PureVolt installation of Solar Panels on a house in Dublin

Solar Panel Calculator How many panels will fit on your roof, and how much electricity will they make? Size, orientation, money savings and more.

Want to do your own solar calculations?

Then our solar PV calculator is designed for you.

You see how many solar panels might fit on your roof, how orientation affects the output, how much electricity you can expect per year from solar and more.

Or we can do the numbers for you

Just to say you can call or message us any time and we'll gladly do all the numbers for your house for you. This is just a tool we wanted to build for those who wish to have a play themselves.

Solar Calculator for Ireland

Prefilled to get you started

We've prefilled this with a 12-panel array in a 6 x 2 layout to get you started, which is one of the most common solar installation sizes. We've also popped in all the other standard numbers for Ireland.

Adjust any figures you like and see the outputs adjust automatically. Happy designing.

1. The layout of your panels
Panel Count:
2. The dimensions of your solar panels

These are based on standard panel values, but feel free to play around if you are looking at something specific by showing advanced calculation settings.

Panel array dimensions:
3. What size of roof is needed for these panels?
Easy way to measure this
Roof footprint required: measuring horizontally at ground level. Much easier to measure!
4. The power your solar panels could generate
Total solar array kWp:
Annual units generated: For comparison: average annual household consumption in Ireland is 5106 kWh (source: SEAI)
Annual CO2 emissions saved:
5. SEAI Grant

Grants apply for homes built & occupied before 31st December 2020 or before. There is no grant for homes built after that.

SEAI Grant:
 
6. The money you could save

Default rates here are Electric Ireland's "Home Dual+" plan. Feel free to adjust to your own tariff by showing advanced calculation settings.

Annual bill savings:
Use the Solar Calculator to update these totals

Your key figures:

Roof footprint required:
System size:
Annual units generated:
Annual CO2 emissions saved:
SEAI Grant:
Annual bill savings:

Tips & explainers

Simplified for ease

We have purposely over-simplified this to make it a bit more usable. The tools we use ourselves when we are producing solar quotes are much more complicated and take many more factors into account.

That said this tool covers all the major factors, and certainly should give you a good indication of things like the effect of roof slope, panel orientation, which county you are in and alike on potential solar electricity generation & savings on your electricity bill.

Spacing around solar panels

Solar panels (generally) are not allowed to go right up to the edge of your roof. There must be a space left around the panel array.

Horizontal space required

There must be a 50cm space between the edge of your panels and any open edge of a roof. If though, your house is semi-detached or on a terrace, then you do not need to leave this space on the adjoining side. You can go right up to the dividing wall of any adjoining property.

Vertical space required

There must be a space of 20cm between the top of the panels and the ridgeline. Below the panels must be a space of 50cm before the edge of the roof.

Roof angles

A typical roof slope here in Ireland is 25° to 30°

Easy way to measure roof angle

A very easy trick to measure roof angle is to use your phone. On an iPhone or Android phone, you can just open Google, type "spirit level", then put the edge of your phone against the inside of your roof, and it will show you the angle.

Quick way to check roof angle: Google search "spirit level", then hold your phone against the beam. Works on android & iPhone, no app required.

Google spirit level on a phone, held against a roof beam

Measuring roof size

Your roof footprint

Our solar calculator gives you the horizontal distances required instead - the footprint of your roof. We've done the trigonometry for you.

The footprint is much easier for you to measure then measuring the distance down the slope of your roof. Just measure the distance horizontally a ground level, from below your ridgeline to below the guttering. Check that measurement in the calculator, and you'll have a good idea how many panels will fit on your roof.

Using Google Maps

Another easy way to measure the footprint of your roof is on Google Maps.

Using the satellite view (located at the bottom-left of Google Maps).

Map of installs across Ireland

Right-click on one end of your roof, then click on "measure distance", and click on the other end, and it will tell you the distance between the two points.

Map of installs across Ireland

In this case, the distance between point 1 and point 2 measures 9.17 meters, or 30.09 feet. In our experience, it's pretty accurate, usually to within 10 or 20cm.

