Solar Batteries in Ireland: How to Choose the Right Size
Usable capacity, power rating and warranty terms to check before choosing a battery size.
Read guideSolar Panels in Ireland
An independent guide to solar panels and solar PV systems for homes in Ireland: suitability, cost, grants, generation, batteries, exporting electricity, payback and how to compare quotations properly.
Independent information, not linked to any installer
Grants and rules explained in plain English
How it works
Your solar PV journey
Four steps to help you make an informed decision, in your own time.
Research your options
Understand suitability, costs, grants and installation.
Understand the cost
Review likely costs and available grants before requesting quotations.
Browse installers
Search the SEAI register and compare local installers.
Contact installers directly
Request and compare quotes from your chosen installers.
Upgrader provides independent information and tools. We do not arrange quotations or recommend individual installers.
Solar PV
What this guide covers
Solar panels are one of the most visible home upgrades that people in Ireland are considering, and one of the easiest subjects to find generic or repeated information about. This guide sets out what actually matters when deciding whether solar PV suits your home, what a system involves, what current grants and rules apply, and how to compare quotations properly once you are ready to talk to installers. It also includes our own solar calculator, so you can turn these general points into an indicative cost and payback estimate for your own home.
Suitability
Is solar PV suitable for your home?
Not every roof is a good candidate for solar PV, and a few basic factors will tell you a lot before you contact anyone.
- Orientation. South facing roofs capture the most sunlight, though east and west facing roofs can still generate well, often as two smaller arrays. See our guide to east and west facing roofs for more on how a split array actually performs.
- Pitch. A pitch of around 30 to 40 degrees is close to ideal in Ireland, though most ordinary roof pitches still work well.
- Shading. Chimneys, trees, nearby buildings and aerials can shade panels at certain times of day, cutting output by more than the shaded area alone would suggest.
- Available roof space. Usable area, once corners, vents and skylights are allowed for, sets the largest system that will fit.
- Roof condition. A roof needing its covering replaced soon is usually better dealt with first, since refitting panels later adds cost.
Suitability check
None of these factors rule solar out on their own. A reputable installer will normally confirm suitability with a proper site visit or a satellite based assessment before quoting.
The basics
What does a solar PV system include?
A typical home solar PV system is made up of a small number of components working together.
Panels
Panels, also called modules, sit on the roof and convert sunlight into direct current electricity. Systems are described by their total capacity in kilowatt peak, or kWp.
Inverter
An inverter converts the direct current electricity from the panels into the alternating current electricity used in the home, and is usually fitted in an attic, garage or utility area. Grid connected inverters also switch off automatically during a power cut, which our guide to what happens to solar panels during a power cut explains in full.
Mounting and cabling
Mounting rails fix the panels to the roof structure, with cabling and a dedicated isolator connecting the system safely to the home's electrics.
Generation meter and monitoring
A generation meter, and in most cases an app or a display in the home, let you see how much electricity the system is producing.
Battery (optional)
A battery is not part of every system. It stores surplus electricity generated during the day for use later, and is covered in its own section further down this page.
Cost
How much do solar panels cost?
The cost of a solar PV system in Ireland depends on several factors, so our solar calculator below gives a researched indicative cost range for common system sizes rather than a single figure. What we can tell you here is what actually drives the price you will be quoted.
- System size. Larger systems cost more overall, but usually cost less for each kWp of capacity.
- Equipment. Panel and inverter brand, tier and warranty length all affect price.
- Battery. Adding a battery is a substantial additional cost on top of a panel only system.
- Roof complexity. Roof height, access and whether scaffolding is needed all affect labour cost.
- Electrical work. Some homes need a consumer unit upgrade or other electrical work alongside the solar installation.
Indicative ranges, not a quotation
Our Solar Cost and Payback Calculator gives a researched indicative cost range for common system sizes and battery capacities. It is not a quotation. Actual prices depend on your system size, battery, specific equipment, roof complexity, access and any electrical work needed, and can only be confirmed by comparing written quotations from installers.
