Solar Panels for Shops & Retail in Ireland
Retail solar PV suits Irish shops, convenience stores and supermarkets because their busiest hours run right through the day, when solar is generating. A typical retail system runs from 10 kWp on a small high-street shop up to 150 kWp on a full-size supermarket. This page sits under our commercial solar guide. When you're ready, you can compare retail solar quotes from SEAI-registered installers.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Quick Answer
Solar panels for Irish shops typically run 10–150 kWp: roughly 10–30 kWp for a convenience store and 80–150 kWp for a supermarket. At €800–€900 per kWp installed, less the SEAI NDMG grant and ACA tax relief, payback is usually 5–7 years. Retail sites pay back fast because long opening hours and refrigeration create heavy daytime load, so 80–90% of the solar is used on-site.
Why solar works for retail in Ireland
Retail is one of the strongest fits for commercial solar in Ireland. Shops, convenience stores and supermarkets trade through the middle of the day and into the evening, so their electricity demand lines up almost exactly with when rooftop solar generates. That means most of the power is used on-site rather than exported, which is where the real savings sit. Commercial import electricity costs around 22c/kWh, while the commercial Clean Export Guarantee pays roughly 18c/kWh, so every kWh you use yourself is worth more than one you sell back.
The biggest daytime load in most retail units is refrigeration. Chillers, freezers, deli cabinets and cold rooms run continuously and draw heavily during opening hours, alongside lighting, tills, heating and ventilation. Because that base load is so steady, retail sites routinely reach 80–90% self-consumption, which is high for commercial solar and the main reason payback is quick.
High daytime load
Long opening hours plus refrigeration mean demand is highest exactly when the panels are producing, so little solar is wasted.
Storefront messaging
Visible rooftop solar and in-store sustainability signage support ESG reporting and resonate with local shoppers.
Multi-site rollouts
Chains and franchises can standardise one system design across branches and roll it out store by store with a single installer.
What size solar system does a shop need?
Most Irish retail solar systems fall between 10 and 150 kWp. A small high-street shop or pharmacy usually suits 10–30 kWp, a mid-size convenience store or forecourt shop 30–60 kWp, and a full supermarket 80–150 kWp. The right size depends on your annual electricity use, your refrigeration load and the available roof area, roughly 4–5 m² of roof per kWp installed.
| Retail Type | Typical System | Panels | Roof Area | Annual Generation |
|---|---|---|---|---|
| Small shop / pharmacy | 10–20 kWp | 25–50 | 50–100 m² | ~9,000–17,000 kWh |
| Convenience store | 20–40 kWp | 50–100 | 100–200 m² | ~17,000–34,000 kWh |
| Forecourt / petrol station shop | 30–60 kWp | 75–150 | 150–300 m² | ~26,000–52,000 kWh |
| Mid-size supermarket | 60–100 kWp | 150–250 | 300–500 m² | ~52,000–86,000 kWh |
| Large supermarket | 100–150 kWp | 250–375 | 500–750 m² | ~86,000–129,000 kWh |
Generation estimates assume an average Irish solar yield of roughly 860 kWh/kWp. Actual output varies by roof orientation, pitch and shading. For retail, the priority is matching the array to your daytime base load, oversizing well beyond your self-consumption simply pushes more electricity onto the lower export rate.
Retail solar grants, tax relief & payback
Retail solar in Ireland is supported by the SEAI Non-Domestic Microgeneration Grant (NDMG), which pays up to a maximum of €162,600 on larger systems, this is the business grant, not the much smaller domestic SEAI grant. On top of that, trading companies can use the Accelerated Capital Allowance (ACA) to write off 100% of qualifying solar and battery cost against profits in the first year, provided the equipment is on the Triple-E register.
With installed cost around €800–€900 per kWp, a high self-consumption profile and strong daytime trading, retail sites typically see a payback of 5–7 years and an annual ROI in the region of 10–15%. The table below shows indicative figures for common retail systems.
| System Size | Gross Cost (est.) | NDMG Grant | Self-Consumption | Indicative Payback |
|---|---|---|---|---|
| 20 kWp (small shop) | €16,000–€18,000 | €6,000 | ~85% | 5–7 years |
| 50 kWp (convenience / forecourt) | €40,000–€45,000 | €12,000 | ~85–90% | 5–6 years |
| 100 kWp (mid supermarket) | €80,000–€90,000 | €22,000 | ~80–90% | 5–7 years |
| 150 kWp (large supermarket) | €120,000–€135,000 | €32,000 | ~80–85% | 6–7 years |
Figures are estimates based on Irish market rates in 2026 and the published NDMG grant bands. Net cost after grant and ACA relief is materially lower than the gross figure for a VAT-registered trading company. Battery storage is not covered by the NDMG grant but can qualify for ACA.