Panel power in Wp

Panels are generally quoted by their Watt peak value. When someone talks about their "435 panels", that means typically those panels are 435 Watts peak.

Peak?

A 435 Wp panel would put out 435 W of power in perfect conditions. That's what the "peak" bit means, this is the maximum that panel would produce. Don't worry, our calculations know it's not always ideal conditions and take that into account in their predictions.

435Wp is our typical power of panels at the moment, but feel free to play with that number should you be looking at other panel sizes.

Get a solar quote

Use this quick and easy form to get things started. Click here to find out how we will generate your quote. Just need some ballpark figures for now? You can find illustrative example quotes here...



Thanks, your quote request has been sent!

Pat MonahanJune 2024
Overall, great experience with PureVolt I had an overall great experience with PureVolt Solar in relation to a recent install of a PV system. From the initial consultation and site visit, to install and operation of the system, the entire team was efficient and excellent. Once install was completed the team also took care of all relevant forms required for the grant and NC6 making the whole process a simple, straight forward, hassle free experience.
Reviewed on Google
Borja Blanco IglesiasJune 2024
Reviewed on Google
Nathy O'ConnellMay 2024
Top class service from start to finish!Top class service from start to finish! 10.5kwh Peak Array, 5.2kwh Sungrow Hybrid inverter, 19.2 Kwh Battery Storage on DC side. The pure volt team had amazing communication from the consultation design stage , to the install team who were very professional and courteous when on site . The installation was very tidy and looked like people who took pride in their work . Would recommend to anyone.
Reviewed on Google
Declan RocheMay 2024
Reviewed on Google
Graeme PartridgeMay 2024
Professional, friendly and knowledgable teamSystem installed April 2024. Professional, friendly and knowledgable team. I have no problems recommending PueVolt Solar.
Reviewed on Google
Shane EganMay 2024
Competitive with no hidden extrasThis is a very simple review - if you need to find out some useful info about the benefits and return on investment details of solar you won't find a better website than purevolt.ie. From our own personal experience of then choosing them for our install it was entirely positive - We got 3 quotes and there's was the most competitive with no hidden extras. It was a tricky enough set up over two locations which was handled efficiently and on time over two days with no mess and no fuss. From the design guys to the installers/electricians and the background office staff everyone was a pleasure to deal with and they really know their stuff. We would have no hesitation in thoroughly recommending PureVolt to anyone considering solar power.
Reviewed on Google
John DalyMay 2024
Good value and exceptional serviceIf you're 'still thinking about' investing in solar panels and/or not sure who to go with, look no further than PureVolt Solar: good value and exceptional service from start to finish. And, as a bonus, they're lovely people! They've recently completed an installation for me and I couldn't be happier.
Reviewed on Google
Pierce KennedyApril 2024
Good price, fast, and high quality.Great service from Purevolt. Good price, fast and high quality install. Couldn’t fault them
Reviewed on Google
Emily ChurchApril 2024
Would highly recommend Purevolt!I’m so happy we went with Purevolt for our solar panels. Everyone we dealt with was extremely helpful and communication was brilliant, and we never felt like we were being pressured to buy a bigger or more complex system than what we wanted. The install itself was great, the guys arrived on time and were happy to answer all our questions, and did a great job cleaning up after too! Kelly was particularly helpful too with answering my questions and helping with the grant process. Would highly recommend purevolt for anyone considering solar!
Reviewed on Google
John BaylyApril 2024
The Purevolt team is a credit to the industryThe Purevolt team are a credit to an industry that is getting some bad rep. The initial enquiry was competently returned in an extremely professional and structured format with all equipment details. The visit by Ian was to the agreed minute and all required details taken onboard. The order information submitted by Kelly was very simply followed and all small queries answered very promptly and eloquently. The installation date was the installation date with details given of what turned out to be an exceptionally courteous, engaged and competent installation team who genuinely have pride and enthusiasm for what they do. They also have "dustpans ". I can't recommend the team at purevolt highly enough and am and will further recommend them to my friends and family and colleagues which is the ultimate recommendation I can give anyone. I hope the efforts of the team are appreciated by all levels at PureVolt solar. .
