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 781 kWh/kWp. A 4kWp solar system generates approximately 3,124 kWh annually, saving an estimated €937+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
Johnswell solar yield and performance data
| Solar Metric | Value |
|---|---|
| Solar Yield | 781 kWh/kWp |
| 4kWp System Output | 3,124 kWh/yr |
| Sunshine Hours | 1,360 hrs/yr |
| Est. Annual Savings | €937+ |
| Household Coverage | 74% of avg use |
Solar yield calculated for Johnswell (52.70°N, 7.17°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Johnswell
kWh per month (4kWp system)
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. Based on satellite data for this location, a 4kWp solar system generates approximately 3,124 kWh per year (781 kWh/kWp). 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 €937+ per year on electricity with a 4kWp solar system generating 3,620 kWh annually.
SEAI Grant: Up to €1,800
Get up to €1,800 back from SEAI. The grant is available for homes built before 2021. No means testing. Apply online at seai.ie.
0% VAT on Installation
Residential solar installations are zero-rated for VAT since May 2023, saving approximately €1,000 on a typical system.
Earn from Excess Energy
Sell surplus electricity at 15-25c/kWh through the Microgeneration Support Scheme. The first €400/year is tax-free.
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 apply for the SEAI solar PV grant. The maximum grant of €1,800 is confirmed for 2026.
| System Size | Grant Amount | Typical Net Cost |
|---|---|---|
| 2 kWp | €1,400 | €2,000 - €3,000 |
| 3 kWp | €1,600 | €2,500 - €4,000 |
| 4 kWp+ | €1,800 (max) | €3,200 - €6,200 |
Solar Installers in Kilkenny
SEAI registered solar panel installers covering Kilkenny.
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Solar Panel FAQs for Johnswell
How much do solar panels cost in Johnswell?
A 4kWp system in Johnswell typically costs €5,000-€8,000 before grants. After the €1,800 SEAI grant and 0% VAT, the net cost is €3,200-€6,200. 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 74% 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.
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: March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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