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On August 5, 2025, ARERA published Delibera 385/2025/R/EEL, introducing new requirements for operators of distributed generation plants (photovoltaic and wind).
Under this resolution, all existing and new photovoltaic and wind plants with a nominal power of 100 kW or greater connected to the medium-voltage grid must be equipped with a Central Plant Controller (CCI) that supports the “active power limitation on external DSO command” functionality (PF2).
ARERA’s main objectives with this resolution include:
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Improving the effectiveness of generation reduction procedures in emergency situations.
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Introducing more reliable and faster communication and control systems.
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Increasing real-time visibility of medium-voltage connected plants.
Key changes introduced include:
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Abolition of the GDPRO category: grid operators can no longer rely on manual inverter power reduction performed by the manufacturer at the distributor’s request.
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Mandatory installation of a CCI for all plants ≥ 100 kW: this device, already referenced in CEI 0-16 standards, allows the plant to behave as an “equivalent generator” with improved communication and coordination.
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Mandatory PF2 functionality: all plants must be capable of limiting active power in response to external commands from the distributor or Terna.
On December 23, 2025, ARERA issued Delibera 564/2025, which updated the implementation deadlines for these compliance requirements while confirming the technical obligations.
Revised PF2 compliance deadlines:
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Existing ≥ 1 MW: December 31, 2026
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Existing ≥ 500 kW and < 1 MW: December 31, 2027
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Existing ≥ 100 kW and < 500 kW: March 31, 2028
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New ≥ 100 kW: At the date of commissioning
New fixed contributions:
For existing plants, fixed contributions are available if upgrades are completed within specified windows, with amounts depending on size and timing.
New Economic Contributions Following ARERA Resolution 564/2025 (December 23, 2025)
The cost of compliance remains entirely borne by the producer.
Flat-rate contributions are provided only for existing plants, subject to specific power ranges and compliance deadlines.
Flat-Rate Contributions for Existing Plants
| Plant Size | Flat-Rate Contribution |
|---|---|
| Existing ≥ 1 MW | Not applicable |
| Existing ≥ 500 kW and < 1 MW | €10,000 if compliance is completed by December 31, 2026 |
| €8,000 if compliance is completed by February 28, 2027 | |
| €4,000 if compliance is completed by May 31, 2027 | |
| €0 if compliance is completed after May 31, 2027 | |
| Existing ≥ 100 kW and < 500 kW | €7,500 if compliance is completed by January 31, 2027 |
| €6,000 if compliance is completed by March 31, 2027 | |
| €3,000 if compliance is completed by June 30, 2027 | |
| €0 if compliance is completed after June 30, 2027 |
Libra CCI UPS – Electrex’s Plug-and-Play Solution
Libra CCI UPS is Electrex’s integrated solution for production plant monitoring compliant with CEI 0-16 (Annexes O-T) in line with ARERA Resolutions 540/2021 and the subsequent 385/2025/R/EEL requirements. It fulfills the obligation for photovoltaic and wind plants ≥ 100 kW to be equipped with a Central Plant Controller (CCI) that supports the PF2 functionality for active power limitation on DSO command.
Key Features of Libra CCI UPS
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Measurement Accuracy: Built-in energy analyzer with accuracy class ≤ 0.2 as required by CEI 0-16:2025-04 (Annex O, point O.13.2.1).
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Complete Plug-and-Play Solution: Collects plant data and securely transmits it to the grid operator (DSO). It supports monitoring and control of electrical loads, renewable production, other energy vectors, and environmental parameters.
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Mandatory and Optional Functions:
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Mandatory: PF2 active power limitation and P/Q data exchange with the DSO.
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Optional: Functions related to participation in dispatching services markets.
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Expandable Supervision Platform: Can serve as the system head or starting point for more complex supervisory systems by integrating with other Electrex devices.
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Synchronous Logging & Web Interface: Built-in clock and memory enable synchronous recording of energy and environmental data. An integrated web server allows instant measurement views and historical data graphs.
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Battery-Backed UPS: DC UPS ensures continuous power supply for measurement systems, which is especially useful when automated energy management or alarm functions are active.
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Power Quality Monitoring: Detects and logs events per EN 50160 and EN 61000-4-30 Class S, including spikes, sags, interruptions, and harmonics, with graphical event detail and selectable measurement campaigns.
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I/O Expandability: Five opto-isolated digital inputs and three relay outputs are included; additional I/O modules can be added as required.
Libra CCI UPS is designed not only to meet regulatory requirements but also to support advanced energy monitoring and automation applications, making it a complete solution for modern distributed generation plants.
Contact me to schedule a call! I will be glad to answer any questions you may have.
About us
Since 1993 Electrex designs, develops, manufactures and markets, Made in Italy, instruments and software for energy management and control.
The Electrex solutions are used in the Energy Efficiency and Energy Automation applications, for the industrial, commercial, public, civil, and renewable energy sectors allowing a rapid return on investment.
The solutions provided up to now allow the management of over 530,000 measuring points and more than 960,000 points are controlled via Energy Automation applications.
Electrex, one of the first companies to operate in these sectors, has acquired over the years a considerable experience and competence that few other companies can claim to have. With over 40% of the staff dedicated to R & D, we demonstrate our strong commitment to innovation and continuous improvement in order to anticipate the needs of our customers.