Grants
Solar PV grants
The main financial support for home solar PV in Ireland is the SEAI Solar Electricity Grant. Based on currently published SEAI guidance:
- The grant is calculated at €700 per kWp for the first 2kWp of a system, then €200 per kWp up to a 4kWp limit, giving a maximum grant of €1,800.
- Support only applies to the first 4kWp of a system. A larger system can still be installed, it simply will not receive extra grant support beyond that point.
- Since 6 October 2026, the home must have been built and occupied before 2025, where the previous cut off was before 2021, and have an MPRN with no previous Solar PV grant funding.
- A separate flat rate grant of €600 is now available for a home battery of 5kWh or larger, applied for together with solar PV or on its own. See the SEAI battery storage grant for the conditions.
- The installation must be carried out by a solar PV installer registered with SEAI.
- Grant approval needs to be confirmed before work starts, so the usual order is get quotes, apply for a grant offer, then proceed once that offer is in place.
- A Building Energy Rating assessment completed after the works, by an assessor registered with SEAI, is required before the grant is paid. There is currently no minimum rating that the home needs to achieve.
- Since May 2023, the combined supply and installation of solar panels for a private home in Ireland has qualified for the zero rate of VAT, based on Revenue guidance. Buying panels only, without installation, is charged at the standard VAT rate.
Check your own eligibility
Eligibility also depends on factors such as when the home was built and occupied, and whether a grant has already been used at the address. For the other grant changes that took effect on 6 October 2026, see our guide to new SEAI grants from October 2026. Because scheme details can change, always confirm your own eligibility and the current grant amount directly with SEAI before assuming a grant applies to your home.
Generation
How much electricity can solar PV generate in Ireland?
How much electricity a system generates depends on its size, orientation, pitch and shading, but SEAI's own homeowner guidance gives a useful reference point. A well positioned 3kWp system is guided to generate around 2,600kWh of electricity a year in Ireland, equivalent to more than 40% of a typical home's annual electricity use.
Generation is highly seasonal. Most of a system's annual output is typically produced in the brighter months from April to September, since panels only generate during daylight hours and Irish daylight is shorter and weaker in winter. This pattern matters when thinking about how much of your own generation you can actually use, and whether a battery could help, covered next.
Results vary by home
Orientation, pitch, shading, panel efficiency and the specific weather in a given year can all move actual generation up or down from any guide figure. Treat this as a starting reference, not a prediction for your own roof.
System size
Choosing the right system size
It is tempting to assume that a bigger system is always better, but that is not automatically true. A system that generates far more electricity than a home ever uses will export a large share of its output, and export income is generally lower than the value of electricity you use directly yourself. The SEAI grant also only supports the first 4kWp of a system, so a much larger system costs more without extra grant support.
A more useful starting point is your own household electricity consumption, ideally checked over a full year to capture seasonal variation, and when in the day you tend to use the most electricity. A good installer should be able to talk through appropriate sizing for your usage, rather than defaulting to the largest system your roof can fit.
Batteries
Solar batteries
A battery stores surplus electricity generated during the day so it can be used later, typically in the evening when a household's electricity use is often highest but generation has stopped.
A battery is not automatically worthwhile for every household. It tends to help most where you are often out during the day and would otherwise export most of your generation. It makes less difference where you are home during the day and already use most of what you generate.
Capacity, cost, warranty and your electricity tariff all affect whether a battery is worthwhile in your case. See our full guide to choosing the right battery size for usable capacity, tariffs, warranties and what to compare between quotations.
Since 6 October 2026, SEAI offers a flat €600 grant towards an eligible battery of 5kWh or larger, with a grant offer needed before installation. It covers part of the cost rather than all of it. Our guide to the SEAI battery storage grant explains who qualifies and how to apply.
