Grid connection timeline in Italy: what drives the days to connection

Why there is no standard connection time

Investors often ask how long it takes to connect a solar plant in Italy. The honest answer is that the solar connection time is project-specific. Two plants of similar size in the same region can face very different waits, because the timeline is driven by the works the grid operator has to carry out, by the authorisation of those works and by the operator's own planning. Any figure quoted without reference to a specific connection file should be treated with caution.

What can be done is to understand the factors and to read the documents that describe them, starting from the STMG and the TICA rules.

Factors that determine the grid connection timeline

Scope of the network works

A connection that only requires a short line to an existing substation is different from one that needs a new substation, a new line or the reinforcement of existing assets. The larger the network works, the longer the path to energisation tends to be.

Voltage level and grid operator

Connections to the high voltage transmission grid are handled by Terna, those at medium and low voltage by distributors such as e-distribuzione. Each operator has its own processes, and higher voltage connections usually involve more complex works.

Authorisation of the connection works

Network works may be authorised together with the plant or through a separate procedure. If they are not yet authorised, the timeline includes that step too. See PAS and AU solar permitting.

Shared infrastructure and saturation

Where several producers share a substation or a line, progress can depend on works coordinated among them. In areas where the grid is saturated, reinforcements planned by the operator may be needed before new capacity can be connected.

The operator's construction schedule

Once everything is authorised, the operator plans its own works. Site access, procurement of equipment and coordination with other projects all affect the date.

The producer's side

User works, testing and the documents required for energisation are the producer's responsibility. Delays on this side are within the owner's control and should be checked as well.

How to read the days to connection field

Every project registered in the Pipeline.Solar pipeline carries a field called estimated days to connection. It is an estimate provided by the project owner on the basis of the connection file, not a commitment by the grid operator and not a figure verified by Pipeline.Solar. Its purpose is to allow a first comparison between projects before the NDA.

When reading it, consider:

• the reference date from which the estimate is counted;
• whether network works are authorised, under way or still to be designed;
• whether the estimate relies on shared works with other producers;
• the consistency between the estimate and the documents in the data room.

Connection timing by project stage

The weight of connection timing changes along the lifecycle. For a greenfield project it is a forecast with wide uncertainty. For an RTB project it shapes the construction schedule and the financing plan. For a brownfield plant, already built and waiting for energisation, it is often the main open variable, which is why investors look closely at the progress of the operator's works.

Connection timing also feeds into valuation: a later energisation date shifts revenues and may affect access to support schemes or contracts. See solar project valuation in Italy.

Questions to ask the seller

1. Which works are required on the grid side, and who carries them out?
2. Are those works authorised, and under which procedure?
3. Has the operator communicated a schedule, and in which document?
4. Are there other producers on the same connection, and what is their status?
5. What remains to be done on the user side before energisation?

The answers form part of the investor's due diligence, supported by the documents made available after the NDA.

Using connection data in your search

Connection data is one of the quickest ways to narrow a long list of opportunities. Investors who need predictable energisation, for example to meet the terms of a PPA or a financing plan, often weight the days to connection field as heavily as the permit status. Others accept a longer horizon in exchange for a project at an earlier stage or with better land terms. Being explicit about this preference during the introductory call helps the staff send only teasers that are relevant.

On Pipeline.Solar you set stages, regions and the capacity range of the single plant; the staff sends a teaser only when a project fits, with the connection fields included. To receive teasers, request investor access or write on WhatsApp. Opportunities depend on the projects available at the time.