Solar Panels for Schools in Ireland: Costs, Grants & ROI
Solar PV is one of the clearest wins on a school roof. A school runs almost entirely during daylight hours, which is exactly when panels generate, so most of the electricity is used on site rather than exported. This guide covers the Department of Education's Schools Photovoltaic Programme, typical system sizes, the SEAI Non-Domestic Microgen Grant (NDMG), and payback for primary and post-primary schools. See our commercial solar hub for the wider picture, or compare commercial solar quotes for your building.
Last updated September 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Quick Answer
Most Irish schools fit a 6–50 kWp solar PV system, depending on roll size and roof area. A school's daytime, term-time electricity use lines up well with solar generation, so self-consumption is high (often 70–85%). At roughly €800–€900 per kWp before grants, and with the SEAI NDMG grant plus public-sector funding routes, payback is typically 5–7 years with around a 10–15% annual return.
Why solar works well on a school roof
A school's load profile is close to ideal for solar PV. Lighting, heating controls, IT suites, kitchens, and ventilation all draw power during the school day, which is the same window when panels are producing. That overlap means a high share of the generated electricity is used on site rather than exported. With commercial import prices around 22c/kWh and export under the Clean Export Guarantee closer to 18c/kWh, self-consumption is where the value sits, and schools self-consume well.
The term-time pattern is the main thing to plan around. Schools are quiet over July and August, when solar yield is at its peak, so a sensibly sized system avoids over-exporting cheap summer units. Pitched and flat roofs on school buildings are usually large, unshaded, and structurally straightforward, which keeps installation costs predictable. Many boards of management also value the teaching angle: a visible array with a simple monitoring display ties directly into the curriculum on energy and climate.
Daytime load match
Power is used when the sun is up, so 70–85% of generation is typically consumed on site rather than exported.
Public-sector funding
The Schools Photovoltaic Programme fully funds up to 6 kWp for eligible schools, and the SEAI NDMG grant covers larger systems.
Educational value
A visible array and live monitoring support climate and energy teaching, and reinforce the school's Green-Schools work.
What size solar system does a school need?
Most Irish schools land somewhere between 6 and 50 kWp. A small rural primary school with a modest electricity bill might only need 6–12 kWp, while a large post-primary school with IT suites, a sports hall, and a canteen can use 30–50 kWp or more. The right size is driven by your annual electricity use and available roof area, not by roof size alone. The aim is to cover a strong share of daytime demand without producing large summer surpluses that only earn the export rate.
| School Type | Typical System | Panels | Roof Area | Annual Generation |
|---|---|---|---|---|
| Small primary (rural) | 6–12 kWp | 14–30 | 30–60 m² | ~5,000–10,000 kWh |
| Medium primary | 12–25 kWp | 30–60 | 60–125 m² | ~10,000–21,000 kWh |
| Post-primary / secondary | 25–50 kWp | 60–125 | 125–250 m² | ~21,000–43,000 kWh |
| Large campus / community college | 50–100 kWp | 125–250 | 250–500 m² | ~43,000–86,000 kWh |
Rule of thumb: 1 kWp needs roughly 4–5 m² of roof and generates around 860 kWh/year in Ireland. Generation figures are estimates for 2026 and vary by roof pitch, orientation, and shading. A site survey of your actual electricity bills is the only way to size accurately.
The Schools Photovoltaic Programme explained
The Schools Photovoltaic Programme is the Department of Education scheme that funds up to 6 kWp of roof-mounted solar PV for eligible schools at no cost to the school, including the grid connection, a monitoring system, and a display screen for the classroom. The school runs a competitive quotation process with contractors from the SEAI Non-Domestic Microgen (NDMG) company list, and the Department reviews the quotes and provides full funding for approved costs.
The programme rolled out in phases. The first phase opened in November 2023, and the second phase invited all remaining schools from 11 November 2024, with registration closing in March 2025, funding applications due by 31 October 2025, and installations targeted for completion by the end of 2025. The Department has revised programme dates before and contacts School Authorities directly by email, so check with the Department if your school registered but has not yet completed its installation.
The main limitation is size. A 6 kWp array generates roughly 5,200 kWh a year, which a medium primary school comfortably exceeds and a post-primary school uses many times over. Schools that missed the programme windows, or that want a system sized to their actual daytime load, use the SEAI NDMG grant route covered below.
Grants, ACA, and payback for schools
The main support is the SEAI Non-Domestic Microgen Grant (NDMG), the non-domestic scheme that funds solar PV for businesses, farms, schools, and community buildings. It is not the small domestic grant. NDMG is paid per kWp on a sliding scale, with smaller systems attracting a higher rate per kWp, up to a maximum of €162,600 on the largest systems, far above what a typical school array reaches. For a fully funded 6 kWp starter system, the Schools Photovoltaic Programme above is the first port of call; NDMG is the route for a system sized to your actual demand. See our commercial solar grants guide for full rates, eligibility rules, and application steps.
| System Size | Gross Cost (est.) | Net Cost After Support (est.) | Annual Saving (est.) | Payback |
|---|---|---|---|---|
| 10 kWp | €8,000–€9,000 | €5,000–€6,500 | €1,400–€1,800 | ~4–6 yrs |
| 25 kWp | €20,000–€22,500 | €14,000–€17,000 | €3,500–€4,500 | ~5–7 yrs |
| 50 kWp | €40,000–€45,000 | €28,000–€34,000 | €7,000–€9,000 | ~5–7 yrs |
Installed cost assumes roughly €800–€900 per kWp at commercial scale. Net cost shown is after typical NDMG support; actual support depends on system size and the funding route used. Savings assume strong daytime self-consumption at about 22c/kWh import. Figures are estimates and vary by school.
