Solar Roof Checker
Enter your Eircode to see your roof from above with solar panels on it, what they'd generate, and what you could save.
Free — works for most Irish addresses. No signup required.
How the Roof Checker Works
We find the roof and do the measuring: your building's outline comes from Tailte Éireann's building map, panels are fitted at true scale on satellite imagery, and output is estimated from PVGIS solar data for your county, Irish electricity prices and SEAI grant rates.
1. Find your roof
Your Eircode or address brings up a satellite shot of your roof at about 5cm per pixel.
2. Fit the panels
The building outline is split into roof faces along the ridge and 440 W panels are fitted with a realistic edge margin on the side worth using. Each side's direction comes from the outline; the pitch is assumed at 30° (5° for flat roofs), not measured. Slide to change how many panels, or switch sides.
3. Estimate your savings
We apply typical Irish electricity rates, the Clean Export Guarantee, and the SEAI solar grant (up to €1,800) to estimate annual savings and payback time.
What the checker can't tell you
This is a first estimate, not a survey. The checker doesn't know your actual electricity usage, your roof's structural condition, the state of your fuse board, or whether velux windows and chimneys will constrain the layout. Your roof's pitch is assumed, not measured, and output uses your county's PVGIS average rather than a shading model of your specific roof. If your building isn't on Tailte Éireann's map yet, the checker can't fit panels to your roof and prices a typical system for the facing you pick instead.
That's why the next step is getting 2-3 quotes from SEAI-registered installers — they confirm the layout on site and price the actual system. See our guides on solar panel costs, SEAI grants, and payback periods to sense-check any quote you receive.
Frequently Asked Questions
How does the solar roof checker work?
Enter your Eircode or address and we show a satellite shot of your roof with a panel array laid on it. The roof outline comes from Tailte Éireann's national map of buildings. We split it into faces along the ridge, take each face's direction from the outline, assume a pitch of 30° (5° for flat roofs), and fit standard 440 W panels on the side worth using. You choose how many panels and which side of the roof. Output is estimated from PVGIS solar data for your county, adjusted for that facing and the assumed pitch.
How accurate is the roof analysis?
It's a first estimate. The panel layout depends on how accurately your building is traced on Tailte Éireann's building map, and the pitch is assumed (30°), not measured, so steeper or shallower roofs will differ. Output uses your county's PVGIS average and does not model shading from trees, chimneys or nearby buildings. If your building isn't on that map yet, the checker can't fit panels to your roof and shows a typical system for the facing you choose instead. An installer visit is still needed to confirm panel layout, structural condition and electrical work before a final quote.
How many solar panels does a typical Irish home need?
Most Irish homes install between 10 and 14 panels (around 4-6 kWp). A 4 kWp system generates roughly 3,400-3,800 kWh per year in Ireland, which covers a large share of average household usage of around 4,200 kWh.
What if my roof faces north or east-west?
South-facing roofs generate the most, but east-west roofs still produce around 80-85% as much and spread generation across morning and evening when you actually use electricity. Even north-facing roofs can be viable in some cases. The checker works out which way each side of the roof slopes, puts panels on the best side first, and lets you switch sides or use both.
Is my address stored when I use the checker?
No. Your address is used only to look up your roof and is not saved. If you choose to request quotes afterwards, only the details you submit in the quote form are shared.