Exporting electricity
Selling electricity back to the grid
Electricity your system generates but your home does not use can be exported to the grid. Under the Clean Export Guarantee, a framework set by the Commission for Regulation of Utilities, electricity suppliers are required to pay customers for electricity they export beyond their own use.
The regulator sets the framework, but each electricity supplier sets its own export rate, and rates vary between suppliers and change over time. Because of this, we are not quoting specific supplier rates on this page. Check current export rates directly with your own electricity supplier, or compare suppliers when choosing one; our electricity guide explains how export payments appear on your electricity plan.
A smart meter records the amount of electricity you export and allows your supplier to pay you based on actual exports. Some eligible homes without a smart meter may instead receive a payment based on a calculated deemed export amount. Check the current arrangements with your electricity supplier.
Next steps
Want to see what this could mean for your own home?
Run the solar calculator below for an indicative cost and payback based on your own roof, or if you already feel informed enough to take the next step, search for solar PV installers in Ireland now.
Payback
Solar PV payback
You will see plenty of confident claims online about solar panels paying for themselves in a fixed number of years. Treat any single number with real caution, because payback depends on several things at once, and changing any one of them can move the result significantly.
- Installation cost, and how much of that is offset by a grant.
- How much electricity the system actually generates on your specific roof.
- How much of that generation you use directly in your home, rather than exporting it.
- Your electricity unit price, which affects how much each unit of electricity you use yourself is worth.
- The export rate your supplier pays for surplus electricity.
- Whether a battery is included, and what it cost.
Rather than give you another single number, we built the solar calculator below so you can work from an indicative installation cost through to an indicative payback, changing the assumptions yourself along the way.
Upgrader.ie original tool
Solar Cost and Payback Calculator
Step 1 gives you an indicative installation cost range, before and after the SEAI grant. Step 2 carries that figure into an indicative annual benefit and payback, and you can edit any figure along the way, or replace the estimate with your own quotation.
How to use this calculator
Estimate your installation cost
Select your proposed system size, battery option and grant eligibility to see an indicative cost range.
Add your household figures
Use your electricity bill to enter your unit price and adjust the generation, self-use and export assumptions.
Review your result
See the estimated cost, grant, annual electricity benefit and indicative payback, then compare the result with actual installer quotations.
What to have ready
- Your latest electricity bill.
- Approximate annual electricity use, if available.
- An existing Solar PV quotation, if you have one.
- An idea of whether you want a battery.
Estimate installation cost System size, battery and grant eligibility
Estimate benefit and payback Generation, self-use, unit price and export rate
Figures below are carried in from Step 1. Every field can be edited, and you can find your unit price and export rate on your latest electricity bill or your supplier's website.
Assumptions and sources
What this estimate includes, how the figures are calculated, and where they come from.
What the estimate includes
Panels, a standard inverter, mounting, cabling, a generation meter and monitoring, and installation labour. A battery is included only if you selected one in Step 1.
Not included: difficult access or unusual scaffolding, a consumer unit upgrade or other electrical work, roof repairs, and the post works Building Energy Rating assessment. These can all add to the price an installer actually quotes you.
How the figures are calculated
Grant: €700 per kWp up to 2kWp, then €200 per kWp for each additional kWp up to 4kWp, capped at €1,800 (2026 rate). Only applied if you have indicated you expect to be eligible. The separate €600 battery storage grant is not included in this calculator, which covers the Solar PV grant only. If you add an eligible battery of 5kWh or larger, deduct that €600 separately from the cost after grant.
Grant eligibility, per SEAI
- Home built and occupied before 2025
- Has an MPRN, with no previous Solar PV grant funding used at that MPRN
- Grant approval in place before work starts, with 8 months to complete the work and submit the required documentation once approved
- Installed by a registered Solar PV contractor
- A post-works BER assessment is required
Cost and generation: cost ranges for 2, 4 and 6kWp systems are indicative installed costs before grant, benchmarked primarily against SEAI’s published median installed costs from 21,764 completed home energy upgrades between January and June 2025 (about €8,153 to €9,120 for Solar PV up to 4kWp and about €9,400 to €10,876 above 4kWp, for typical house types), with independent Irish solar pricing publishers used as secondary context. Battery ranges are based on the independent publishers listed. Generation is scaled from SEAI guidance for a well positioned 3kWp system. Both are indicative, not a quotation. Battery ranges are the extra cost of adding a battery as part of a new installation, not a standalone retrofit, and sources vary widely, so the ranges are deliberately broad.
