Solar Panels for Warehouses & Distribution Centres in Ireland
Warehouses are one of the strongest fits for commercial solar in Ireland. The large flat or low-pitch roof gives you a big, unshaded area to fill, and operations such as chillers, forklift charging and lighting create daytime demand that solar can serve directly. Most sites land in the 30–200+ kWp range, qualify for the SEAI NDMG grant of up to €162,600, and pay back in 5–7 years. You can compare warehouse solar quotes from Irish installers below.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Quick Answer
Warehouses in Ireland typically fit 30-200+ kWp of solar on their large flat or low-pitch roofs, costing €800-€900/kWp installed. The SEAI NDMG grant covers up to €162,600 and ACA lets trading companies write off 100% of the cost in year one. With strong daytime load from chillers, forklift charging and lighting, self-consumption runs high and payback is usually 5-7 years at around 10-15% ROI.
Why warehouses are ideal for solar
The single biggest advantage of a warehouse or distribution centre is roof area. A modern shed often has thousands of square metres of flat or shallow-pitch roof with no dormers, chimneys or overshadowing. That gives you a clean canvas to mount a large array on ballasted or rail-mounted frames, usually without penetrating the roof membrane. As a rule of thumb, every 1 kWp needs roughly 4–5 m², so a 2,000 m² usable roof can carry around 400–500 kWp before you reach structural or grid limits.
The second factor is the load profile. Warehouse demand is rarely flat. Refrigerated and chilled stores run compressors through the day, electric forklift and MHE fleets charge between shifts, and high-bay LED lighting and conveyor systems draw steady power during operating hours. Where a site runs a strong daytime shift pattern, self-consumption can reach 80–90%, and that is where solar earns the most: every kWh used on-site offsets electricity bought at roughly €0.22/kWh.
Huge roof area
Large unobstructed flat or low-pitch roofs let you size the array to demand rather than to available space.
Daytime load
Chillers, forklift charging and lighting create demand while the sun is up, lifting self-consumption and ROI.
Export & storage upside
Where roof space exceeds on-site demand, surplus can be exported under the Clean Export Guarantee or shifted with a battery.
What size solar system does a warehouse need?
Most Irish warehouses install between 30 and 200 kWp, with larger distribution centres and cold stores going well beyond 200 kWp. The right size is driven by three things: your annual electricity consumption, the usable roof area, and your grid connection limit. Because roof space is rarely the constraint on a warehouse, the sizing conversation usually centres on demand and how much surplus you want to export or store.
| Warehouse Type | Typical System | Usable Roof | Annual Generation | Notes |
|---|---|---|---|---|
| Small storage unit / trade depot | 30–50 kWp | 150–250 m² | ~26,000–43,000 kWh | Lighting and small plant load |
| Mid-size distribution warehouse | 50–100 kWp | 250–500 m² | ~43,000–86,000 kWh | Forklift charging, conveyors |
| Large distribution centre | 100–200 kWp | 500–1,000 m² | ~86,000–172,000 kWh | Multi-shift, high-bay LED |
| Refrigerated / cold store | 150–300+ kWp | 750–1,500+ m² | ~129,000–258,000+ kWh | High constant chiller load |
| National logistics hub | 200–1,000 kWp | 1,000–5,000 m² | ~172,000–860,000 kWh | May exceed on-site demand |
Generation estimates assume an average Irish yield of ~860 kWh per kWp per year. Roof area uses a rule of thumb of 4–5 m² per kWp for low-pitch and ballasted layouts. Where roof space exceeds your daytime demand, a battery or an export contract turns surplus into value rather than waste.
Warehouse solar grants, tax relief & payback
Warehouse installs are eligible for 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 domestic €1,800 scheme. On top of the grant, trading companies can use the Accelerated Capital Allowance (ACA) to write off 100% of qualifying solar and battery cost against profits in year one, provided the equipment is on the Triple-E register. Together with self-consumption savings, these supports are what bring payback down to roughly 5–7 years.
| System Size | Gross Cost (est.) | NDMG Grant | Net Cost (est.) | Indicative Payback |
|---|---|---|---|---|
| 50 kWp | €40,000–€45,000 | €12,000 | €28,000–€33,000 | 5–7 years |
| 100 kWp | €80,000–€90,000 | €22,000 | €58,000–€68,000 | 5–7 years |
| 200 kWp | €160,000–€180,000 | €42,400 | €118,000–€138,000 | 5–7 years |
The economics hinge on self-consumption. Commercial import electricity sits around €0.22/kWh, while the commercial Clean Export Guarantee (CEG) rate is roughly €0.18/kWh. Every unit you use on-site is therefore worth more than a unit you export, which is why a warehouse with a strong daytime load, chillers running, fleet charging, lights on, achieves 80–90% self-consumption and the best return. Where generation routinely exceeds demand, a battery or a CEG export contract recovers the surplus, and a typical project lands around 10–15% annual ROI.
