How Much Does a 15kw Solar System Cost In Ireland?

Joe Brennan
Jul 17, 2025

Thinking about going solar but unsure what a 15kW system might cost you? You're not alone. With rising energy bills and growing interest in sustainable living, many homeowners and small businesses are exploring solar as a smart investment. 

The 15kW solar system cost in Ireland can vary, depending on factors like panel type, installation complexity, and the inclusion of battery storage. Understanding these elements is key to making an informed decision. 

In this blog, we’ll break down everything you need to know — from pricing to potential savings.

Let’s start!

How Much Does a 15kW Solar System Cost in Ireland?

In Ireland, a 15kW solar system generally costs between €15,000 to €25,000 before any government incentives. The final price depends on several factors including the quality of panels, type of inverter, installation complexity, and whether battery storage is included.

While this may seem like a substantial upfront investment, available grants can significantly lower the cost. It's important to consider the long-term savings on electricity bills. If you're planning a larger setup, knowing the typical 15kW solar system cost helps with budgeting and decision-making.

What Appliances Can You Run With a 15kW Solar System?

A 15kW solar system can support a wide range of appliances and electrical loads, making it ideal for medium to large homes or small commercial premises. It can run multiple air conditioners, large kitchen equipment, and even three-phase industrial machinery. 

Systems of this size are designed to handle substantial energy use throughout the day. Provided it's configured correctly with battery storage or grid-tied backup, it can cover peak demands efficiently. The flexibility and output make the 15kW solar system cost worthwhile for high-consumption properties.

What Are The Key Benefits of Installing a 15kW Solar System in Ireland?

Switching to solar power is more than just a way to reduce bills, it’s a smart, long-term investment. Here are the top advantages of choosing a system like this.

Potential Cost Savings on Electricity Bills

Solar panels help you generate your own electricity, reducing reliance on the grid and cutting your monthly bills. This is particularly helpful during daylight hours when solar production is highest. 

Over time, the savings can be substantial, helping to recover your initial investment. For larger households or businesses, the reduced 15kW solar system cost becomes even more justified through regular savings.

Reduction of Carbon Footprint & Contribution to a Greener Environment

Generating electricity from solar power produces zero emissions, making it a clean and eco-friendly energy choice. By installing a solar system, you're actively helping to reduce your environmental impact. 

It supports Ireland’s efforts toward climate goals and encourages a shift away from fossil fuels. This makes solar a responsible choice for environmentally conscious individuals.

Increase Property Value

Homes fitted with solar systems are often seen as more modern, efficient, and desirable by potential buyers. Energy savings and sustainability are appealing features in today’s property market. 

This can lead to a noticeable boost in your home’s resale value. Solar power is increasingly viewed as a long-term asset in the real estate sector.

Long-term Return on Investment (ROI)

Though solar systems require upfront investment, they offer years of consistent energy production. As electricity prices rise, your system’s output helps shield you from future costs. 

The reliability and predictability of solar energy means you’re less exposed to energy market fluctuations. Over time, this results in measurable financial returns.

Conclusion

A 15kW solar system is a strong option for large homes or small businesses looking to cut energy bills and reduce carbon emissions. The cost typically ranges from €15,000 to €25,000 in Ireland, influenced by panel type, installation complexity, and optional battery storage. With available grants and long-term savings, this system offers great value and a reliable return on investment. It can also boost property value and support a greener lifestyle.

Ready to explore your solar options? Contact Going Solar today for expert advice, a free quote, and professional support in installing your 15kW solar system. Let us help you make a smart, sustainable investment.

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Frequently Asked Questions

How much does a 15kW solar system cost in Ireland?

The cost of a 15kW solar system in Ireland typically ranges between €15,000 and €25,000, depending on factors like panel quality, inverter type, and installation specifics. This estimate includes equipment and installation but may vary based on individual requirements.

What factors influence the cost of a 15kW solar system?

Several elements affect the overall cost, including the type and efficiency of solar panels, inverter quality, mounting hardware, labour charges, and additional features like battery storage. Custom configurations and specific site conditions can also impact pricing.

Are there government grants available to reduce the cost?

Yes, the Sustainable Energy Authority of Ireland (SEAI) offers grants up to €1,800 for residential solar PV installations. These grants can significantly offset the initial investment, making solar energy more accessible to homeowners.

How long does it take for a 15kW system to pay for itself?

Typically, a 15kW solar system in Ireland has a payback period of 5 to 7 years. This time frame depends on factors like energy consumption, system performance, and available incentives.

Is a 15kW system suitable for my home?

A 15kW system is generally ideal for larger homes with higher energy demands or properties aiming for significant energy independence. Assessing your household's energy consumption and available roof space can help determine suitability.

How can Going Solar assist with my 15kW solar installation?

At Going Solar, we provide comprehensive services, including site assessment, system design, installation, and after-sales support. Our team ensures a smooth transition to solar energy, customised to your specific needs.

Contact Going Solar Now!

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*FYI, parts of this blog post were drafted by artificial technlogy. But rest assured, it's been thoroughly researched, edited, reviewed and me & my team.
Author Fahad Zahid
Founder @ Going Solar

Joe Brennan, the founder of Going Solar, is dedicated to making solar power mainstream in Ireland and meet SEAI objectives. With a focus on affordability and sustainability, he is bringing renewable energy solutions to homes, reducing costs & environmental impact.