Sources and information date
Grant and VAT
- SEAI: Solar Electricity PV Grant (opens in a new tab)
- SEAI: Battery Energy Storage System Grant (opens in a new tab)
- Citizens Information: Grants for solar panels (opens in a new tab)
- Revenue: VAT on solar panels (opens in a new tab)
Cost research
Primary benchmark: SEAI published median installed costs, January to June 2025 (21,764 completed upgrades). Secondary context:
- EnergyHero: 2kW solar system cost in Ireland (opens in a new tab)
- Get Solar Panels: Solar panel costs in Ireland by system size (opens in a new tab)
- SolarInfo.ie: Solar battery storage costs in Ireland (opens in a new tab)
- Energia: Are solar panel batteries worth it in Ireland? (opens in a new tab)
- EnergyHero: Solar battery cost in Ireland (opens in a new tab)
- Going Solar: 10kW solar battery price in Ireland (opens in a new tab)
Information checked: 7 October 2026. Grant amounts, VAT treatment and market pricing can change. Always confirm current figures with SEAI, Revenue and your own installer quotations.
Planning
Planning considerations
Since October 2022, planning rules for domestic rooftop solar in Ireland have been significantly relaxed. Based on current regulations:
- Homes generally no longer face an area limit for rooftop solar. Panels can cover the whole roof without needing planning permission, in most cases.
- An exception applies within 43 designated solar safeguarding zones, mostly around airports, aerodromes and other sites with helipads, where installations above 300 square metres need planning permission, due to aviation safety considerations around glare.
- Protected structures, proposed protected structures, and buildings within an architectural conservation area are treated differently. Work that would materially affect the character of the structure or area is not automatically exempt, and may need planning permission or a formal exemption declaration from the local council.
When in doubt, ask first
Planning rules can be technical and site specific. If your home falls into any of the categories above, or you are simply unsure, check with your local planning authority before proceeding.
Installation
What happens during installation?
A realistic overview of the journey from quotation to a working system.
Every project varies, but most home solar PV installations in Ireland follow a broadly similar sequence, from an initial site assessment through to a working, monitored system. Before work starts, it is also worth checking how your home insurer will treat the new installation. Our guide to home insurance for solar panels explains what to ask.
1
Quotes and site assessment
Get quotes from more than one installer, ideally including a proper site visit or a satellite based survey rather than a price given over the phone.
2
Grant application
Once you have chosen an installer and a system, a grant application is made to SEAI and confirmed before work begins.
3
Notifying ESB Networks
Your installer arranges the required notification to ESB Networks, since most home systems, generally up to 6kVA on a standard single phase supply, connect through a straightforward process.
4
Installation day
Panels, mounting and cabling are fitted, often within a day or two for a typical home system, followed by the inverter and any battery.
5
Electrical work and testing
The system is wired into your home's electrics, tested, and switched on.
6
Post works BER
A Building Energy Rating assessment is completed after the works and published, which is required before your grant is paid.
7
Ongoing monitoring
Most systems include an app or a home display, so you can see what the system is generating over time.
Comparing quotations
How to compare solar PV quotations
Two quotations for what looks like a similar system can vary a lot in price, and the difference is often explained by what is, and is not, included. Before comparing prices, make sure you can answer the following for each quotation.
Total system size. The total capacity in kWp, not just the number of panels.
Panel number and wattage. How many panels, and the wattage of each one.
Panel manufacturer and model. The specific product being installed, not just a general description.
