Management of Injection Capacity in the National Public Grid - Complementary Regime | Decree-Law No. 100/2026, of 22 May

Management of Injection Capacity in the National Public Grid - Complementary Regime | Decree-Law No. 100/2026, of 22 May

May 2026
Management of Injection Capacity in the National Public Grid - Complementary Regime | Decree-Law No. 100/2026, of 22 May

BACKGROUND

Decree-Law No. 100/2026, of 22 May ("Decree-Law 100/2026"), creates a complementary regime to Decree-Law No. 15/2022, of 14 January, regulating the dynamic management of injection capacity in the Public Service Electricity Grid (RESP) after the issuance of the Capacity Reserve Title (TRC).

It enters into force on 23 May 2026 and remains in effect until 30 June 2027 (temporary regime).

Decree-Law No. 15/2022, which establishes the legal framework for the National Electricity System, sets out the principles and general rules for the production, transport, distribution and commercialization of electricity, as well as access to public service electricity grids. However, the practical application of this regime revealed limitations in terms of flexibility, optimization and reconfiguration of connection capacity already allocated during the execution of renewable energy projects.

The purpose of Decree-Law 100/2026 is therefore the creation of a complementary and specialized legal regime that allows the optimization and reconfiguration of connection capacity allocated under Decree-Law No. 15/2022, ensuring legal certainty, predictability and technical efficiency, and strengthening institutional coordination between DGEG and grid operators.

The procedural rules will be further detailed by ministerial order of the government member responsible for the energy sector.

 

Contacts

May 2026
Management of Injection Capacity in the National Public Grid - Complementary Regime | Decree-Law No. 100/2026, of 22 May

Scope of Application

The new regime applies to all TRCs already issued, whether obtained through the modalities of Article 18(2) of DL 15/2022 or under equivalent prior legislation. It is therefore a decree of cross-cutting scope covering the entire universe of holders with reserved capacity in the RESP.

The degree of flexibility granted by the decree varies, however, depending on the route through which the TRC was originally allocated.

  • Holders of TRC through general access now have new rules regarding aggregation, waiver, technology change e hybridization.
  • Holders of TRC through agreement with the grid operator benefit from the broadest spectrum of mechanisms: cision , aggregation, exchange, release, hybridization, partial reduction and change of interconnection point.
  • Holders of TRC through competitive procedure only take advantage of the mechanisms relating to hybridization. There is, however, a particularity for projects allocated under Order No. 11740-B/2021 (offshore floating solar): these may also request authorization from DGEG to install the power generation center onshore, subject to a binding opinion from the grid operator.

In any case, the decree establishes two absolute limits that apply to all operations: it is prohibited to increase the total allocated injection capacity and no extension of TRC validity periods is permitted.

Mechanisms

RELEVANT DEADLINES

  • General deadline for submission of request: 60 days from the entry into force of Decree-Law 100/2026, except for special deadlines.
  • Grid operator opinion: 90 days for issuance of binding opinions.
  • DGEG decision: 10 days from receipt of the grid operator's opinion, except for waiver decisions: 30 days.

SOME CONSIDERATIONS

The entry into force of Decree-Law 100/2026 requires a swift response from TRC holders and applicants with pending agreement requests. Several of the mechanisms provided for in the decree are subject to short and peremptory deadlines, non-compliance with which may result in the definitive loss of rights or the expiry of positions relating to agreements with the grid operator.

In particular, holders wishing to waive their TRC with full refund of the guarantee have only 30 days from the entry into force of the decree to submit the respective request — after that period, the refund is reduced to 80%.

Similarly, applicants with pending agreement requests who wish to benefit from capacity released through release must formalize the allocation request with DGEG within 60 days, under penalty of expiry of the pending agreement request.

For TRC holders under the agreement with the grid operator modality, the decree opens a broad range of restructuring options — from to change of interconnection point — which may justify a strategic reassessment of the project portfolio, particularly where there are licensing delays or changes in market conditions that make the original configuration less viable.

For those with pending agreement requests not yet subject to grid study, the release of capacity represents a potentially faster route of access to the RESP. However, particular attention must be paid to the 60-day deadline for requesting capacity allocation, as its expiry without a request determines the full expiry of the agreement request.

Grid operators, in turn, will see their obligations regarding the issuance of binding opinions and the submission of agreement proposals intensified, within a framework of strengthened coordination with DGEG.

It should also be noted that the decree allows the accumulation of requests in a single application, provided they are connected, in which case DGEG issues a single decision.

It is also important to bear in mind that the decree is not entirely self-executing: the procedural rules, forms and processing workflows will be defined by ministerial order of the government member responsible for the energy sector, which has not yet been published. Nevertheless, the substantive deadlines run from the entry into force of the decree-law, which requires holders to prepare documentation in advance and assess their options even before the publication of that ministerial order.

Finally, the limited duration of the decree — until 30 June 2027 — reinforces the urgency in decision-making, since the mechanisms provided therein were approved only for a transitional period and may no longer be available at a later stage.

 

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