Solar Panels in Dublin and Cork: What to Expect Year-Round

If you're thinking about installing solar panels in Dublin or Cork, you’re probably wondering just how much sunlight Ireland actually gets and how that translates into usable solar energy. The good news? Despite our famously cloudy skies, solar panels perform far better in Ireland than many expect.

In this guide, we break down solar output in Dublin and Cork, what it looks like across the seasons, and how much energy you can realistically expect from your system year-round.

How Much Sun Does Ireland Really Get?

Ireland may not be a Mediterranean hotspot, but thanks to long daylight hours in spring and summer and advances in solar PV technology. Solar power systems here are efficient and increasingly popular.

On average:

• Cork receives about 1,100–1,200 kWh/m²/year of solar irradiation
• Dublin sees roughly 1,000–1,100 kWh/m²/year

This means even in the east where it's slightly cooler and cloudier, solar panels in Dublin still generate a meaningful return.

Solar Output in Cork

With a slightly warmer, sunnier, and less overcast climate, Cork generally outperforms Dublin in solar production. Expect annual solar output from a typical 4kWp system to be around:

• 3,800–4,200 kWh/year

This could cover up to 60–70% of an average home’s electricity use, depending on your household size and energy habits.

Best output months: May, June, July
Lowest output months: December and January

With a south-facing roof, Cork homeowners can maximise yield and savings. And when paired with a battery, you can store extra power to use after sunset.

Solar Output in Dublin

Dublin's solar potential is slightly lower than Cork’s but still excellent for residential solar systems. A well-placed 4kWp system will typically generate:

• 3,600–4,000 kWh/year

This is enough to slash your electricity bill and cut your carbon footprint dramatically.

Best output months: April to August
Lower (but still useful) months: November to February

Modern solar panels perform well in diffused light, and with smart inverters and battery storage, Dublin homeowners can easily boost their solar self-consumption.

Understanding Solar Seasons in Ireland

Solar production varies widely throughout the year. Here’s a quick look at how the seasons affect solar energy output:

Spring (March–May)

• Days are getting longer, sunlight is stronger.
• Excellent output can exceed 400 kWh/month on a 4kWp system.

Summer (June–August)

• Peak season for solar production.
• Your panels could generate up to 600–700 kWh/month.

Autumn (September–November)

• Declining light, but still moderate output in September and October.
• Battery storage becomes more useful in later months.

Winter (December–February)

• Shorter days, lower sun angle.
• Expect around 150–250 kWh/month from a 4kWp system.
• Still valuable for offsetting daytime usage or storing excess with a battery.
  
  

How to Maximise Solar Performance Year-Round

No matter where you live in Ireland, you can optimise your solar system with a few smart choices:

• South or southwest-facing panels for maximum exposure
• Battery storage to save surplus power for nighttime use
• Smart meter for better time-of-use savings
• SEAI grant to offset the upfront cost of your installation

At WattCharger, we install solar systems designed specifically for Irish conditions, tailored for the unique weather patterns of Cork, Dublin, and everywhere in between.

Final Thoughts: Is Solar Worth It in Dublin or Cork?

Absolutely. Solar panels work in Ireland and work well. With solar output in Cork and Dublin averaging around 3,600–4,200 kWh/year, homeowners can see strong savings, reliable energy, and a more sustainable future.

Whether you want lower bills, more energy independence, or to reduce your carbon footprint, WattCharger can help you design the ideal system for your home.

Ready to Explore Solar?

Contact us at WattCharger today for a free, no-pressure consultation. Discover how much you could save with a solar system built for Irish homes year-round.