Solar Water Heating Grant Ireland — €1,200 from SEAI
SEAI offers a flat-rate €1,200 grant toward a solar thermal (solar water heating) system — roof-mounted collectors that can provide 50–60% of your annual hot water needs. This guide covers eligibility, post-works requirements, planning considerations, and how this differs from the Solar PV grant.
Check If My Home QualifiesWhat This Grant Is
The Solar Water Heating Grant (also called the solar thermal grant) is a SEAI grant of €1,200, available as a flat rate regardless of property type or system size. It covers the installation of solar thermal collectors — roof-mounted panels that absorb heat from sunlight to warm your domestic hot water.
Solar Thermal vs Solar PV — Key Difference
Solar Water Heating (Thermal)
- • Heats domestic hot water using sunlight
- • Roof-mounted collectors with a water circuit
- • Typically covers 50–60% of annual hot water needs
- • SEAI grant: €1,200 flat rate
- • Post-works BER required before payment
Solar PV (Electricity)
- • Generates electricity from sunlight
- • Photovoltaic panels with inverter
- • Excess electricity can be exported to grid
- • SEAI grant: up to €1,800 (€900/kWp)
- • No post-works BER requirement
Both grants can be claimed at the same time if both systems are being installed. See the Solar PV guide →
Current Support Amount
€1,200
flat rate grant
regardless of property type
• Flat rate — same for detached, semi, terraced, and apartments
• Applied after works are completed and post-works BER is confirmed
• Verified against SEAI published rates (March 2026)
Always verify the current rate at seai.ie before applying — rates may change.
Who It Usually Suits
Homes with high hot water use
Families or households with high domestic hot water demand see the best return from solar thermal — the savings are proportional to how much hot water you use.
Homes with suitable south-facing roof space
Solar thermal collectors work best on south-facing roofs with minimal shading. A south-east or south-west aspect is also acceptable. A qualified installer can assess your roof.
Homes not planning a heat pump
Heat pumps can serve domestic hot water efficiently, so if a heat pump is planned, it may reduce the case for solar thermal. Discuss with your contractor.
Homes with existing cylinder storage
Solar thermal systems require a compatible hot water cylinder. Most installers will assess this as part of the survey. Upgrading the cylinder may add to costs.
Main Eligibility Points
Home built and occupied before 2021
Homes built or first occupied in 2021 or later are not eligible for the solar water heating grant.
No previous solar water heating grant at this property
If this grant has already been claimed at the property (by you or a previous owner), you cannot claim again.
SEAI-registered installer
The system must be installed by a contractor registered with SEAI for solar water heating. Verify registration before agreeing to work.
Apply and receive approval before installation begins
Grant approval must be received in writing from SEAI before any installation work starts — including site surveys that form part of the works.
Post-works BER required
A post-installation BER assessment must be completed by a registered BER assessor before SEAI will release grant payment. The SEAI €50 BER contribution may apply.
Eight months to drawdown
Once SEAI issues a grant offer, you have 8 months to complete installation and claim the grant. If you miss this window, you must reapply.
Do not start installation before receiving written SEAI approval.
What Commonly Blocks or Complicates It
Post-works BER is often overlooked
The post-works BER requirement is easy to miss. It must be completed before SEAI pays the grant. Budget for this (typically €150–€350; SEAI €50 contribution may apply) and arrange it promptly after installation.
Planning limits on installation size
The exemption from planning permission only applies to installations not exceeding 12m² or 50% of total roof space. Larger systems require planning permission before works begin. Confirm with your installer and local authority if in doubt.
Roof orientation and shading
South-facing roofs with no shading perform best. North-facing or heavily shaded roofs may not generate enough return to justify the investment. Have this assessed before applying.
Cylinder compatibility
An existing hot water cylinder may need to be upgraded or replaced to be compatible with the solar thermal system. This adds to costs and should be factored into your budget.
Apartments — OMC approval likely needed
Apartment installations typically require approval from the owner management company (OMC) before works can begin.
Typical Cost vs Support
| Item | Typical range |
|---|---|
| Solar water heating system installation | €2,500–€6,000 |
| SEAI solar water heating grant | −€1,200 |
| Post-works BER assessment | ~€150–€350 (SEAI €50 contribution may apply) |
| Your indicative net cost | ~€1,150–€4,650 |
Costs vary significantly by system, roof type, cylinder compatibility, and contractor. Always get at least 3 quotes from SEAI-registered installers.
Correct Application Process
Apply to SEAI before any work starts
Submit your grant application at hes.seai.ie. You will need your MPRN (from your electricity bill) and property details. Do not start any works until written approval is received.
Receive written approval
SEAI reviews your application and issues written grant approval. Only once this is received can you proceed to installation.
Get quotes from SEAI-registered installers
Find installers registered with SEAI for solar water heating. Get at least 2–3 written quotes before selecting a contractor.
Installation carried out
Your chosen SEAI-registered installer carries out the work. Confirm the installation is within planning exemption limits or that planning permission has been obtained.
Post-works BER assessment
Arrange a post-works BER assessment with a registered BER assessor. This is required before SEAI releases payment. Do not delay this step.
Submit completion documentation
Your installer submits a completion report to SEAI. Submit the post-works BER certificate. SEAI processes the grant payment.
Do not start installation before written SEAI approval. This disqualifies your grant with no appeal process.
Common Mistakes
Starting installation before receiving written SEAI approval
Forgetting to arrange the post-works BER before claiming the grant
Missing the 8-month drawdown deadline
Installing a system larger than 12m² without planning permission
Using an unregistered installer — this disqualifies the grant entirely
Related Grants and Routes
Solar PV Grant (up to €1,800)
Separate grant for solar electricity panels — can be claimed alongside solar thermal. Clean Export Guarantee income also available.
Read the Solar PV guide →
Heat Pump Grant (up to €12,500)
If planning a heat pump, discuss with your contractor whether solar thermal remains the best hot water solution alongside it.
Read the Heat Pump guide →
Apply at SEAI.ie
All applications through the official SEAI portal.
Check All Support Options for Your Home
Start Grant NavigatorFree · No sign-up · Indicative results in minutes