Reviewed on Google
Phil MooreApril 2024
Very professional and promptPureVolt were very professional and prompt throughout the entire process of getting my solar panels installed. Highly recommend.
Reviewed on Google
Helen DayFebruary 2024
Everything ran smoothlyFrom the start, Purevolt were very professional and explained everything to us and kept us updated. From the panels being fitted right through to the turning on of the connection everything ran smoothly. What I liked about Purevolt was, when they said they would be here, they were here, no waiting around for them. Also, they were very competitive with their pricing and they didn't try to sell extras that we didn't need. We would have absolutely no problem recommending this company.
Reviewed on Google
Andrew KellyFebruary 2024
Efficient and communicative - would certainly recommend.
Reviewed on Google
K O'DDecember 2023
We couldn't be happier with the service and system itselfFrom the initial site inspection with Dan and the emails back and forth with Kelly we couldn't be happier with the service and the system itself. Everything was communicated clearly and all completed in the timeframe given. The work was very neat and done well. I would be happy to recommend PureVolt Solar to anyone.
Reviewed on Google
Gordon Hamilton-JonesDecember 2023
The time and effort put in was fantasticI would like to give a big thank you to all of the team at PureVolt who were involved in the design and installation of my recently installed solar panel system. The time and effort put in to what was a complicated design, due to my roof layout, was fantastic (Big thanks to Dan). The two installation teams, the panel fitters on the roof, and the electricians who connected in the Inverter, battery and eddi, were also fantastic. On the back end of this, back in their office controlling all the scheduling and admin etc., answering my many questions about many things but specifically the Grants, Kelly was a star. If you are considering a Solar Panel installation, PureVolt are the company you should go to.
Reviewed on Google
James CurranDecember 2023
Reviewed on Google
GearoidDecember 2023
Very neat, very well explained, super service.I had a great experience with John & Kelly on the initial quote and planning of the installation. The installation was done over 2 days and was perfect. Very neat, very well explained, super service. I had an issue with my hot water cylinder constantly heating when there was enough power but that was sorted very quickly. I would highly recommend the PureVolt team.
Reviewed on Google
Brian GDecember 2023
All very seamless. System is working great.I got three quotes for a Solar PV system and decided to go with PureVolt. The quote was in line with the others and they managed to get more KW out of the space available. We got a 4.5kw system in the end. Communication all along was excellent. The system was installed about 5 weeks after we ordered it, and we received our SEAI grant 3 weeks after the BER assessment - all very seamless. System is working great.
Reviewed on Google
Terry StoreyNovember 2023
Professional, friendly, organised and very tidyThe PureVolt team have been a pleasure to deal with from start to finish. They were professional, friendly, organised and very tidy. We have no hesitation in recommending this company to anyone.
Reviewed on Google
Paul DoyleNovember 2023
Each member of staff I dealt was fantasticI did a lot of research and spoke to many Solar installers before settling on Purevolt. I found them not only knowledgeable but willing to discuss any concerns and ideas that I had. At no point did I find them trying to oversell what I didn't need. Their prices are very competitive and they show clear indicative examples on their site, which I think is very open. You have a fair idea of what you are getting into with them before even making contact. From the outset, each member of staff I dealt was fantastic. Their site visit was the most thorough of them all. Checking the roof, the attic where I was siting the equipment, the main fuse board and even where the earth was situated in the hotpress. This resulted in no surprises at installation. After sales service has been excellent, including a follow up visit from a technician to go through any queries I had and to verify all had been done correctly. Based on my experience there is nothing I could find fault with the company and I plan to recommend them highly if anyone asks (my first is already talking to them). As to the actual result from the installation, very pleased with the outcome so far. Even at this time of year my bills have been halved and will only improve as I get the system setup to my liking. As a user I get access and control over the system, enabling me to tweak and adjust as I need. You don't have to do this, I just like to :)
Reviewed on Google
sean meagherNovember 2023
