Grid connection agreements explained

A grid connection agreement is the contract between a project owner and the network operator that sets out the terms on which a solar farm is allowed to connect to and use the electricity network. It records the connection point, the capacity the project may export, the date by which it will connect, the works required and the money and obligations that sit behind all of it. For a solar project, the connection agreement is the document that turns a place in the queue into a legal right to connect, so it is one of the first things a serious buyer will ask to see.

We broker solar farms, ready-to-build projects and grid connections, so we read these agreements often and know which terms decide a project's value. This guide explains what a connection offer and a connection agreement contain, what acceptance commits you to, what Transmission Entry Capacity means in the contract, how securities, milestones and liabilities work, whether a connection can be sold or transferred, and how a connection can be modified or terminated. We are not a lender, a solicitor or a financial adviser, and nothing here is legal advice or a promise about returns. It is a plain explanation of the contract that sits at the centre of every solar deal.

What is a grid connection agreement?

A grid connection agreement is a contract between the owner of a project and the relevant network operator, either NESO and the transmission owner for transmission connections or a Distribution Network Operator for distribution connections, that governs how the project connects to and uses the network. It is the legal instrument that gives a solar farm the right to export power at an agreed capacity and connection point, in exchange for meeting the obligations the agreement sets out. Without it, a project has no enforceable right to connect, whatever its place in the queue might suggest.

The agreement is site specific and project specific. It names the connection point, fixes the Transmission Entry Capacity or equivalent distribution capacity, states the contracted connection date and lists the works that have to be carried out and who pays for them. It also sets out the securities the project must post, the milestones it must meet and the liabilities it accepts if it does not. In short, it converts the technical outcome of the connection study into a set of binding commitments on both sides.

It helps to see the agreement as the endpoint of a process that runs from application, through a connection study, to a connection offer, to acceptance, and finally to energisation when the project actually connects and begins exporting. The connection agreement is what binds that whole path together. When we assess a solar project, the connection agreement, and the specific terms it contains, tells us far more about the asset than any summary description, because it is where the real obligations and rights are written down.

What does a connection offer contain?

A connection offer is the document the network operator issues setting out the terms on which it will connect a project, and it is the basis for the connection agreement that follows once accepted. The offer specifies the connection point on the network, the capacity the project may export in megawatts, and the contracted connection date. These three facts define the commercial shape of the project, because together they say how much power it can sell and when it can start.

The offer also details the works required to make the connection possible and how their cost is allocated. Some works are on the project's own side of the connection, and some are reinforcement to the wider network that the connection triggers. The offer sets out who pays for what, which can be a significant figure and a significant part of a project's economics. Alongside the works, the offer states the securities the project must provide and the milestones it must hit to keep the offer alive.

An offer has a life of its own before it becomes an agreement. It is made on terms and typically has to be accepted within a defined window, after which it may lapse. Reading an offer carefully matters, because the connection point, the capacity and the date it fixes are the very things that determine whether the project fits what a buyer wants. When a buyer registers a mandate with us describing the capacity and connection profile they are looking for, the connection offer is the document we check a candidate project against.

What does accepting a connection offer commit you to?

Accepting a connection offer is the step that turns a set of proposed terms into a binding connection agreement, and it commits the project to the obligations the offer contains. Acceptance is not a formality. By accepting, the project takes on the duty to provide the securities specified, to meet the milestones on the timetable set out, to fund its share of the connection works and to accept the liabilities that apply if it fails to perform. It is the moment the project becomes contractually responsible for delivering against the connection.

Acceptance usually has to happen within a defined period after the offer is made, and missing that window can mean the offer lapses and the project loses the terms on offer. This is why acceptance is a decision to take seriously rather than to defer. Once accepted, the project is on the network operator's timetable, and the clock on its milestones and securities starts to run. A project that accepts without being ready to meet those commitments exposes itself to the liabilities that follow a missed milestone.

