Inside the proposed school solar PPA: the agreement behind the panels

Start with the transaction

The visible part of a solar project is the equipment. The less visible part determines how the school benefits: the electricity purchase agreement, the rights over the roof and the allocation of responsibilities through time. A leader assessing a PPA needs to see those elements together. A low introductory price alone cannot explain the quality of the arrangement.

The August model described by DfE paired a PPA with a roof-space lease. Among its stated aims were payment for electricity consumed and no minimum purchase commitment. ^[engagement] Those are features of the proposal described in the engagement notice. They should not be treated as a guarantee about every future approved document or an offer already available to an individual school.

The opportunity is nevertheless clear. Investment in a suitable school roof could be supported by the value of the electricity the school can use. The agreement makes that opportunity legible to the parties providing funds and delivering the system. For the school, it should make the expected benefits and obligations equally legible.

Who owns what: and why it matters

Ownership affects more than the balance sheet. It helps determine who maintains the panels, who monitors performance, who deals with a breakdown and what happens at the end of the arrangement. The roof remains part of a wider educational estate, potentially subject to repair, expansion or reorganisation. The equipment therefore needs a defined relationship with the building and its future use.

Leaders should map the parties rather than assume one familiar company name covers every role. The funder, asset owner, installer, operator and contracting entity may have different responsibilities. The school needs to know which party it relies on for each obligation, and how those obligations continue if ownership or delivery arrangements change.

A simple responsibility schedule is useful. List design, permissions, construction, monitoring, routine maintenance, roof access, equipment failure, insurance and removal. Identify the responsible party and the evidence that the obligation is enforceable. This turns a long contract into a set of operational questions that staff and trustees can review.

Buying electricity in real school hours

Solar generation and school electricity use do not automatically coincide. A roof can generate on a sunny weekend while teaching spaces are empty. A school can need electricity on a dark winter morning when output is low. The value of onsite generation depends on that overlap, not only the annual production estimate.

This is why consumption data matters. An annual bill total can identify scale, but interval data gives a stronger basis for design. It helps test how much electricity will be used onsite, how much may be exported and how the project interacts with holidays, lettings and any planned change in building use. DfE's energy-efficiency guidance encourages understanding consumption and projected usage. ^[efficiency]

The school should then ask exactly what it pays for. Is the proposed payment based on generation, consumption or another definition? Who receives export revenue? What happens when meters disagree or communications fail? These answers need to be consistent across the technical design, pricing proposal and legal documents.

A price is a structure, not just a number

A quoted pence-per-kilowatt-hour rate becomes meaningful only with its conditions. Leaders should ask whether it is fixed, indexed or subject to another adjustment; what the base year is; which index is used; and whether a cap or floor applies. They should also identify any charges outside the headline electricity rate.

The comparison with grid electricity needs equal care. Some costs reduce when a school imports less power; others may remain. A proposal should identify the avoidable unit cost rather than automatically compare the PPA price with the whole bill divided by consumption. Tax and charging treatment should be checked on a consistent basis, with professional input where needed.

A strong financial paper shows several possible futures. If grid electricity becomes cheaper, does the arrangement still offer acceptable value? If consumption falls after efficiency works, what happens to the benefit? If the PPA price escalates faster than the avoided cost, when does the margin narrow? These tests help trustees understand resilience rather than approve a single optimistic line.

Roof rights through a changing estate

The lease or other site-rights arrangement gives the project access to a school asset. That must be reconciled with maintenance, safeguarding, operational access and future building plans. The school needs a practical process for planned repairs and urgent work, including who pays for temporary removal or reinstatement of equipment where relevant.

A long-term agreement also needs to account for institutional change. Ask what happens on trust transfer, site closure, disposal, expansion or a change of use. The point is not to assume these events will occur. It is to understand whether the agreement remains workable if they do, and whether the responsible body can retain the flexibility its estate requires.

Legal and technical review serve different purposes here. A lawyer can examine rights and obligations; a competent survey can assess the building and equipment. Financial review can test value for money. None substitutes for the others. Bringing them together early can avoid a promising project being delayed by a problem that should have been identified before a detailed offer.

What leaders can do before final templates

Draft-model coverage should help schools become informed counterparties. It should not invite them to sign an unapproved substitute. The practical output is a document map: electricity terms, roof rights, design assumptions, permissions, maintenance schedule and evidence of value. Each item has an owner and a review point.

When final approved materials are published, compare their wording with the school's questions rather than assume standardisation answers every site-specific issue. Standard terms can reduce duplication and improve consistency. The roof, consumption pattern and future estate plan still belong to the institution.

That is the positive case for preparation. A school that understands the transaction can assess it faster and with greater confidence. It can recognise a genuinely useful opportunity, identify where specialist advice adds value and explain the decision to its board. The next chapter considers what remained unresolved after engagement, while the economics feature works through an illustrative model with visible assumptions.

Before commissioning a detailed proposal, agree the information format the school expects. Ask reviewers to show the link between electricity pricing, onsite use and roof obligations in one short explanation. This helps trustees see whether the different documents describe the same arrangement, and prevents a technical assumption quietly becoming an unsupported financial or legal conclusion.