Farm solar · Northern Ireland
Farm solar built around your sheds
Three-phase systems on shed roofs, sized to milking, cooling, drying and ventilation loads.
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What you get
Designed for how a farm uses power
Roof survey first
We check asbestos sheeting and purlin strength before anything else.
Rural grid checked early
We look at local network capacity with NIE Networks before we design.S21
Storage for cold sheds (coming soon)
Eleven Energy sodium-ion, coming soon, charges down to minus 20°C, so it will suit outbuildings through the winter.S11
Worked examples
What a system could cost and save
Two example systems, worked out from published figures. They are examples, not customers. Your free survey gives your own figures.
Worked example
Farm A: 91 panels (40.04 kW) on a dairy shed
A dairy producing 1.5 million litres a year, using about 63,500 kWhS59.
System
91 × 440 W panels, 40.04 kW, three-phase
Cost
£48,208, no grant counted
Makes
32,623 kWh a year
First-year saving
£3,938 to £6,300
Payback
7.7 to 12.2 years
Payback counts savings on your bill only, not export payments. We confirm at your survey whether export payments apply to yours.
Farm businesses may qualify for the NISEP business grant; we check this at survey.
How we worked this out
- Cost: 40.04 kW × £1,204 per kW, the 2025-26 median for 10 to 50 kWS42S43, excluding VAT
- Farm use: 1,500,000 litres × 42.34 Wh per litreS59. 62% of dairy use falls between 9am and midnightS59. East-west sheds may make less: your survey checks your roof.
- Output: 40.04 kW × 823 kWh per kW a year, the measured average for all NI solar in 2025S40, less 1% first-year wearS60 = 32,623 kWh
- Used on the farm: shown as 50% to 80% (16,312 to 26,098 kWh). Saves £3,938 to £6,300 at 24.14p, the UK business averageS51. Small businesses often pay moreS52, which shortens payback.
- Exported: 16,311 to 6,525 kWh. Not counted: export payments are left out of these figures.
- Simple payback: £48,208 ÷ £6,300 = 7.7 years, to £48,208 ÷ £3,938 = 12.2 years. No grant counted. Capital allowancesS31 are not included.
Worked example
Farm B: 113 panels (49.72 kW) on a larger dairy
A dairy producing 3 million litres a year, using about 127,000 kWhS59, with milking, cooling and water heating through the day.
System
113 × 440 W panels, 49.72 kW, three-phase
Cost
£59,863, no grant counted
Makes
40,510 kWh a year
First-year saving
£6,845 to £8,801
Payback
6.8 to 8.7 years
Payback counts savings on your bill only, not export payments. We confirm at your survey whether export payments apply to yours.
Farm businesses may qualify for the NISEP business grant; we check this at survey.
How we worked this out
- Cost: 49.72 kW × £1,204 per kW, the 2025-26 median for 10 to 50 kWS42S43, excluding VAT
- Farm use: 3,000,000 litres × 42.34 Wh per litreS59. The system makes about a third of that, and 62% of dairy use falls between 9am and midnightS59, so more of it is used on the farm than on Farm A. Sized just under 50 kW so the Power NI export price appliesS50. Three-phase, approved under G99/NI firstS21.
- Output: 49.72 kW × 823 kWh per kW a year, the measured average for all NI solar in 2025S40, less 1% first-year wearS60 = 40,510 kWh
- Used on the farm: shown as 70% to 90% (28,357 to 36,459 kWh). Saves £6,845 to £8,801 at 24.14p, the UK business averageS51. Small businesses often pay moreS52, which shortens payback.
- Exported: 12,153 to 4,051 kWh. Not counted: export payments are left out of these figures.
- Simple payback: £59,863 ÷ £8,801 = 6.8 years, to £59,863 ÷ £6,845 = 8.7 years. No grant counted. Capital allowancesS31 are not included.
See all seven examples and how we work them out → · Get my free quote →
Questions from farmers
Farm solar questions
My farm runs on three-phase. Can you help?
Yes. Most farms with milking, cooling or drying loads are on three-phase, and farm systems are usually much larger than a home system. We survey your shed roofs first, size the system to your daytime load, and handle the G99/NI approval with NIE Networks before we install.S21 See the farm solar worked examples.
Will it work in a power cut?
It can. EcoFlow PowerOcean Plus can keep chosen loads on your farm running in a power cut, with conditions we check at survey. Eleven Energy, coming soon once it is certified in Northern Ireland, will back up chosen essential circuits.S4S12 Tell us what matters to you at survey and we’ll design for it.
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