Solar for Multi-Academy Trusts: A Procurement & Rollout Guide

Why trusts should buy solar as a programme, not a project

For a single school, solar is a capital decision. For a multi-academy trust (MAT), it is an estates strategy — and the trusts that treat it that way get materially better outcomes than those that let each school buy piecemeal. Procuring across the whole estate unlocks economies of scale on price, lets a single funding application cover every site, and gives the trust board one coherent net zero story to tell rather than a scatter of unconnected installs. This guide is written for the estates director, CFO or operations lead who has to build that programme and take it through the trustees.

The core insight is simple: everything gets cheaper, cleaner and easier at trust scale — procurement, funding, delivery and monitoring. Below is how to run each of those four, plus the ESFA governance you must not skip.

The trust-level business case

A per-school business case asks “does solar pay back on this roof?” A trust-level case asks a bigger and more powerful question: “across our whole estate, what is the lowest-risk way to cut electricity cost and evidence net zero progress to the board?” Framed that way, solar usually wins on several fronts at once:

• Cost: trusts commonly run 3–30 schools. Solar at trust scale falls toward the lowest per-kW rates — often below £800/kW — because design, procurement, mobilisation and grid liaison spread across many sites instead of being paid for once per school.
• Financial ratios: a portfolio approach lets the CFO manage the impact on the trust’s reserves and in-year position across sites, rather than loading one school’s balance sheet.
• Board reporting: solar gives trustees a clear, auditable line of net zero progress against the DfE Sustainability and Climate Change Strategy, which targets net zero estates by 2050 with milestones at 2030 and 2035. That is exactly the evidence boards are increasingly asked to produce.

The starting point is a single feasibility study across the estate. Several trusts have used one study to scope every school at once — ranking sites by roof suitability, electrical headroom and demand — so the board sees the whole opportunity, then decides the phasing. That is far more efficient than commissioning a survey per school as each headteacher happens to ask.

Funding the whole programme with one application

This is where trust-scale procurement pays off most. A single Salix Decarbonisation Loan application can fund a programme spanning multiple schools, not just one site — interest-free, repaid from the combined energy savings across the estate. Because Salix is not competitive, a trust can plan its rollout with funding certainty. Alternatively, a single competitive PSDS Phase 4 bid can seek capital grant across the estate, strongest where solar is paired with heat decarbonisation on some sites.

The practical advantages of one application over many:

• One savings model, one submission — we build the auditable energy-savings calculation across all sites, and the trust signs a single form rather than chasing a dozen.
• Portfolio risk management — a strong site can carry a marginal one within the same programme, so schools that wouldn’t quite justify a standalone project still get panels.
• Cleaner governance — the trustees approve one programme with one funding line, not a rolling series of separate capital decisions.

For academies, the Condition Improvement Fund (CIF) is also available per eligible site, which can complement a trust Salix programme where individual schools have roofs that need refurbishment anyway. Our Salix vs PSDS vs CIF guide sets out how to combine them.

Phased delivery across the estate

You cannot install on twenty roofs at once, and you would not want to. The right pattern is phased delivery aligned to school-holiday windows, because school solar’s hard constraint is access: the noisy, disruptive work — scaffold, roof access, panel transport — has to happen when pupils aren’t on site, and secondary schools also exclude the May–June exam season.

A typical trust rollout therefore looks like:

• Phase 1 — the highest-value, most straightforward sites (large flat roofs, three-phase supply, no listed-building complications), delivered in the first summer.
• Phase 2 — sites needing more preparation (structural strengthening, DNO upgrades, Listed Building Consent), scheduled once the surveys and consents are in.
• Ongoing — smaller primaries and any single-phase sites where an electrical upgrade or a smaller system is the right call.

Every crew entering any trust site is DBS-cleared (Enhanced + Children’s Barred List) and works to KCSIE 2025 safeguarding standards, inducted by each school’s SBM. Several MATs have written our induction protocol into their own estates standards, so the same safeguarding regime applies consistently across every school in the trust.

Central monitoring across every site

A scattered set of installs leaves an estates director with a scattered set of dashboards. A trust programme should deliver central monitoring — one interface showing live generation, lifetime kWh and CO₂ saved across every school. That matters for three reasons: it lets the estates team spot an underperforming array anywhere in the estate, it feeds the board’s net zero reporting directly, and it powers curriculum use at every school from the same data. A trust can compare sites, publish a combined generation figure in its annual report, and give every school a live-generation display fed from the same platform — turning the whole estate into a teaching resource, not just an energy asset.

ESFA governance and the Academy Trust Handbook

Trust solar sits inside a governance framework maintained schools don’t have, and skipping it causes problems later. The key points:

• ESFA Academy Trust Handbook applies to all capital spend. Capital projects above £100,000 often require ESFA notification, and a trust-wide programme will usually cross that threshold, so build the notification into your timeline from the start.
• Trustee approval — a programme of this scale is a members/trustees decision, not a delegated one. Present it as an estates-strategy programme with a funding line, not a series of ad-hoc buys.
• Whole-trust risk register — update it to reflect the programme (delivery, roof, contractor and safeguarding risks), which trustees will expect to see.
• Diocesan approval — if the trust includes voluntary aided or church schools, the relevant diocese may need to approve material works to those buildings.

Getting the governance right early is what keeps a rollout on schedule. A programme that stalls waiting for an ESFA notification or a diocesan sign-off it should have started months earlier is the most common avoidable delay.

A realistic illustrative rollout

As an illustrative composite, not a named client: a four-school MAT secondary in the East Midlands saw electricity costs rise from around £85,000 to £170,000 across two years against constrained capital and a board-level net zero commitment. The trust started with one school — a 118 kW system on a 950 sqm flat membrane roof — funded 100% via Salix and cash-flow positive in year one, with a live-generation display in the entrance. It featured in the trust’s annual report, and phase two across the remaining three schools was approved at the next trustees’ meeting. The figures are illustrative and will differ on your estate, but the pattern — prove it on one site, fund it centrally, roll it out phased — is the one that works.

Start with an estate-wide feasibility

The single best move a trust can make is to commission one feasibility study across the whole estate before committing to anything. It ranks your sites, sizes each system from half-hourly meter data, models the funded position, and gives the board a phased programme to approve in one decision. See our multi-academy trusts page for the trust-specific detail, the cost guide for the numbers, and the grants and funding page for the funding routes.

When your trust is ready to scope its estate, request a free feasibility and we will map every site, model a single funding application, and hand your board a phased rollout it can approve — with the ESFA notifications and safeguarding regime built in from the start.