For a buyer, whether an offer has been accepted is a material fact about a project. An accepted offer, backed by the securities and milestones the agreement requires, is a firmer thing than an unaccepted offer that could still lapse. It is one of the reasons a consented site with an accepted connection offer is the kind of asset that trades, and one of the first points we clarify when we look at a project on behalf of a buyer or a seller.

How do securities, milestones and liabilities work?

Securities, milestones and liabilities are the mechanisms that hold a project to its commitments under a connection agreement, and together they are how the reformed system keeps the queue honest. Securities are financial commitments the project posts to back its place, so that a slot has real money behind it rather than being a costless reservation. Milestones are the dated obligations the project must meet, such as reaching defined stages of land control, planning and construction, that evidence continued progress towards connection.

Liabilities are the consequences of failing to meet those obligations. If a project misses a milestone or pulls out, it can face charges or forfeit securities, and it can lose its connection date and its place in the queue. This is deliberate. The whole point of attaching securities and milestones to a connection is to ensure that a project holding a valuable connection date is genuinely committed to using it, and to free up the slot if it is not. It is the contractual expression of the first ready, first connected principle.

For anyone holding or buying a project, these mechanisms cut both ways. They are what make a confirmed connection date credible, because a project that has posted securities and is meeting milestones is demonstrably serious. But they are also a live obligation that continues after any sale, so a buyer needs to understand what securities are posted, what milestones are coming and what happens if one is missed. When we broker a project, mapping the outstanding milestones and securities is part of describing the asset honestly.

Can a grid connection be sold or transferred?

The honest answer is that a grid connection is not sold on its own like a detached commodity. A connection attaches to a specific project and site, and it moves when the project or the site moves. You cannot lift a connection date off one scheme and sell it to another in a different location, because the connection is defined by its connection point, its capacity and the network study behind it. What can be sold is the project that holds the connection, and the connection transfers with it.

This is exactly why a consented site with an accepted connection offer is the tradeable unit in the solar market. When a buyer acquires the project, whether by buying the special purpose company that holds it or by acquiring the site and its rights, the connection agreement comes too, along with its capacity, its date, its securities and its milestones. The buyer steps into the project's shoes and takes on the connection as it stands. The connection is not the thing being detached and traded; it is part of the asset being transferred whole.

Any transfer has to respect the network operator's requirements, because the operator is a party to the connection agreement and has a legitimate interest in who holds it and whether the project remains deliverable. In practice, the connection travelling with the project is what allows a market in ready solar farms to exist at all: it means a buyer can acquire a project confident that the connection date it is paying for comes with it. When we broker a project, structuring the deal so the connection transfers cleanly with the site is central to what we do.

How can a connection be modified or terminated?

A connection agreement can be modified, but modifications are made through the network operator and can carry consequences for the project's terms. A project might seek to change its capacity, adjust its connection date or alter the works, and the operator will assess how any change affects the network and the queue. Some modifications are straightforward; others can amount to a material change that affects the project's standing, so a change that looks administrative can have commercial weight. Reading how flexible a given agreement is forms part of understanding the asset.

Termination is the more serious risk, and it can arise in two ways. A project may choose to terminate, giving up its connection, which typically means forfeiting securities and losing the date. Or the network operator may terminate where the project fails to meet its milestones or securities, which is the enforcement mechanism the reformed system relies on to clear the queue of projects that are not progressing. Either way, termination means the connection date, the scarce and valuable thing, is lost.

This modification and termination risk is why a confirmed connection date is best understood as a maintained asset rather than a permanent possession. A project keeps its date by meeting its obligations, and it can lose it by missing them or by changing the project in a way that disturbs its standing. For a buyer, understanding this risk is part of pricing the project properly, and it is one of the things we make sure is on the table when we broker a deal. We are not a lender or an adviser on that pricing, but we make certain the connection terms, including how they could change, are clearly understood by both sides.