Solar panel installation process explained in Ireland (2026), including survey steps, installation timeline and commissioning requirements.
1. Overview
Domestic solar panel installation in Ireland typically follows a structured sequence of:
Site assessment
System design
Grant application (if applicable)
Installation
Commissioning and certification
The on-site installation process is usually completed within:
1 – 2 days for most domestic systems.
However, the full project timeline from initial survey to system activation may take several weeks depending on installer scheduling and grant approval timelines.
2. Initial Property Assessment
Before installation, the installer conducts a site survey.
This typically evaluates:
Roof orientation and pitch
Available roof area
Shading from nearby structures or trees
Electrical board capacity
Cable routing pathways
Roof structural condition
Survey results determine:
Maximum system size
Panel layout
Inverter specification
Most surveys take between:
30 minutes – 1 hour.
3. System Design and Proposal
Following the survey, the installer prepares a system proposal including:
Panel quantity and layout
Estimated annual generation
Inverter specification
Total installation cost
Grant eligibility
Example system design:
| System Size | Panels | Estimated Output |
|---|---|---|
| 3.8 kWp | 10 panels | ~3,800 kWh/year |
| 5.2 kWp | 14 panels | ~5,000 kWh/year |
| 6.5 kWp | 18 panels | ~6,200 kWh/year |
Panel layout may be adjusted to maximise roof space and reduce shading losses.
4. SEAI Grant Application
If using the SEAI solar grant, the application must be submitted before installation begins.
Application process typically involves:
Homeowner application submission
Installer details confirmation
Grant approval issued
Approval timelines vary depending on application volume.
Installation should not proceed until grant approval is confirmed.
5. Roof Mounting Installation
Installation begins with the mounting system.
Steps include:
Roof tile removal (where necessary)
Installation of roof hooks or brackets
Aluminium rail mounting
Reinstallation of roof tiles around brackets
Mounting hardware secures the solar panels to the roof structure.
Typical mounting installation time:
2 – 4 hours.
6. Panel Installation
Once mounting rails are installed, solar panels are secured to the rails.
This stage includes:
Panel placement and alignment
Panel electrical connections (DC cabling)
Cable routing toward inverter location
Typical installation time for panels:
2 – 3 hours depending on system size.
7. Inverter Installation
The inverter converts DC electricity produced by panels into usable AC electricity.
It is typically installed:
In attic spaces
Utility rooms
Garages
Installation includes:
Inverter mounting
DC cable connection from panels
AC connection to consumer unit
Safety isolators installation
Inverter installation typically takes:
2 – 3 hours.
8. Electrical Integration
The system is connected to the home’s electrical system.
Electrical work includes:
Connection to distribution board
Installation of generation meter (if required)
Installation of isolators and protection devices
Electrical integration usually takes:
1 – 2 hours.
Electrical board upgrades may be required in some homes.
9. System Commissioning
After installation, the system is commissioned.
This process includes:
Electrical testing
System performance checks
Monitoring setup
Verification of safety components
Commissioning ensures the system is operating correctly and safely.
10. Documentation and Certification
Following installation, documentation is provided.
Typical documentation includes:
Electrical completion certification
System commissioning report
Panel and inverter warranty documentation
Grant documentation (if applicable)
This documentation is required for SEAI grant claims.
11. Installation Timeline Example
| Stage | Typical Duration |
|---|---|
| Survey and design | 1 – 2 weeks |
| Grant approval (if applicable) | Variable |
| Installation day | 1 day |
| Commissioning and setup | Same day |
| Grant payment processing | 4 – 8 weeks |
Most domestic systems are operational immediately after installation.
12. Typical Installation Summary
Solar panel installations typically require:
1 day on-site installation
10 – 20 panels depending on system size
1 inverter installation
The full project timeline from survey to completion generally ranges:
2 – 6 weeks depending on installer scheduling and grant processing.
13. Other Resources
Solar Panel Battery Add-On Cost