Self-consumption is the driver
Because a school uses most of its power during the day, it avoids buying grid units at roughly 22c/kWh. Export under the Clean Export Guarantee earns closer to 18c/kWh, so a well-sized system that is mostly self-consumed delivers the best return and a 5–7 year payback.
ACA for trading entities
Where a school operates through a trading company that pays tax, the Accelerated Capital Allowance (ACA) lets it write off 100% of qualifying solar and battery cost against profits in year one. Most schools are not trading entities, so ACA usually applies to attached commercial operations rather than the school itself.
Roof, planning, and install considerations
Rooftop solar on a school is planning-exempt under Class 61, added by S.I. 493/2022 specifically for educational buildings. There is no cap on panel area unless the school is inside one of the 43 Solar Safeguarding Zones around airports, where the cap is 300 m² and the council must be notified within 4 weeks. Panels must sit within 15 cm of a pitched roof (1.2 m of a flat roof) and the power must be primarily used on site. Ground arrays over 75 m², wall-mounted panels, or work on a protected structure need planning permission, so confirm the exemption for your specific roof before committing. See our commercial solar guide for the wider rules.
| Factor | What to check |
|---|---|
| Roof condition & age | Confirm the roof has 20+ years of life left before mounting panels, to avoid removing them for re-roofing. |
| Structural loading | Flat roofs use ballasted frames; a structural sign-off confirms the roof can carry the added weight. |
| Grid connection | ESB Networks NC6 (small) or NC7 (larger, up to 200kW) process; inverters must meet EN 50549. |
| Works timing | Schedule the install during midterm or summer holidays to avoid disruption to classes. |
| Health & safety | Roof access and scaffolding must be managed so works are fully separated from pupils and staff. |
| Summer over-generation | Avoid oversizing past summer demand, since holiday surplus only earns the lower export rate. |
Sequence the funding first
Do not start installation before your grant or funding offer is in place, or you risk losing it. Confirm your funding route, whether NDMG or a Department of Education pathway, then arrange the ESB Networks connection, and only then begin works.
Solar Panels for Schools FAQ
What size solar PV system does an Irish school need?
Most schools fit between 6 and 50 kWp. A small rural primary school might only need 6–12 kWp, a medium primary 12–25 kWp, and a post-primary school 25–50 kWp. Size is set by your annual electricity use and roof area, confirmed by a survey of your bills.
What is the Schools Photovoltaic Programme?
It is the Department of Education scheme that fully funds up to 6 kWp of roof-mounted solar PV for eligible schools, including the grid connection, a monitoring system, and a classroom display screen. Phase 2 invited all remaining schools from November 2024, with installations targeted for completion by the end of 2025. Systems are installed by contractors on the SEAI NDMG company list. Schools that missed the windows or need a larger system use the SEAI NDMG grant instead.
Can schools get a grant for solar panels in Ireland?
Yes. Schools are eligible for the SEAI Non-Domestic Microgen Grant (NDMG), which funds solar PV for non-domestic buildings up to a maximum of €162,600 on the largest systems. Schools may also access Department of Education and other public-sector energy funding routes, so check which pathway fits your school before applying.
What is the payback period for solar on a school?
Typically 5–7 years, with roughly a 10–15% annual return. Because a school's electricity use is during the day in term time, most generation is self-consumed at around 22c/kWh rather than exported, which is what drives the strong payback.
Does a school waste solar power over the summer holidays?
Summer is when yield is highest but the school is quiet, so any surplus is exported at roughly 18c/kWh rather than self-consumed. The fix is to avoid oversizing past summer demand, so the system stays mostly self-consumed across the rest of the year.
Do solar panels on a school need planning permission?
Rooftop solar on a school is planning-exempt under Class 61 of the planning regulations, added by S.I. 493/2022 for educational buildings. There is no area cap outside the 43 Solar Safeguarding Zones around airports (300 m² cap inside one, with 4-week notification to the council). Ground arrays over 75 m², wall-mounted panels, or protected structures need permission, so confirm the exemption for your specific roof first.
Related Guides
Commercial Solar
Solar panels for Irish businesses: costs, NDMG grants, and ROI.
Commercial Solar Grants
SEAI NDMG up to €162,600, TAMS 3 for farms, ACA tax relief, and how to apply.
Solar for GAA Clubs
GAA club & community hall solar: floodlights, grants, sizing.
Solar for Offices
Office solar PV: 9-5 load match, costs, NDMG grant, and ROI.
Sources
- Department of Education, Schools Photovoltaic Programme
- SEAI, Non-Domestic Microgen Scheme (NDMG)
- SEAI, Accelerated Capital Allowance
- ESB Networks, Micro and Small-Scale Generation
Last updated: September 2026
John Rooney is the editor of Solar Info and has been covering the Irish solar energy market since 2023. He fact-checks all content against official SEAI data and maintains relationships with SEAI-registered installers across Ireland.
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