Solar Panels in Derry
County Derry's northwest position means slightly lower sunshine hours than eastern counties, but solar panels remain a strong investment. A 4kWp system generates approximately 3,340 kWh per year. Derry City and the Foyle basin benefit from lower rainfall than the surrounding mountains, creating favourable conditions for solar generation.
Solar generation statistics for Derry
Solar Yield
4kWp Output
Sunshine
Rainfall
Household Coverage
Benefits of Solar Energy in Derry
Save on Electricity Bills
A 4kWp solar system in Derry generates approximately 3,340 kWh per year, covering 80% of average household use and saving an estimated €1002+ annually.
SEAI Grant — Up to €1,800
Get up to €1,800 back from SEAI for your solar installation. The grant is available for homes built and occupied before 2021. No means testing — it's property-based.
0% VAT Saves ~€1,000
Since May 2023, residential solar panel installations are zero-rated for VAT. This saves approximately €1,000 on a typical installation compared to the old 13.5% rate.
Earn from Excess Energy
Sell surplus electricity back to the grid at 15-25c/kWh through Ireland's Microgeneration Support Scheme. The first €400/year of export income is tax-free.
Strong Year-Round Performance
While Derry may see more cloud cover, solar panels still perform well here. Longer summer days at this northern latitude boost generation, and cooler temperatures improve panel efficiency.
Increase Property Value
Solar panels improve your BER rating and can increase your property value by up to 4%. Buyers increasingly look for energy-efficient homes with lower running costs.
25+ Year Lifespan
Modern solar panels last 25-30 years with minimal maintenance. In Derry, a typical system pays for itself in 4-6 years, leaving 20+ years of near-free electricity.
Solar panel grants in Derry
The Sustainable Energy Authority of Ireland (SEAI) offers grants for homeowners in Derry to install solar PV panels. The grant was confirmed at €1,800 maximum 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 |
Net costs include 0% VAT. Actual costs vary by installer and roof type. All prices are after SEAI grant deduction.
Typical 4kWp System Cost Breakdown
Based on average 4kWp installation costs in Derry. Actual costs vary by installer and roof type.
Solar Installers in Derry
SEAI registered solar panel installers covering Derry.
Find Solar Installers in Derry
Browse SEAI-registered solar panel installers covering Derry. Compare reviews and get quotes.
Solar Panels in Neighbouring Counties
Explore solar panel information for counties near Derry.
Frequently Asked Questions About Solar Panels in Derry
How much do solar panels cost in Derry?
A typical 4kWp solar panel system in Derry costs between €5,000-€8,000 before the SEAI grant. After the €1,800 grant and with 0% VAT, the net cost is typically €3,200-€6,200. The system generates approximately 3,340 kWh per year, paying for itself in 4-6 years.
How much electricity will solar panels generate in Derry?
Derry receives approximately 1,175 sunshine hours per year. A standard 4kWp system generates around 3,340 kWh annually — covering 80% of average household electricity consumption (4,200 kWh/year).
Are solar panels worth it in Derry?
Yes. At 835 kWh per kWp, solar panels in Derry generate significant returns. With the €1,800 SEAI grant, 0% VAT, and electricity savings of approximately €1002+ per year plus export income, a typical system pays for itself in 4-6 years and lasts 25+ years.
Does Derry get enough sun for solar panels?
Ireland receives enough solar radiation for panels to work effectively year-round. Derry gets around 1,175 sunshine hours per year with approximately 930mm of annual rainfall. Solar panels also generate electricity on cloudy days — just at reduced output. Germany, which has similar sunshine levels to Ireland, is one of the world's largest solar markets.
How long does solar panel installation take?
Most residential installations are completed in 1-2 days. The full process — from SEAI grant application to completed installation — typically takes 4-8 weeks. You must receive your SEAI Letter of Offer before any work begins.
Do I need planning permission for solar panels?
Most residential installations are exempt from planning permission, provided panels don't project more than 15cm from the roof surface and don't cover more than 50% of total roof area. Listed buildings and conservation areas may require permission.
Can I sell excess electricity back to the grid?
Yes. Under Ireland's Microgeneration Support Scheme, you sell surplus electricity at 15-25c per kWh depending on your supplier. You need a smart meter (ESB Networks installs these for free). The first €400/year of export income is tax-free.
How do I apply for the SEAI solar grant in Derry?
Apply online at seai.ie. You need an SEAI-registered installer, your MPRN (from your electricity bill), and your Eircode. Do not start work before receiving your Letter of Offer. After installation, a BER assessment is required. The grant is paid directly to your bank account within 4-6 weeks.
Sources
- SEAI — Solar Electricity Grant
- SEAI — Find a Registered Professional
- SEAI — Microgeneration Statistics
- Revenue — 0% VAT on Solar Panels
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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