Supervisory Activities

Supervisory Activities

ERSE carries out surveillance and inspection activities on companies subject to its regulation and oversight - namely network operators and other regulated infrastructures and energy suppliers - as regards matters falling within its powers.

These actions may be triggered, regardless of prior appointment, for the purpose of investigating complaints that have been brought to the attention of this Authority.

Checks and inspections are a way of monitoring the practices followed by regulated operators, allowing ERSE to fulfil, among others, the following objectives:

To ensure compliance with the legal and regulatory provisions applicable to its regulated operators
To ensure compliance with ERSE’s instructions and decisions
To better support the consolidation of regulated tariffs’ allowed revenues
To check compliance, on the part of agents in regulated sectors, with public service obligations
To monitor fulfilment of quality of service standards
To act following consumer complaints

The monitoring of compliance with rules subject to ERSE’s surveillance is carried out by ERSE’s own means or by duly accredited qualified entities with high levels of quality and independence criteria, and comprises activities carried out on site or off site. ERSE collects data and other elements from operators; it promotes visits to sites; carries out technical tests; programmed or extraordinary audits and inspections, many of which support the definition of allowed revenues through the application of regulated tariffs. Some of the inspections conducted involve sensitive and confidential information.

2025

Sector	Type	Object	Company
	Inspection	Mistery client action to test the scenario of technical assistance following the use of telephone support to report faults	Distribution System Operators
	Audit	Verification of regulatory dispositions under the Quality of Service Regulation	E-Redes - Distribuição de Eletricidade, S.A.

2024

Sector	Type	Object	Company
	Audit	Analysis of Turbogás' expenses in view of the extension of its operation under the PPA. Audit undertaken in collaboration with ENSE	Turbogás, S.A.
	Audit	Follow-up of recommendations resulting from the audit of the application of the incentive for the economic rationalization of investments (IREI)	REN
	Audit	Procedures for recognizing/capitalizing the costs of structural, management and financial charges in the costs of Assets	E-Redes
	Audit	Procedures for recognizing/capitalizing the costs of structural, management and financial charges in the costs of Assets	REN
	Audit	Analysis of the company's operation and organization	Enondas, Energia das Ondas, S.A.
	Inspeçtion	Mistery client action in the telephone service of suppliers to assess the commercial quality of the service provided to customers. Tested the scenario of switching electricity supplier through telephone service	Suppliers
	Audit	Analysis of the OLMCA activity	ADENE - Agência para a Energia, enquanto Operador Logístico de Mudança de Comercializador e Agregador
	Audit	Evolution of costs for REN Trading's representation in arbitration panels provided for in the PPA	REN Trading, S.A.
	Inspection	In-person service (quality of service, complaints book)	Endesa
	Audit	Continuity of Supply
	Inspeçtion	Mistery client action to 3 lines of telephone service of suppliers to assess the commercial quality of the service provided to customers. Tested the scenario of switching electricity supplier through telephone service	Suppliers
	Inspeçtion	Mistery client action to 9 distribution system operators to assess the commercial quality of the service provided to customers. Tested the combined visit scenario as part of technical assistance to a gas installation	Distribution System Operators
	Inspection	In-person service (quality of service, complaints book)	Goldenergy
	Audit	Assessment of Wholesale Supplier of Last Resort operation costs	Transgás
	Inspection	Inspection of compliance with the Energy Consumption Efficiency Promotion Plan Regulation	APED - Portuguese Association of Distribution Companies
	Inspection	Inspection action on compliance with the obligations set out in the Smart Grid Services Code for installations integrated in 2022	E-Redes - Distribuição de Eletricidade, S.A.

2023

Sector	Type	Object	Company
	Inspection	Inspection action on domestic invoices from electricity suppliers	Market suppliers
	Inspeçtion	Mistery client action to sixteen in-person stores and four telephone service of eletricity and natural gas suppliers to assess the commercial quality of the service provided to customers. Two scenarios were tested: filing a complaint by telephone and requesting a written response and request of a contract proposal.	Suppliers
	Fiscalization	In-person service (quality of service, complaints book)	EDP Comercial
	Fiscalization	In-person service (quality of service, complaints book)	Petrogal (Galp)
	Audit	Continuity of Supply	E-Redes - Distribuição de Eletricidade, S.A.
	Audit	Continuity of Supply	EDA - Electricidade dos Açores, S.A.
	Inspection	Conclusions and recommendations follow up - Low voltage assets audit	E-Redes - Distribuição de Eletricidade, S.A.
C	Inspection	Conclusions and recommendations follow up - Intragroup operations of Galp/Floene group audit	GALP/Floene
	Inspection	Reporting of investments in distribution	REN Portgás Distribuição, S.A.
	Inspection	Conclusions and recommendations follow up - Investments in information systems and costs arising from the new activities undertaken by SU Eletricidade audit	S.U. Eletricidade, S.A.
	Audit	Assessment and critical evaluation of OPEX and CAPEX allocation by voltage levels rules (HV/MV and LV)	E-Redes - Distribuição de Eletricidade, S.A.
	Inspection	Intra-group operations of the EDA Group, nature of maintenance operating costs of production equipment and operations with the company Graciólica	EDA,S.A.

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