Inverter manufacturer and model. The brand and model, and whether it is a string or a micro inverter.
Battery capacity. The usable capacity in kWh, if a battery is included, plus its brand and model.
Warranties. What is covered, for how long, on the panels, the inverter, any battery, and the installer's own workmanship.
Mounting equipment. What roof mounting system is used, and whether it suits your specific roof type.
Scaffolding. Whether scaffolding or other access equipment is included in the price, or charged separately.
Monitoring. Whether an app or a home display is included.
Electrical work. Whether any consumer unit upgrade or other electrical work is included.
Grant treatment. Whether the price shown is before or after the SEAI grant, and whether VAT is included.
BER. Whether arranging the post works Building Energy Rating assessment is included in the price.
ESB Networks paperwork. Whether the installer is handling the required notification to ESB Networks.
What is excluded. Ask directly what is not included, since this is where unexpected costs usually come from.
No rankings or recommendations
Upgrader.ie does not rank, rate or recommend individual installers. This checklist is here to help you ask the right questions and compare answers, not to tell you which company to choose.
FAQ
Frequently asked questions
Do I need planning permission for solar panels?
Since October 2022, most homes in Ireland can install rooftop solar panels without planning permission, and there is generally no limit on the roof area that can be covered. Exceptions apply within designated solar safeguarding zones near airports and similar sites, and for protected structures or buildings in an architectural conservation area. See Planning considerations above.
Do I need a battery with my solar PV system?
Not necessarily. A battery tends to be more worthwhile for a household that is often out during the day and would otherwise export most of its generation. It tends to make less difference for a household that is home during the day and already uses most of what it generates. See Solar batteries above.
How much is the SEAI grant for solar panels?
Based on current SEAI guidance, the grant is calculated at €700 per kWp for the first 2kWp, then €200 per kWp up to a 4kWp limit, giving a maximum grant of €1,800. Always confirm the current amount and your own eligibility directly with SEAI.
How long does a solar PV installation take?
The physical installation is often completed within a day or two for a typical home system. The overall process, including grant approval, notifying ESB Networks and completing a Building Energy Rating assessment after the works, generally takes longer.
Does Upgrader.ie install solar panels?
No. Upgrader.ie is an independent information resource. We do not install solar PV systems, and we do not currently have installer partnerships.
Does the Upgrader.ie solar calculator give me a quotation?
No. The Solar Cost and Payback Calculator gives an indicative cost range and an indicative payback estimate based on published pricing, SEAI guidance and the figures you enter. It is not a quotation, and you can replace the estimated cost with your own quotation at any point.
Latest data
What the latest figures suggest
10,000+
Solar PV grant applications, Q1 2026
Department of Climate, Energy and the Environment, 21 April 2026
Demand is accelerating
More than 10,000 applications for the SEAI Solar PV grant were processed in the first quarter of 2026 alone, up 65 percent on the same period in 2025, according to the Department of Climate, Energy and the Environment. At a maximum grant of €1,800 per application, that quarter of activity represents a significant volume of installer work moving through the system. It suggests that the practical questions covered on this page, suitability, sizing, batteries and comparing quotations properly, are relevant to a fast growing number of households right now, not a small group of early adopters.
Related Guides
Related guides
Go deeper on some of the questions covered above.
What Happens to Solar Panels During a Power Cut?
Why a grid connected system switches off in a power cut, and what backup power would need.
Read guide
East and West Facing Roofs for Solar PV
How a split east and west array changes generation timing if your roof does not face south.
Read guide
Next steps
Ready to put a number on your own roof?
Run the solar calculator for an indicative cost and payback, or if you already feel informed enough to take the next step, search for solar PV installers in Ireland and contact the ones that interest you directly.
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Browse companies registered with SEAI for this upgrade
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Review company details before you get in touch
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Contact installers directly, with no obligation and no middleman
Upgrader.ie is an independent information resource. We do not currently have installer partnerships, and listing a company does not imply endorsement or vetting. See Our Partnerships.