The quality of the install was perfectI would highly recommend the Pure Volt team. Great customer service, very knowledgeable and helpful. The communications from the roofers and electricians during the install were excellent and the installation as a whole was completed on time and the quality of the install was perfect, very neat and tidy. The panels are in 4 months now and are performing even better than expected.
Reviewed on Google
Barak PearlmutterNovember 2023
10/10, would recommendWe got bids from a bunch of installers, PureVolt was best on all dimensions including price. The install was seamless. 10/10, would recommend.
Reviewed on Google
Philip LeeOctober 2023
Great workmanship, neat, quick and professional.Great workmanship, neat, quick and professional. 4Kw system is working perfectly and has made 3Kw since March 2023 installation.
Reviewed on Google
Iska EuropeOctober 2023
Excellent company to deal with from start to finishPureVolt Solar is an excellent company to deal with from start to finish. Following comprehensive discussion, the installation is professional and with minimal disruption. They also see to relevant paperwork, including SEAI grants. Also, our installation was subject to a random check by SEAI, who found every aspect was excellent. John, Westmeath.
Reviewed on Google
Anthony CondonOctober 2023
Very Good ServiceVery Good Service
Reviewed on Google
M HSeptember 2023
I was left with a professional and tidy installation.I started making enquiries to Solar installation companies in the autum of 2022. Most companies didnt bother to respond, some did but soon lost interest when they realised I had done my research and didnt want to just go with "what everyone else does" (whatever that means). PureVolt were the ONLY company that bothered to do a site visit and discuss what my requirements were and if they were feasable. Anything that was not possible was worked around with suggestions that were explained to me with no sales pressure to "Sign today for a special discount". As it turned out, they were wone of the more better priced quotes unlike some of the gougers out there. My install date had to be pushed back a few times due to supply issues (everyone wanted solar in Autum 2022), but i was kept well informed by John each time. Not once did i have to chase for an update. The guys who came to do the installation were complete proffesionals! They discussed everything with be before they started. I wanted cables routing in a certan way to a specific place and Ian the electrician explained where he could and could not do what i was asking and provided reasons why. The placement of panels on the roof was a tricky one (which is why many companies went silent upon seeing a photo of the house) but the lads stuck at it and I was left with a professional and tidy installation. (I think i called Ian the electrician "an artist"). After a month or so, I started getting error messages on the inverter. I contacted PureVolt and they raised a ticket with the support team for the inverter. After the support team checking the inverter remotely a few times, PureVolt organised a replacement inverter and came to fit it. I think after sales support is sometimes overlooked by people comparing prices only. Many companies install, take your money and you never hear from them again when there is a problem. I am confident that 9 months on, I could contact PureVolt and receive support. Highly recommended!
Reviewed on Google
kevin donovanSeptember 2023
I have highly recommend PureVolt to anyoneVery happy. I have highly recommend PureVolt to anyone that enquired about our Solar system.
Reviewed on Google
Dan CatanaseSeptember 2023
I would choose them again.My system was installed approximately one year ago. My overall experience with PureVolt Solar has been extremely positive. From the initial contact, site survey to customising the technical solution to suit my particular case and needs, I must say they were very responsive to all my questions, prompt in addressing any concerns, quick and tidy installation and great after sales customer experience. If I were to install another system I would choose them again.
Reviewed on Google
Charles McCarthySeptember 2023
Very neat workVery pleased no messing very neat work no cleaning up afterwards
Reviewed on Google
Catalin CucuSeptember 2023
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Eamonn EverardSeptember 2023
Good efficient serviceGood efficient service
Reviewed on Google
Paweł PomianekSeptember 2023
All goodAll good
Reviewed on Google
Michael FarragherAugust 2023
A pleasure to deal withInstalled 21 panels in Feb 2023 which have operated successfully todate. Their responsiveness and knowledge when compiling the quote to proccessing the paperwork required resulting in a efficient install in 2 days, has resulted in PureVolt Ltd being a pleasure to deal with and who l would return to again.
Reviewed on Google
Enda DonnellanAugust 2023
Top company.Top company..Any issues are always solved