Forklift & fleet charging
If you run electric MHE or are moving HGV and van fleets to electric, scheduling charging for daylight hours pairs neatly with a warehouse array and pushes self-consumption higher. See our solar carport guide if you also have a yard or car park to cover.
Roof, planning & install considerations
Before sizing the array, the practical questions on a warehouse are about the roof and the grid. A structural assessment confirms the roof can carry the added load of panels and ballast, which matters on older steel-frame sheds and on profiled metal decks. Roof age and remaining membrane life are worth checking too, you do not want to re-roof under a five-year-old array. Cable runs from a large roof down to the main switchroom can be long, so the electrical design needs to account for that.
| Factor | What to check |
|---|---|
| Roof structure | Load capacity for panels plus ballast; condition of purlins and decking on older sheds |
| Roof type | Flat membrane suits ballasted frames; trapezoidal metal uses clamp-mounted rails with no penetrations |
| Planning | Rooftop solar is largely exempt under S.I. 493/2022 within industrial area caps; very large or ground-mount arrays may need permission |
| Grid connection | ESB Networks NC6 for small systems, NC7 for larger up to 200kW; inverters must meet EN 50549 |
| Fire & access | Maintenance walkways, isolation points and DC routing planned with fire safety in mind |
On grid, the connection route depends on size. Smaller arrays go through the ESB Networks NC6 process, while larger warehouse systems up to 200kW use NC7, and anything bigger moves into a full connection application. Your installer handles the inverter EN 50549 compliance and the paperwork. For larger distribution centres the grid limit, not the roof, is often what caps the system, so confirm your available export capacity early.
Have farm buildings too?
If your operation includes agricultural sheds, a different grant applies. The TAMS 3 Solar Capital Investment Scheme funds up to 60% of on-farm solar. See our farm solar guide for the agricultural route.
Warehouse Solar FAQ
How many solar panels can a warehouse roof hold?
It depends on usable roof area. As a rule of thumb, 1 kWp needs roughly 4-5 m² with low-pitch or ballasted layouts, so a 1,000 m² usable roof can carry around 200-250 kWp. Structural load and your grid connection limit often cap the system before roof space does.
What size solar system suits a distribution centre in Ireland?
Most Irish warehouses fit 30-200+ kWp. Mid-size distribution warehouses usually land at 50-100 kWp, large distribution centres at 100-200 kWp, and refrigerated or cold stores often go beyond 200 kWp because of their constant chiller load.
Is warehouse solar worth it if we run cold storage?
Often yes. Refrigerated stores carry a heavy, fairly constant daytime load that solar serves directly, so self-consumption tends to be high, around 80-90%. At a commercial import price near €0.22/kWh, every unit used on-site delivers strong savings and supports a 5-7 year payback.
What grant can a warehouse get for solar?
The SEAI Non-Domestic Microgeneration Grant (NDMG) pays up to a maximum of €162,600 on larger systems. Trading companies can also use the Accelerated Capital Allowance to write off 100% of qualifying solar and battery cost against profits in year one via the Triple-E register.
Do warehouse solar panels need planning permission?
Rooftop solar on warehouses is largely planning-exempt under S.I. 493/2022 within the industrial area caps, which are more generous than domestic limits. Very large arrays or ground-mounted systems may still need permission, so confirm the caps with your installer for your specific roof.
Related Guides
Commercial Solar
Solar panels for Irish businesses: costs, NDMG grants, and ROI.
Solar for Factories
Manufacturing solar: high daytime load, sizing, grants, payback.
Solar Carports
Solar carport canopies for car parks: costs, NDMG grant eligibility, EV charging, and ROI.
Solar for Offices
Office solar PV: 9-5 load match, costs, NDMG grant, and ROI.
Sources
- SEAI, Non-Domestic Microgen Scheme (NDMG)
- SEAI, Accelerated Capital Allowance
- ESB Networks, Generator Connections (NC6 / NC7)
Last updated: June 2026
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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