Solar Panels in Johnswell, Co. Kilkenny
Johnswell is a small town in Co. Kilkenny with a population of around 500. Located 7.5 km from Kilkenny, the area has a solar yield of 905 kWh/kWp. A 4kWp solar system generates approximately 3,620 kWh annually, saving an estimated €1086+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €6,500–€7,200.
Johnswell solar yield and performance data
| Solar Metric | Value |
|---|---|
| Solar Yield | 905 kWh/kWp |
| 4kWp System Output | 3,620 kWh/yr |
| Sunshine Hours | 1,360 hrs/yr |
| Est. Annual Savings | €1086+ |
| Household Coverage | 86% of avg use |
Based on county-level solar data for Kilkenny. Actual output varies by roof orientation, shading, and system specification.
Johnswell at a Glance
| Area Data | Value |
|---|---|
| Population | 500 (Census 2022) |
| Elevation | 146 metres |
| Eircode Area | R95 |
| Dist. to Kilkenny | 7.5 km |
| Location | Inland |
| Coordinates | 52.7013°N, 7.1650°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Oak Park, 24.5 km).
Weather & Climate in Johnswell
Weather data from Met Eireann (Oak Park station, 24.5 km from Johnswell). 5-year average (2019–2023).
Going Solar in Johnswell
Johnswell is a small town in Co. Kilkenny with a population of 500 (CSO Census 2022). It is conveniently close to Kilkenny (7.5 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Johnswell is R95. You'll need your full Eircode when applying for the SEAI grant. The area receives around 1,360 sunshine hours annually, allowing a 4kWp solar system to generate approximately 3,620 kWh per year. The area has relatively low rainfall (867 mm/yr), with a mean temperature of 10.5°C.
Solar panel benefits in Johnswell, Kilkenny
Save on Electricity Bills
Homeowners in Johnswell can save an estimated €1086+ per year on electricity with a 4kWp solar system generating 3,620 kWh annually.
Top Solar County in Ireland
Co. Kilkenny ranks #7 in Ireland for solar yield with 905 kWh/kWp. Homes in Johnswell benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Johnswell today will generate clean electricity for 25-30 years with minimal maintenance.
Johnswell SEAI solar PV grant details
Homeowners in Johnswell, Co. Kilkenny can claim up to €1,800 from the SEAI solar PV grant (2026). Combined with 0% VAT, the net cost of a 4kWp system is typically€6,500–€7,200.
323 SEAI-registered solar installers serve Johnswell, Co. Kilkenny. Compare installers in Kilkenny or read verified reviews.
Solar Installers Serving Johnswell
SEAI registered solar panel installers covering Johnswell, Co. Kilkenny.
Infinite Energy
carlow, dublin, kildare +10 more
House2home Retrofit LTD
carlow, cavan, clare +23 more
Top Rated Solar Installers Near Johnswell
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Solar Panel FAQs for Johnswell
How much do solar panels cost in Johnswell?
A 4.4 kWp system in Johnswell typically costs €8,300–€9,000 before grants. After the €1,800 SEAI grant and 0% VAT, the net cost is €6,500–€7,200. The system generates approximately 3,620 kWh/year, paying for itself in 4-6 years.
Do I need planning permission for solar panels?
Most residential solar installations are exempt from planning permission, provided panels don't project more than 15cm from the roof and don't cover more than 50% of total roof area.
What size solar system do I need for my home in Johnswell?
Most homes in Johnswell benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 86% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
Do I need a smart meter for solar panels?
You need a smart meter to sell surplus electricity back to the grid. ESB Networks installs smart meters for free. Your installer submits the NC6 form to ESB Networks after installation, which triggers the meter upgrade if needed.
How does shading affect solar panels in Johnswell?
Shading from trees, chimneys, or nearby buildings can reduce output significantly. Modern systems use optimisers or microinverters so that shading on one panel doesn't drag down the whole system. Your installer will assess shading during the site survey.
Do I need to clean my solar panels?
In most cases, rain keeps solar panels clean enough in Ireland. If your panels are near trees or at a low angle, an annual clean may improve output by 2-5%. Never use abrasive materials. A soft brush and water is sufficient.
Is my roof suitable for solar panels in Johnswell?
Most roofs are suitable. You need at least 15-20 m² of unshaded roof space for a typical 4kWp system (10 panels). South, east, or west-facing roofs work well. Your installer will assess your roof's orientation, angle, and structural suitability during a site survey.
Can you go off-grid with solar in Johnswell?
Fully off-grid setups are rare in Johnswell. Most homes stay grid-connected and sell surplus back through the Microgeneration Support Scheme. A hybrid inverter with 10-20 kWh of battery storage covers evenings and power cuts, which is what most people searching "off-grid" actually want. A true off-grid system needs a much larger array and battery bank, and you lose the grant-supported export income.
Sources
- SEAI — Solar Electricity Grant
- SEAI — Find a Registered Professional
- Revenue — 0% VAT on Solar Panels
- PVGIS — EU Joint Research Centre (solar irradiance data)
- CSO — Census of Population 2022
- Met Eireann — Climate Data
Last updated: August 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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