Glint and Glare Assessment Ireland
Glint and Glare Assessments for Solar PV Projects in Ireland
We carry out ForgeSolar-based glint and glare assessments for solar PV planning applications across Ireland, covering roads, residential receptors, aviation, rail corridors and other sensitive viewpoints.
What Is a Glint and Glare Assessment?
A glint and glare assessment is a reflected sunlight impact assessment that identifies whether solar panels will cause problematic reflections affecting nearby receptors. It is produced using ForgeSolar modelling software, which analyses panel geometry, tilt, orientation and the location of surrounding receptors to predict glare occurrence under worst-case clear-sky conditions.
Receptors We Assess
- ✓Public roads and transport routes
- ✓Residential receptors
- ✓Rail receptors
- ✓Aviation flight paths
- ✓Air traffic control tower receptors
- ✓Commercial and sensitive receptors
- ✓Public viewpoints where relevant
Our Methodology
We use ForgeSolar modelling with site-specific inputs including PV array geometry, tilt angle, azimuth orientation, panel height and receptor identification. Results are presented as green and yellow glare classifications under worst-case clear-sky conditions. Where glare risk is identified, we include mitigation recommendations in the assessment report.
What’s Included in the Report
- ✓Receptor map of dwellings, roads, rail and aviation points
- ✓ForgeSolar modelling results for every receptor
- ✓Green and yellow glare classifications
- ✓Glare occurrence charts by time of day and year
- ✓Mitigation recommendations where glare is identified
- ✓Planning-ready PDF with methodology and conclusions
You can view an example of the format in our sample glint and glare report. For the methodology behind the assessment, read our free glint and glare guidance for Irish planning applications.
When Is an Assessment Required?
- ✓Ground-mounted solar farms near roads, dwellings or railways
- ✓Commercial rooftop PV near roads or airports
- ✓Sites near aviation-sensitive areas
- ✓Sites where the planning authority has requested an assessment
- ✓Projects near rail or transport corridors
Need Solar PV Planning Drawings or a Glint and Glare Report?
Send us your site layout, panel details, planning comments or project brief. We can review the requirements and provide a fixed quotation.
Frequently Asked Questions
When is a glint and glare assessment required in Ireland?
A glint and glare assessment is typically required for ground-mounted solar farms, commercial rooftop PV near roads or airports, sites near dwellings, sites near rail or transport corridors, and whenever a planning authority requests one. Requirements vary by local authority and site context.
What are the Solar Safeguarding Zones and do they apply to my site?
The Planning and Development (Solar Safeguarding Zone) Regulations 2022 (S.I. No. 492 of 2022) define 43 zones around airports, aerodromes, military barracks and hospital helipads where solar reflections could affect aviation safety. They took effect on 5 October 2022. Inside a zone, rooftop solar on buildings other than houses is limited to 300 square metres per rooftop to remain exempted development — above that a planning application is required, and the aviation reflection question will need answering. Houses are not subject to the area cap. Send us your site location and we will confirm whether it falls inside a zone.
How much does a glint and glare assessment cost in Ireland?
The fee depends on the scale of the array and the number of receptors that need to be modelled — a domestic rooftop near a road is a much smaller study than a multi-field solar farm near an airport. We quote a fixed fee for every project before any work begins, usually within one business day of receiving your site layout, so there are no surprise costs.
How long does a glint and glare assessment take?
Once we have the site layout, panel specifications and permission to proceed, most standard assessments are completed within a few working days. Larger solar farms with many receptors or aviation modelling can take longer — we confirm the delivery date alongside the fixed-fee quotation.
What is included in the assessment report?
The report includes a description of the methodology, a receptor map identifying dwellings, roads, rail and aviation receptors around the site, ForgeSolar modelling results for each receptor with green and yellow glare classifications, glare occurrence charts showing when in the year and day any glare occurs, mitigation recommendations where needed, and a conclusion written for planning officers. It is delivered as a PDF ready to submit with your planning application.
Will Irish planning authorities accept the assessment?
Our assessments are prepared specifically for Irish planning applications and follow the ForgeSolar methodology, which is based on the internationally recognised FAA Solar Glare Hazard Analysis Tool approach. The reports are structured to address the questions local authority planners and An Bord Pleanála inspectors raise about reflected sunlight impacts.
What is ForgeSolar?
ForgeSolar is specialist software used to model potential glint and glare impacts from solar PV arrays. It analyses panel tilt, azimuth, array geometry and receptor locations to predict when and where glare may occur, outputting green and yellow glare results under worst-case clear-sky conditions.
What is green glare?
Green glare is a temporary, low-impact solar reflection that does not cause significant discomfort. ForgeSolar categorises glare results, and green glare is generally acceptable to Irish planning authorities.
What is yellow glare?
Yellow glare indicates a higher intensity reflection that may require assessment and potentially mitigation. Where yellow glare is identified at sensitive receptors, we provide mitigation recommendations in our report.
Can panel tilt and orientation reduce glare?
Yes. Panel tilt angle and azimuth (orientation) directly affect glare risk. Our glare pre-simulation service allows early-stage testing of different configurations to minimise glare before finalising your planning layout.
Do you provide mitigation recommendations?
Yes. Where our assessment identifies glare risk at sensitive receptors, we include practical mitigation recommendations such as adjusted panel angles, anti-reflective coatings or screening measures.