Solar Panels for Schools: Costs, Savings and Funding

How much will your school benefit from solar panels?

If you’re thinking about solar panels for your school or college, you’re probably wondering how much they’ll save you and if there are any grants to cover the cost. The quick answer is they can cut your electricity bill by 40-60%, and for state schools there is a route that can cover the whole installation and equipment cost.

What solar for schools actually involves

A school solar system is a commercial rooftop installation. It is the same technology as a home system scaled up, with three practical differences that matter to a School Business Manager or estates lead.

First, size. Home systems are 3-5 kW. School systems start around 20 kW for a small primary school and run to several hundred kW for a large secondary school or a multi-building campus. Second, the grid connection. Anything above the small-system threshold needs formal permission from your Distribution Network Operator before it can switch on, which adds weeks to the timeline and, on constrained networks, sometimes a cost. Third, the calendar. A school’s demand and a school’s generation do not line up as neatly as a home’s, and that single fact drives most of the design decisions later in this guide.

Solar suits almost any school, but it suits some more than others. The strongest cases are buildings with high daytime electricity use, a roof in good condition with fifteen or more years of life left, and some year-round occupancy. Special schools, nurseries attached to primaries, boarding schools and any site running holiday clubs all self-consume more of what they generate, which improves the economics. A day-only primary school that empties at 3:30pm and closes for six weeks in summer can still do well, but the design has to work harder.

What solar panels cost a school in 2026

Solar is priced per kilowatt of installed capacity, and the unit price falls as the system gets bigger. These are the working ranges for UK school installs this year, in line with wider commercial solar costs:

Those figures include design, an MCS-certified installation, mounting, inverters, tier-1 panels, commissioning and a 10-year insurance-backed workmanship warranty. What a headline price does not always include is the site-specific work: scaffolding on a tricky roof, a DNO connection upgrade, roof strengthening, or asbestos survey and removal on older buildings. Two schools with identical roof areas can receive very different quotes for exactly these reasons, which is why a survey matters more than an online estimate.

How much a school actually saves

Schools buy power on non-domestic contracts at roughly 22-32p per kWh. A rooftop panel produces the same unit for a fraction of that once the system is paid off, and even during the payback years every self-consumed unit is money the school did not spend with a supplier.

Those headline figures from the Department for Education bundle solar with LED lighting, so treat them as the top of the range rather than solar alone. For solar by itself, a realistic band is roughly £3,000-£8,000 a year for a primary, £8,000-£25,000 for a secondary, and more for a large campus. The exact number depends heavily on how much power you use on site, and your array size.

There is one more thing to consider in the business case: export income. Whatever the panels generate that the school cannot use or store is sold back to the grid under the Smart Export Guarantee, at rates between 4p and 15p per kWh depending on the supplier. For a day school with no pupils over the summer, that turns the “empty building in August” problem into a small revenue stream. It is worth using a Smart Export Guarantee calculator to see what your surplus is worth before signing an export tariff.

The six funding routes, compared

This is the part that has changed most. A school no longer has to find six figures of capital to go solar. The routes below range from a full grant to a zero-capital lease, and many schools combine two, using a grant or a loan for the panels. Start with the wider picture of government grants for solar, then see which of these your school type can actually get.

1. Great British Energy Solar Partnership

The most generous route ever offered to state schools in England. Great British Energy, the state-owned clean power company, funds the full cost of the installation, including panels, inverters, mounting, electrical works and around five years of maintenance and monitoring, with no repayment. By summer 2026 around 250 schools and colleges had been fitted, with a further wave of 100 backed by up to £40 million.

The catch is eligibility and queue length. It is open to state-funded schools and colleges only, which means local authority maintained schools, academies, free schools, special schools and colleges. Independent schools and private nurseries are not eligible. The programme prioritises schools in disadvantaged areas, and places so far have been allocated in government-selected waves rather than an open application round, so register interest early.

