10kW Solar System Cost in Ireland: Price, Output and Savings

 

A 10kW solar system in Ireland typically costs between €14,000 and €18,000 fully installed, before any grants are applied. That price covers the panels, inverter, mounting, cabling, commissioning and paperwork. Add battery storage and you’re looking at closer to €19,000 to €27,000.

Most homes with a 10kW system generate roughly 8,500 to 9,500 kWh of electricity per year, which is enough to cover the full annual usage of a large family home and still export a healthy amount to the grid. Payback usually lands between 6 and 8 years, depending on how much of the power you use directly.

This guide breaks down the real numbers behind a 10kW solar system in Ireland, including what pushes the price up or down, what output to expect, and how much you’ll actually save on your electricity bills each year.

How Much Does a 10kW Solar System Cost in Ireland?

 

A 10kW solar PV system in Ireland costs €14,000 to €18,000 installed without battery storage. With a battery of 5kWh to 10kWh included, the total price typically climbs to €19,000 to €27,000. Prices vary based on panel brand, inverter type, roof complexity and whether extras like an EV charger or hot water diverter are added.

Here’s a rough breakdown of where the money goes on a standard 10kW install:

• Panels (around 22 to 25 panels): €6,000 to €7,000
• Inverter (hybrid or string): €3,000 to €3,000
• Mounting, cabling and DC/AC works: €1,500 to €2,500
• Scaffolding and labour: €4,000 to €4,500
• Commissioning, grant paperwork and grid registration: €500 to €1,000
• Optional battery (5kWh to 10kWh): €5,000 to €9,000

Bear in mind, a 10kW system sits at the upper end of domestic installations. It suits larger homes, homes with an EV, or homes with heat pumps and high daytime usage. A smaller solar system cost for three-bedroom properties often makes more financial sense.

What Grants Are Available for a 10kW System?

The SEAI Solar PV Grant caps out at €1,800 for residential installations, and this maximum kicks in at systems of 4kWp or larger. So a 10kW domestic install qualifies for the full €1,800, provided the property was built and occupied before 2021 and the installer is SEAI-registered.

For businesses, the numbers are far bigger. The Non-Domestic Microgen Grant (NDMG) offers up to €162,600 for eligible commercial properties, scaling from €900 per kW down to €150 per kWp for larger systems. A 10kW commercial installation would attract roughly €9,000 under the NDMG.

How the Residential Grant Works

The grant is paid after the install is complete and the BER assessment is submitted. Your installer usually handles the entire application, from the initial paperwork through to grant drawdown. In most cases the grant is deducted from the final invoice, so you never pay the full price upfront.

Extra Financial Perks

• 0% VAT on solar panels for domestic installs, applied automatically at point of sale
• Microgeneration feed-in tariff pays you for surplus electricity exported to the grid
• For businesses, the Accelerated Capital Allowance lets you write off 100% of the system cost in year one

You can check the official grant rates and eligibility on the SEAI Solar Electricity Grant page, which is updated whenever rates change.

How Much Electricity Does a 10kW System Produce?

A 10kW solar PV system in Ireland produces around 8,500 to 9,500 kWh per year under typical conditions. Output depends on roof orientation, pitch, shading and location. South-facing roofs at a 30 to 40 degree pitch deliver the top end of that range. East-west split installations produce slightly less but spread generation more evenly across the day.

Monthly output varies significantly across the year. Expect roughly:

• December to January: 200 to 350 kWh per month
• March to April: 900 to 1,100 kWh per month
• May to July: 1,200 to 1,500 kWh per month
• September to October: 600 to 800 kWh per month

For context, the average Irish home uses about 4,200 kWh of electricity per year, according to figures published by the Commission for Regulation of Utilities. A 10kW system therefore produces roughly double what a standard household consumes, which is why it usually only makes sense for high-consumption homes or homes with plans to add electric heating or an EV.

What Are the Yearly Savings From a 10kW System?

Yearly savings from a 10kW solar system in Ireland typically range from €1,800 to €2,600, depending on your electricity rate, how much you use during daylight hours, and whether you have battery storage. Homes that use most of their solar directly, rather than exporting it, save the most.

Savings come from two sources. First, self-consumed electricity offsets what you’d otherwise buy from the grid at around 35 to 40 cent per kWh. Second, surplus electricity exported to the grid earns a feed-in tariff, usually between 18 and 24 cent per kWh depending on your supplier.

A Real-World Savings Example

Take a family home using 6,000 kWh per year with a 10kW system generating 9,000 kWh:

• Self-consumed: 3,500 kWh at 38c saves €1,330
• Exported to grid: 5,500 kWh at 20c earns €1,100
• Total annual benefit: €2,430

Add a battery and the split shifts. More electricity gets self-consumed in the evening, pushing the savings closer to €2,800 per year. That’s what makes battery storage attractive for larger systems where a lot of the generation would otherwise be exported at a lower rate.

Payback Period

With a net cost around €13,000 to €16,000 after grant and yearly savings of roughly €3,000 to €2,500, most 10kW systems pay for themselves in 6 to 8 years. Systems with batteries take slightly longer to break even, usually 8 to 10 years, but deliver higher lifetime savings.

Is a 10kW System the Right Size for Your Home?

A 10kW system suits homes with high electricity consumption, typically above 6,000 kWh per year, or homes planning to add an EV, heat pump, or air conditioning. For most standard three-bed homes, a smaller 4kW to 6kW system delivers better financial returns because the savings match usage more closely.

Ask yourself these questions before committing to 10kW:

• Do you have a south, east or west-facing roof with roughly 50m² of clear space?
• Is your annual electricity usage above 6,000 kWh?
• Are you planning to add an EV or heat pump within the next few years?
• Does your MPRN have a smart meter fitted for feed-in tariff payments?
• Is your home connected to a single-phase or three-phase supply? Systems over 6kW often require three-phase

If most of your electricity use is in the evening and you have no plans for an EV or heat pump, a smaller system paired with a battery is often the smarter choice. Have a chat with a qualified installer during the quote and site survey stage to size the system properly around your actual usage.

What Affects the Final Price You Pay?

The final price of a 10kW solar install varies by €3,000 to €5,000 depending on several factors. Roof type, panel choice, inverter setup, battery inclusion and site access all move the number. Two quotes for the same system size can look very different once these variables are factored in.

Here’s what pushes the price up or down:

• Roof type: Slate is more time-consuming than tile, adding labour cost. Flat roofs need ballast or mounting frames
• Panel tier: Premium panels with higher efficiency and longer warranties cost more but generate slightly more over 25 years
• Inverter type: Hybrid inverters (battery-ready) cost more than string inverters but future-proof the system
• Scaffolding: Two-storey and three-storey homes need more scaffolding time, adding a few hundred euro
• Cable runs: Long runs from roof to consumer unit push up cost
• Extras: Hot water diverters (like Eddi units), EV chargers, and monitoring add-ons all add to the total

When comparing quotes, always check what’s actually included. Some quotes exclude scaffolding, grant paperwork, or grid registration, which can add hundreds later. A proper quote should be fully inclusive, with a clear breakdown of every component and cost.

Getting the Numbers Right for Your Home

A 10kW solar system is a significant investment, but the numbers stack up for the right home. With annual savings of €1,800 to €2,600 and a payback under a decade, it’s one of the strongest energy upgrades available in Ireland right now, especially with the grant still on the table.

If you’d like an accurate quote based on your roof, your usage and your goals, request a free site survey and we’ll come back with a costed system design within 24 hours.