: The system must fulfil the minimum technical requirements for ensuring grid stability, e.g. frequency and voltage stability, reactive power provision, and compatibility with communication protocols such as EEBUS, Modbus SunSpec or similar.
  • Obligation to equip with measuring devices: Suitable metering systems (e.g. smart meters) are mandatory for determining and controlling the feed-in.

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