2. Salix Finance interest-free loans

Salix is the public sector body that historically lent for energy efficiency at 0% interest, with loans repaid from the energy savings over five to eight years. Its loan scheme for schools in England is now closed to new applications. Salix’s role today is delivering the grant schemes instead, including the Public Sector Decarbonisation Scheme below.

3. Public Sector Decarbonisation Scheme (PSDS)

PSDS Phase 4 carries a total budget of £1.17 billion through 2028, administered by Salix, and can cover up to 100% of capital costs. It’s powerful but slow: the procurement is heavier than a GB Energy application, and awarded projects come with utilisation requirements. It tends to work best for larger estates and multi-academy trusts with the capacity to manage a formal public-sector process.

4. Condition Improvement Fund (CIF)

CIF is a capital bid route for eligible academies, sixth-form colleges and voluntary-aided schools. It is often used alongside solar rather than for the panels directly: if your roof needs work before it can carry panels for 15 years, a CIF bid for roof repairs can be paired with a separate solar grant or loan for the array.

5. Power Purchase Agreement (PPA)

A PPA removes capital entirely. A provider funds, owns and maintains the system for 15-25 years, and the school buys only the power it generates at a fixed, discounted rate, around 13-17p per kWh in 2026 against grid import of 22-32p. There is no upfront cost and no maintenance burden, and multi-academy trusts can sign a single multi-site agreement that a grant cannot match for speed. The trade-off is that the school does not own the panels and the lifetime saving is smaller than owning outright. A business or investor is making a profit from this.

6. Community energy schemes

A local community energy group raises money to install and own panels on the school roof, selling the school cheap power and reinvesting any surplus locally. It’s zero-capital and community-minded, but the administration and the benefit split vary a lot between schemes, which is why it’s lower in our scoring.

The term-time problem, and when a battery earns its place (sometimes)

The mismatch between when schools generate electricity from solar panels and when they use it matters because a self-consumed unit is worth far more than an exported one. If you use a unit on site you avoid paying roughly 30p for it. If you export the same unit you receive maybe 8p. That’s nearly four times the value for using your own power. Raising self-consumption is a big lever on a school’s payback and profit.

There are two answers, and a good installer models both from at least twelve months of your half-hourly meter data. The first is battery storage, typically 50-150 kWh for a school, which shifts weekend and holiday generation into term-time use and lifts self-consumption. The second is the Smart Export Guarantee, which monetises whatever you still cannot use. A battery only pays where there is enough trapped surplus to justify it, so it is a data question, not a default. Even when you model a solar battery well, it can look like a mediocre investment at today’s electricity prices. However, when you model in energy inflation, it starts to look very good.

Choosing an installer for a school project

A school install carries requirements a domestic job never faces: safeguarding, term-time safety, and a governing body that will hold the paperwork for decades. The genuine education-specialist market is small, so most schools either use one of the named specialists below or procure a strong regional commercial installer with sector oversight.

Among the installers with a real education track record, a few names come up repeatedly. Joju Solar has installed commercial solar since 2006 and delivered hundreds of schools and municipal buildings, including a large portfolio for Hampshire. Solarsense works specifically with schools and academies and offers finance options for the sector. Eden Sustainable focuses on funded and PPA-based projects for education and community sites, which suits schools that want zero upfront cost. Whichever you approach, get three comparable quotes and check the sector references yourself.

Private schools: a different set of rules

Fee-paying schools are shut out of the headline grant routes: no GB Energy, no Salix, no PSDS, and CIF does not apply. That does not make solar a worse investment, only a differently funded one. Private schools typically pay for a system outright, take a PPA, or use commercial finance, and as businesses they can often claim capital allowances against the cost, which state schools cannot. The 0% VAT concession only reaches an independent school’s residential buildings such as boarding houses; teaching blocks carry standard-rate VAT. Given a fee-paying school’s usually higher daytime demand, self-consumption and therefore payback can be strong.

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