Frequently Asked Questions
Everything you need to know about solar, grants, and our platform
Solar Panels
How much does a solar panel system cost in Ireland?
After the €1,800 SEAI Solar PV grant, a typical 4kW system costs roughly €5,400–6,800 net. Without a battery, most homes see payback in about 6–10 years, depending on how much of the power they use during the day and their export rate.
How much electricity will solar panels generate?
A 4kW system generates approximately 3,700 kWh per year in Ireland, enough to cover 60-80% of average household usage.
Do solar panels work in Irish weather?
Yes! Solar panels work with daylight, not direct sunlight. Ireland gets sufficient daylight year-round for viable solar generation.
What size system do I need?
Most Irish homes need 3-6kW. Check your annual electricity usage (kWh) on your bill and use our calculator for a personalized recommendation.
SEAI Grants
What SEAI grants are available?
Solar PV: up to €1,800 • Battery Storage: no SEAI grant currently available (removed Jan 2024) • Heat Pump: up to €12,500. You can claim multiple grants for different upgrades.
Who is eligible for SEAI grants?
Homeowners of properties built and occupied before 2021, with a valid BER certificate, using SEAI-registered installers.
How long does the grant application take?
Applications are typically processed within 8-14 weeks after submitting all required documentation.
Do I apply before or after installation?
After. Complete the work, pay in full, then apply within 6 months with proof of payment and installer declaration.
Can landlords claim SEAI grants?
Yes, landlords can claim grants for rental properties that meet the eligibility criteria.
Battery Storage
Do I need a battery with solar panels?
No, but batteries maximize savings by storing excess solar energy for use at night when electricity rates are higher.
What size battery do I need?
Most Irish homes benefit from 5-10kWh. Use our Battery Optimizer to calculate optimal size based on your usage patterns.
Can I add a battery later?
Yes, batteries can be added to existing solar systems. There is no SEAI grant for a battery on its own. If the battery is installed with new panels, the solar PV grant (up to €1,800) applies to the panels only.
What is night rate arbitrage?
Charging your battery during cheap night rates (€0.22/kWh) and using stored energy during expensive day rates (€0.41/kWh) to save money.
Heat Pumps
What BER rating do I need for a heat pump?
Minimum C3 rating required. Heat pumps work best in well-insulated homes (B3 or better recommended).
Will a heat pump work in my old house?
Possibly, but you may need insulation upgrades first. Use our Heat Pump Checker to assess suitability.
Air source vs ground source - which is better?
Air source is cheaper (€14k vs €20k) and easier to install. Ground source is more efficient but requires more land/works.
What are the running costs?
Typical running cost is €800-1,200/year, saving €1,200-1,500 compared to oil heating.
Finding Installers
How do I find a good installer?
Get at least three quotes, check each installer on SEAI’s published register before you sign, ask who submits the grant application, and get the warranty terms in writing. Our quote form sends one request to installers on our network covering your county.
Why must I use an SEAI-registered installer?
SEAI grants require registered installers. They have training, insurance, and follow quality standards.
How many quotes should I get?
At least three. Our quote form passes your request to installers on our network covering your county; the network is still growing, so it is worth getting quotes elsewhere too.
What should I ask installers?
Ask about: warranty terms, installation timeline, system monitoring, maintenance requirements, and grant application support.
Platform & Premium
Is SolarGreen.ie free to use?
Yes! All calculators, grant guides, and the installer directory are 100% free. The Premium plan (€4.99/month), which unlocks the month-by-month generation breakdown, is optional.
What do I get with Premium?
A month-by-month generation breakdown for the system you are looking at. That is all it adds today — everything else on the site is free.
How do installers join the platform?
Installers can register at /installers-portal. It is free for founding installers while the network is built.
Do you sell or install solar panels?
No, we're a platform that passes homeowners’ quote requests to installers on our network. We don't sell equipment or install systems.
Still have questions?
Can't find what you're looking for? Our calculators and grant guides have detailed information, or you can contact SEAI-registered installers directly through our platform.