Solar Panels for Schools: Costs, Funding & Payback
UK schools have ideal solar profiles — large flat or shallow-pitched roofs, daytime electricity demand, and long building lifespans. With the right funding route, a solar install can cut energy bills by 30–60% and pay back in 6–10 years.
Quick Answer
A typical UK primary school installs a 30–50kW solar system costing £25,000–£50,000 and saves £3,000–£8,000 a year on electricity. Secondary schools usually fit 100–250kW systems costing £80,000–£250,000 with savings of £12,000–£35,000 a year. Schools fund solar through Salix interest-free loans (DfE/DESNZ-backed), Power Purchase Agreements (zero upfront cost, fixed cheap electricity rate), capital budgets, or community energy partnerships. Payback is typically 6–10 years; system lifespan is 25–30 years.
Why solar panels work so well for schools
Roof area
Large, unshaded, flat or shallow-pitched roofs are perfect for ballasted or pitched mounting systems. Most schools have 200–1,000m² of usable roof.
Daytime demand
Schools use most of their electricity 8am–4pm, which is when solar generates. Self-consumption rates of 70–90% are common — far better than homes (30–40%).
Long ownership
Schools occupy buildings for decades. Over a 25-year panel lifespan, the lifetime savings dwarf the install cost — typically a 4–6× return.
Curriculum & STEM
Live generation dashboards integrate into geography, science, and citizenship lessons. A visible commitment to net zero supports DfE Climate Change Strategy goals.
Holiday export
Closed in summer? Surplus generation is exported via Smart Export Guarantee, providing a useful secondary income stream during low-demand periods.
Energy security
Locks in cheap electricity for 25+ years, insulating budgets from future wholesale price spikes.
How much do solar panels cost for a school?
Costs scale with system size. Larger systems get a better cost per kW because installation overheads are diluted.
| School type | System size | Total cost (2026) | Cost per kWp |
|---|---|---|---|
| Small primary | 20–30kW | £18,000–£30,000 | £900–£1,000 |
| Large primary | 30–50kW | £25,000–£50,000 | £800–£1,000 |
| Small secondary | 50–100kW | £40,000–£100,000 | £750–£1,000 |
| Large secondary / academy | 100–250kW | £80,000–£250,000 | £700–£1,000 |
| FE college / multi-site | 250–500kW+ | £175,000–£500,000+ | £650–£900 |
Prices include panels, inverters, mounting, cabling, commissioning, scaffolding, and DNO connection. Battery storage adds £400–£700 per kWh and is usually not cost-effective for schools (high self-consumption already).
Note on VAT: Schools pay 20% VAT on solar installations (commercial rate). State-funded schools can usually reclaim VAT through their local authority or Multi-Academy Trust; private schools may not.
How much could a school save?
Savings depend on system size, electricity price, and self-consumption rate. The figures below assume a non-domestic electricity unit rate of 28p/kWh (typical 2026) and 75% self-consumption.
| System size | Annual generation | Annual bill saving | SEG export income | 25-year saving |
|---|---|---|---|---|
| 30kW | ~27,000kWh | £5,700 | £700 | £160,000+ |
| 50kW | ~45,000kWh | £9,500 | £1,200 | £267,000+ |
| 100kW | ~90,000kWh | £19,000 | £2,400 | £535,000+ |
| 250kW | ~225,000kWh | £47,000 | £6,000 | £1.3m+ |
Figures include 0.5% per year panel degradation and assume no electricity price increases over 25 years (in practice, savings will be much higher as prices rise).
Funding options for school solar
Salix Public Sector Decarbonisation Scheme
Salix administers grants from DESNZ for public-sector decarbonisation projects, including solar. State schools, academies, and FE colleges can apply when funding rounds open. Grants typically cover 60–100% of project cost.
Pros: Largest grant funding pot; supports combined solar + insulation + heat pump bundles. Cons: Competitive, application-driven, rounds open intermittently.
Power Purchase Agreement (PPA)
A third party owns and installs the system at no cost to the school. The school buys the electricity it generates at a fixed, below-market rate (typically 10–15p/kWh) for 20–25 years.
Pros: Zero upfront cost; immediate bill savings. Cons: Lower lifetime saving than ownership; locked into contract.
Capital budget / reserves
Pay outright from the school’s capital budget or Devolved Formula Capital. Best return on investment if funds are available — the school keeps 100% of the savings.
