Renewable Energy PPPs UK: Guide for 2025

Overview

A public-private partnership in renewable energy is a long-term contractual relationship between a public body (central government, a devolved administration, a local council, or a public agency) and one or more private sector parties. The private side typically puts up the capital, builds the asset, and takes on much of the operational risk.

The public side usually provides something the private sector cannot easily get on its own: planning support, land access, a guaranteed route to market, regulatory backing, or a long-term purchase commitment for the electricity generated. The point of the arrangement is to share the work and the risk in a way that neither side could achieve alone.

Public money goes further because private capital is doing the heavy lifting. Private investors get the comfort of a long-term revenue stream backed, in some form, by the state. PPPs are used across offshore wind, onshore wind, solar, hydro, bioenergy, and increasingly in grid-scale storage and hydrogen projects.

Key steps

1. Identify the project type and public sector partner. Work out which renewable technology the project involves and which public body is on the other side of the table. A local authority joint venture for a solar rooftop scheme looks very different from a Crown Estate seabed lease for offshore wind. The identity of the public partner shapes the procurement route, the approvals needed, and the pace at which decisions get made.
2. Understand the commercial structure. Decide whether the arrangement will be a build-operate-transfer model, a concession, a joint venture company, a long-term power purchase agreement, or a hybrid. Each has different implications for who owns the asset, who runs it, who takes the revenue, and what happens at the end of the contract term. The structure chosen will drive the tax, accounting, and financing treatment for years to come.
3. Work through the procurement and state aid position. Public bodies are usually bound by procurement rules and subsidy control obligations. Check whether a competitive tender is required, whether the subsidy control regime applies, and whether the arrangement needs to be notified or assessed under the Subsidy Control Act 2022. Getting this wrong can unwind a deal later, so it should be confirmed early.
4. Negotiate risk allocation carefully. PPPs live or die on how risk is shared. Construction risk, planning risk, grid connection delays, price volatility, technology performance, and decommissioning obligations all need to sit with whoever is best placed to manage them. The contract should spell out clearly who carries what, what happens if something goes wrong, and how disputes will be handled.
5. Plan for the full project lifecycle. Renewable projects often run for 25 to 40 years. Think through refinancing windows, revenue support mechanisms ending, maintenance and repowering, changes in law, and eventual decommissioning. Good PPPs build in review points and mechanisms to adjust terms as circumstances shift, rather than trying to lock everything down on day one.

Common questions