EU Commission Draft Revised RfG and Annexes (2026)

Type: Draft Commission Delegated Regulation + Annexes 1–3 (preliminary, not adopted) + Ei news coverage Reference: Ref. Ares(2026)6819642 (08/07/2026) Date: draft published for consultation July 2026; consultation closes 25 August 2026 Title: Commission Delegated Regulation (EU) …/… establishing a network code on requirements for grid connection of generators and repealing Regulation (EU) 2016/631

Summary

The European Commission has published its draft revision of RFG — the network code on grid-connection requirements for generators — for public consultation. This is the formal Commission draft implementing the amendments ACER recommended in December 2023 (“NC RfG 2.0”), closing the comitology-status data gap previously flagged in Generator Connection Requirements › Data gaps. The Commission states the technical requirements are based on ACER’s recommendation but that lessons from the April 2025 Iberian blackout were also incorporated. Upon adoption, RfG (EU) 2016/631 will be repealed and replaced by this new act. Ei is holding off finalising its own planned revision of EIFS 2018:2 while this EU-level process runs (see Source - EIFS 2018-2 Nätanslutning av generatorer and the note below).

Key content

Electricity storage modules (ESM) — new regulated category

The draft formally defines an “electricity storage module” (ESM): a power-generating module that can inject and consume active power for energy storage behind a single connection point, including V2G EV and V2G EVSE with bidirectional functionality, but excluding pump-storage. ESMs are subject to the same requirements as power-generating modules unless otherwise justified by their specific characteristics — the formal removal of RfG Art. 3.2(d)‘s storage exclusion that the wiki’s existing NC RfG 2.0 summary anticipated.

Grid-forming capability

Article 29 (“Grid forming capability”) requires the unit to behave, at its terminals, as a voltage source (rather than a current-follower) — including synthetic inertia where required. The mandate is two-tier, not a single uniform TSO discretion “from Type A/B upward”: for Type A power park modules and most Type B modules, grid-forming only becomes mandatory once the TSO (in coordination with DSOs) has submitted a national phase-in roadmap and the regulatory authority has set a date (Art. 29(1)–(2)); but large Type B modules — those connected at 110 kV or above, or ≥10 MW connected below 110 kV to a feeder/substation with transformation to 110 kV or above — are mandated directly by Article 30(3), with no TSO roadmap or regulatory-authority decision required, and Type C and D power park modules are mandated directly via Articles 31–32 (which cross-reference Art. 29(3)–(6) and Art. 30 unconditionally). This matches and gives regulatory teeth to the grid-forming direction already tracked in Source - Svk Driftsäkerhet Augusti 2025 and Source - CONDON Nordic Position on Grid-Forming (2025).

V2G electric vehicles and EVSE — mandatory technical requirements

V2G EV and V2G EVSE are formally defined and brought into scope (recitals 5 and 33; Article 2, definitions (64)–(67)). Application timeline once the Regulation enters into force:

• 3 years for new vehicle types
• 4 years for all new vehicles placed on the market
• (For power-generating modules generally, 2 years unless otherwise specified — until then, RfG (EU) 2016/631’s existing requirements continue to apply.)

Annex III — Certification Framework for V2G EV and V2G EVSE (developed with industry stakeholders) establishes how conformity is demonstrated:

• Functional split: the EV and EVSE (AC or DC) are certified individually, based on each component’s contribution to grid-code compliance
• Conformity assessment test setups, configuration ranges, parameter sets, and acceptance criteria are based on EN 50549-10:2022, with V2G-specific adaptations
• Certification is performed by certifiers accredited under EN ISO/IEC 17065 and recognised by the national EA (European co-operation for Accreditation) affiliate, per Regulation (EC) No 765/2008
• EVSE-based compliance: the V2G EVSE manufacturer provides a country-specific compliance certificate
• EV-based compliance: for AC V2G EVs, compliance is normally demonstrated through the Whole Vehicle Type Approval (WVTA) framework; before WVTA becomes effective for this purpose, manufacturers may seek certification directly under this Annex; a Union-wide certificate covers AC V2G EVs excluded from WVTA
• Product families: certificates may extend to other products in the same family (±50% of rated power, same communication protocol/software, same grid-code-relevant control algorithm) without repeating tests — separate family definitions for AC V2G EV systems, DC V2G EVSE, and AC V2G EVSE

Annexes I and II (tables/figures) were not yet populated in this draft (“Tables and Figures to be moved here”).

RoCoF ride-through for storage

Electricity storage modules must withstand rate-of-change-of-frequency events: ±4.0 Hz/s (0.25 s) / ±2.0 Hz/s (0.5 s) / ±1.5 Hz/s (1 s) / ±1.25 Hz/s (2 s).

Swedish regulatory response

Per Ei’s own news coverage (EU-kommissionen har påbörjat revidering av RfG, 2026-07-09): Ei began its own revision of EIFS 2018:2 in 2025 and sent a remissförslag in February 2026 (coordination requirements between system operators on site-specific requirements, converting some national generally-applicable requirements into site-specific ones, and clearer cross-references to RfG articles). Because the Commission’s draft covers much of the same ground, Ei has decided not to proceed with the substantive EIFS 2018:2 changes at this stage — implementing them now risks either double regulatory change or having to re-open national rules once the new RfG is adopted. Ei will instead review EIFS 2018:2 for consequential updates (e.g. references to updated bemyndiganden, possibly a dispensation rule) once the EU-level revision is clearer, and is urging Swedish market actors to submit comments directly to the Commission’s consultation before 25 August 2026.

Relevance to wiki topics