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Martin TreacyAugust 2023
I can see results alreadyI found pure volt solar to be very professional and great to deal with. I can see results already, very pleased so far.
Reviewed on Google
Enda and Helene DooleyJuly 2023
...superior to competitors.From the outset our experience with PureVolt has been positive. We had a rapid response to our initial enquiry and the specification and costing was superior to competitors. The estimated time to complete the project was accurate. At all times our queries were answered rapidly. The on-site work was completed within two days and the team left the site tidier than before arrival (not everyone will hoover a tarmacadam drive!). Early days yet but the system is operating to our satisfaction. We would be very happy to work with PureVolt again.
Reviewed on Google
Seamus MorrisseyJune 2023
Easy to deal with and had great advice, no hard sellTop class from beginning to end, John was easy to deal with and had great advice, no hard sell, roofers and electricians top class and Kelly sorted out the paperwork with great effeciency, highly recommend Purevolt.
Reviewed on Google
adrian barryJune 2023
PureVolt going the extra mile for my tricky roof!I had a complicated setup and the very quickly found me a good solution and made sure it was at the most competitive price it could be. The installation was done very well, neatly and with PureVolt going the extra mile for my tricky roof!! We've been producing 65% of our electricity from the roof since they installed it and are on track to exceed our savings. I highly recommend them.
Reviewed on Google
Raymond CarrickJune 2023
PUREVOLT is a great company to work with...PUREVOLT is a great company to work with from first contacting them. I found their website has great information and worth going through before you decide what system you want. Very happy with the price. They did everything, except I needed to set up information for SEAI about the grant which the customer must do themselves. Had panels installed less than 2 months after first contacting them and everything was installed in one day.
Reviewed on Google
Darren McJune 2023
...can't compliment them enoughEverything went perfect from the work that was done on roof so tidy and neat can’t see cable all secured perfectly, to the electricians Tadhg and Jessica I can’t compliment them enough there work is first class nice neat, on wall ran cable down along the stud work cleaned up after themselves,a world of information went through everything all questions answered great information and told we’re only a phone call away if any problems, and kelly with all information and forms filled ahead of time Esb forms sent in ,ran very smoothly cant praise the lads enough thanks Purvolt
Reviewed on Google
Daniel FitzgeraldJune 2023
Highly Recommend.Excellent service and personnel from start to finish. Highly recommend.
Reviewed on Google
Rob ByrneJune 2023
Great service... and total professionals!Can’t recommend PureVolt highly enough. Great service from start to finish and total professionals! Delighted with my new Solar install.
Reviewed on Google
Michael JamisonJune 2023
Would highly recommend them.Ian, Kelly and the team in pure volt were excellent from start to finish. Very professional company. Any questions I had they got back to me straight away. The work of installing the solar panel system is neat and tidy. would highly recommend them. I will definitely be back to them if I need to add anything else to the system.
Reviewed on Google
Karen HammondApril 2023
Excellent workmanship and neat installationPurevolt were excellent to deal with from the quote all the way through to the installation. Extremely professional, excellent workmanship and neat installation. Purevolt completed all the paperwork for grants as soon as the installation was complete. Highly recommend them!
Reviewed on Google
Manish KheterpalApril 2023
Professional from start to finishGood planning and professional from start to finish.
Reviewed on Google
Ken CooganApril 2023
Professional InstallPleasure to deal with and professional install.
Reviewed on Google
Mathies Eduard RasmussenApril 2023
...installed just the way we wanted itWe had our solar & battery system installed by PureVolt in April 2023. Very short lead in time of just 13 days from booking to install for us. They were able to accomodate all of our requests, and everything was installed just the way we wanted it.
Reviewed on Google
Bryan ScullyApril 2023
We are delighted we proceeded with PureVoltCould not speak more highly for PureVolt . From start to finish, it was excellent and stress free. Very competitively priced and provided good, honest advice without trying to sell anything which wasn't needed. The PV system was installed on time and tidy by a very professional team to which they answered any queries we had regarding the installation. The PV panels themselves are performing brilliantly so far. We are delighted we proceeded with PureVolt and would highly recommend them.