Why self-consumption drives ROI
Every unit you use on-site avoids buying grid electricity at roughly 22c/kWh. Exported surplus earns about 18c/kWh under the commercial Clean Export Guarantee. Because refrigeration and trading hours keep demand high through daylight, retail sites consume most of their generation directly, which is why they tend to land at the faster end of the payback range.
Roof, planning & install considerations for shops
Retail roofs vary widely, from flat single-storey supermarket roofs ideal for ballasted arrays, to pitched high-street units and forecourt canopies. A site survey confirms roof structure, available area, shading from signage or plant, and the route for cabling back to the main distribution board near your refrigeration plant.
- Flat roofs: most large stores use ballasted, non-penetrating frames at an optimal tilt, avoiding holes in the roof membrane. A structural check confirms the roof can carry the added load.
- Planning: rooftop solar is largely planning-exempt under S.I. 493/2022 within the relevant area caps for commercial and industrial buildings. Larger arrays, ground-mount or protected-structure frontages may need permission, your installer should confirm before quoting. See our planning permission guide.
- Grid connection: connection runs through ESB Networks under the NC6 process for smaller systems or NC7 for larger systems up to 200kW, with EN 50549 inverter compliance required.
- Refrigeration tie-in: size the array to your base refrigeration and lighting load first; this is the demand that runs all day and delivers the highest self-consumption.
- Trading disruption: most retail installs are staged to avoid closing the store. A 50 kWp system is usually a few days' work; larger supermarket arrays run one to three weeks with roof access managed around deliveries.
- Multi-site rollouts: chains can standardise a single system specification and roll it out branch by branch, which simplifies procurement, ACA claims and reporting.
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Compare commercial solar quotesRetail Solar FAQ
How many solar panels does a supermarket need in Ireland?
A full-size Irish supermarket typically installs 80–150 kWp, which is roughly 200–375 panels, depending on roof area and refrigeration load. A mid-size store often suits 60–100 kWp. The exact figure comes from your annual electricity use and the usable roof space at about 4–5 m² per kWp.
Is solar worth it for a small shop?
Yes. Small shops and convenience stores trade through the day and run refrigeration continuously, so they use 80–90% of the solar on-site at around 22c/kWh. With the NDMG grant and ACA tax relief, a 10–30 kWp system usually pays back in 5–7 years.
What grant can a retail business get for solar in Ireland?
Retail businesses use the SEAI Non-Domestic Microgeneration Grant (NDMG), worth up to a maximum of €162,600 on larger systems, not the small domestic grant. Trading companies can also write off 100% of qualifying cost in year one through the Accelerated Capital Allowance (ACA).
Why is payback faster for retail than other businesses?
Retail load is heaviest during daylight because of long opening hours and continuous refrigeration. That means most of the generation is used on-site at the higher import rate (around 22c/kWh) rather than exported at about 18c/kWh, pushing payback to the quicker end of the 5–7 year range.
Can a retail chain roll out solar across multiple stores?
Yes. Chains and franchises commonly standardise one system design and roll it out branch by branch with a single installer. This keeps procurement, NDMG applications and ACA claims consistent, and lets you report combined energy and carbon savings across the estate.
Related Guides
Commercial Solar
Solar panels for Irish businesses: costs, NDMG grants, and ROI.
Solar for Offices
Office solar PV: 9-5 load match, costs, NDMG grant, and ROI.
Solar for Hotels
Hotel & guesthouse solar: hot water, sizing, grants, and ROI.
Solar for Warehouses
Warehouse solar PV: sizing, NDMG grant, and ROI in Ireland.
Sources
- SEAI, Non-Domestic Microgen Grant (NDMG)
- SEAI, Accelerated Capital Allowance (ACA)
- ESB Networks, Generator Connections (NC6 / NC7)
Last updated: June 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder 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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