Pros: Maximum lifetime savings; asset on the balance sheet. Cons:Large upfront commitment; opportunity cost.
Community energy partnership
A local community energy co-op (e.g. Solar for Schools, Schools’ Energy Co-operative) raises capital from community shares to install panels, leasing them back to the school at a discount.
Pros: Zero upfront; community engagement. Cons: Requires a partner scheme operating in your area.
Let’s Go Zero / Climate Action Plan funding
Some MATs and local authorities allocate net-zero-specific funding pots. The Let’s Go Zero campaign supports schools with project planning and signposting to grant opportunities.
Pros: Mission alignment with DfE Sustainability & Climate Change Strategy.
The installation process
- Feasibility study — an MCS-certified installer surveys the roof structure, electrical infrastructure, and consumption profile. Half-hourly meter data is used to size the system optimally.
- DNO application — for systems above 3.68kW per phase (most school systems), the Distribution Network Operator must approve grid connection. This can take 3–12 weeks.
- Funding decision — secure capital budget, sign PPA contract, or submit Salix application.
- Procurement — for academies and LA-maintained schools, follow the Procurement Act 2023 rules (in force 24 February 2025) for projects above the relevant threshold; smaller projects can use framework agreements such as Crown Commercial Service RM6312.
- Installation — typically 1–3 weeks for primary schools, 3–8 weeks for secondary. Most schools schedule installs during half-term or summer holidays.
- Commissioning & G99 signoff — installer registers the system with the DNO and your SEG provider.
- Monitoring — live generation dashboards (e.g. SolarEdge, Enphase, SMA) feed STEM lessons and track ROI.
Solar Panels for Schools: FAQ
How much do solar panels cost for a school?
A typical UK primary school spends £25,000–£50,000 on a 30–50kW system, while secondary schools spend £80,000–£250,000 on 100–250kW systems. Cost per kWp ranges from £700 for large installs to £1,000 for small ones, including panels, inverters, mounting, scaffolding, and DNO connection.
How much do solar panels save a school per year?
A 30kW primary school system saves around £5,700 per year on electricity bills plus £700 in SEG export income. A 100kW secondary school system saves £19,000 plus £2,400 export income. Savings rise as electricity prices increase.
What is the payback period for school solar?
6–10 years for self-funded systems, depending on size, install cost, and electricity tariff. After payback, schools enjoy 15–20 years of effectively free electricity from the panels.
Can schools get free solar panels?
Effectively yes, via two routes: (1) a Salix grant covering 60–100% of cost, or (2) a Power Purchase Agreement where a third party installs at no cost and the school just pays for the electricity at a discounted rate. Both deliver immediate bill savings with zero upfront cost.
Do schools pay VAT on solar panels?
Yes, 20% VAT applies to commercial solar (schools are not domestic). State-funded schools can typically reclaim VAT via their LA or MAT. Private schools may not be able to reclaim, depending on charitable VAT status.
How long do solar panels last on a school?
Panels carry 25-year performance warranties and typically remain productive for 30+ years. Inverters last 10–15 years and need replacement once during the system lifetime (£3,000–£15,000 depending on size).
Do solar panels need planning permission for schools?
Most rooftop solar on schools is permitted development under Schedule 2, Part 14, Class J of the General Permitted Development Order 2015 (non-domestic buildings) provided the panels do not extend more than 200mm beyond the roof slope, are not on a listed building, and the building isn't in a conservation area. Ground-mounted systems and any of those exceptions require full planning permission.
Can solar panels be used in lessons?
Yes — most installers provide live generation dashboards that can be displayed in classrooms or accessed online. These are widely used in geography, science, maths, and citizenship lessons, and align with DfE's Climate Change Strategy.
Related Guides
Commercial Solar
Solar panels for UK businesses: costs, capital allowances, and ROI.
Farm Solar
Farm solar panels: FETF grants, costs, and sizing by farm type.
Solar Incentives
0% VAT, Smart Export Guarantee, ECO4, and business capital allowances.
Solar Financing
Loans, payment plans, and how to finance solar panels.
Sources
- Salix — Public Sector Decarbonisation Scheme — salixfinance.co.uk
- DfE — Sustainability and Climate Change Strategy — gov.uk
- Let’s Go Zero — letsgozero.org
- Ofgem — Smart Export Guarantee — ofgem.gov.uk
Last updated: May 2026.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.
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