Reviewed on Google
John KilroyApril 2023
...delighted with the resultsDelighted with service from beginning to end in dealing with Purevolt solar. They were very competitively priced, had an incredibly fast turnaround time and fitted top quality equipment. I found John very straight talking and honest in his appraisal of the systems and options available - he is an electrician by trade and has worked in solar for years - he is not a salesman just interested in maximising sales and felt he was genuinely interested in providing the best system to suit our needs. The standard of work carried out by the installers was excellent and the electrician Daniel has a real pride in his work and helped me understand the system and the apps to monitor/ control. We now have solar panels installed and are delighted with the results whereby we can monitor our live solar generation and adjust our usage accordingly and heat our water (using my eddi) and sell the excess electricity back to the grid. As well as going green we are seeing a significant drop in our electricity bills so its a Win Win!
Reviewed on Google
Adrian InsleyMarch 2023
Great serviceGreat service. Great support from all PureVolt staff. Would highly recommended this company.
Reviewed on Google
Stefan BinkFebruary 2023
A pleasure to deal withOnce I decided to go with solar panels- the competence, professionalism and delivery of project was top class. The technician that put panels on roof, and the electrical technician that put in the battery and electric press and connected all to house fuse box, were very knowledgeable, experienced and a pleasure to deal with. From the initial contact with the Project Manager to the final installation- the full journey was well explained and I was confident and assured that the installation was delivered to the highest standard.
Reviewed on Google
Martha SFebruary 2023
...so grateful to have found PurevoltMy husband and I can't provide enough superlative praise to John and his team. We had a system of ten photovoltaic panels installed on our roof this past autumn and found the entire experience a very positive one, from Kelly overseeing logistics from the office to our installation team, who didn't leave until they were certain that all of our questions had been answered. We thought long and hard about the initial expense of installing such a system, but we have absolutely no regrets and have found the panels to be producing at a level in excess of our expectations. To do something good for the environment and our grandchildren, as well as something that has already begun to reap financial benefits is a win win. We are so grateful to have found Purevolt.
Reviewed on Google
John HudsonJanuary 2023
I'm delighted with PureVoltOnce you have managed to make contact and get a quote (which, as with other solar installers, can take some time) the installation and service from PureVolt was excellent. Very competitively priced and gave good, honest advice without trying to sell anything which I didn't need. The solar panels were installed on time by very professional and friendly roofers and electrician who answered any questions regarding the installation. Following the installation SEAI inspected the works and found nothing to be concerned about. PureVolt's John Egan attended the inspection to in order that he could rectify any problems should they arise. For the first couple of days after the installation I had some minor issues with the inverter app which PureVolt resolved by liaising with the inverter manufacturer. I'm delighted with PureVolt and I highly recommend them.
Reviewed on Google
Tim HynesNovember 2022
Highly recommendOnce I decided to go with solar panels- the competence, professionalism and delivery of project was top class. The technician that put panels on roof, and the electrical technician that put in the battery and electric press and connected all to house fuse box, were very knowledgeable, experienced and a pleasure to deal with. From the initial contact with the Project Manager to the final installation- the full journey was well explained and I was confident and assured that the installation was delivered to the highest standard.
Reviewed on Google
Alan DeacyNovember 2022
Extremely happy with the serviceEnquired about a new PV system. John phoned me back shortly after my enquiry and went into great detail about the different systems and tailored one that would suit my needs. I received a very competitive price. Extremely happy with the service this company provided. Very professional and knowledgeable in the solar industry.
Reviewed on Google
Aidan BerginNovember 2022
Would highly recommend this companyWould highly recommend this company for your solar installation, efficient, tidy and the lads keep you well informed as the installation proceeds.
Reviewed on Google

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