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.
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.
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.
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).
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.
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.
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.
PureVolt Solar Reviews
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.
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 :)
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.
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.
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!
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.
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.
...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.
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.
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.
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.
...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
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.
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!
...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.
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.
...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!
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.
...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.
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.
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.
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.
We're an independent Irish solar panel installation company with bases in Galway and Dublin. We are a solar PV installer across Ireland . Solar is in our DNA, and we're on a mission to see solar panels installed on every roof in Ireland. That way, we can all save money and look after this little planet we all call home. If you have any questions about going solar, please just get in touch – we love to talk!