Choosing the right solar installer is one of the most important decisions you will make when going solar. A quality installer ensures your system is designed correctly, installed safely, eligible for SEAI grants, and backed by solid warranties. A poor installer can leave you with underperforming panels, voided warranties, grant application rejections, and costly repairs.
With over 155,000 solar installations completed in Ireland and the market growing rapidly, homeowners have more installer options than ever. But not all solar companies deliver the same quality, service or value.
This guide gives you 10 essential questions to ask every solar installer before signing a contract. Use this checklist to compare quotes, vet companies and choose an installer you can trust for the next 25 years.
Make the smart choice. Choose an installer who answers every question with confidence, backs every promise with warranties, and supports you for the full 25-year lifespan of your solar system.
1. Are You SEAI Registered for Solar PV Installations?
Why this matters:
Only SEAI-registered solar installers can certify that your installation meets the requirements for the €1,800 SEAI solar grant. If your installer is not SEAI-registered, you cannot claim the grant, even if the installation meets all technical standards.
What to ask:
- "Are you registered with SEAI as a Solar PV installer?"
- "Can you provide your SEAI registration number?"
How to verify:
Check the SEAI Find a Registered Professional directory. Search by company name or Eircode to confirm current registration status.
Red flag:
Any installer who says "we can still do the work, you just apply for the grant yourself" is giving you incorrect information. SEAI requires registered installers to certify compliance. Without that certification, your grant application will be rejected.
WattCharger's approach:
WattCharger is SEAI-registered and Safe Electric certified. We handle all SEAI grant paperwork on your behalf, from initial application to final certification, ensuring your €1,800 grant is secured without hassle.
2. What Insurance and Certifications Do You Hold?
Why this matters:
Solar installation involves working at height, electrical systems, and structural modifications to your roof. Proper insurance protects you if something goes wrong during installation or in the years that follow.
What to ask:
- "Do you carry public liability insurance? What is the coverage amount?"
- "Do you have employer's liability insurance for your installation team?"
- "Are you Safe Electric registered?"
- "Do you carry professional indemnity insurance?"
Minimum standards:
- Public liability insurance: €6.5 million minimum (industry standard in Ireland)
- Safe Electric registration: Required for all electrical work in Ireland
- Employer's liability insurance: Protects you if an installer is injured on your property
How to verify:
Ask to see proof of insurance certificates and check the Safe Electric register for current certification.
Red flag:
Any installer who hesitates to provide proof of insurance or says "we are covered through a subcontractor" without documentation. You need direct evidence that you are protected.
3. What Equipment Brands Do You Install and Why?
Why this matters:
Not all solar panels and inverters are created equal. The quality of equipment determines your system's performance, lifespan and warranty coverage for the next 25 to 30 years.
What to ask:
- "What panel brands do you recommend and why?"
- "What tier are these panels?" (Tier 1 is the industry standard for quality and financial stability)
- "What inverter brands do you install?"
- "Can I choose different equipment if I prefer, or are you locked into specific brands?"
What to look for:
- Panel brands: Tier 1 manufacturers like Longi, Jinko, JA Solar, Canadian Solar, Trina Solar, SunPower (established companies with proven track records)
- Inverter brands: SolarEdge, Huawei, GivEnergy, Solis, Growatt, Fronius (reliable brands with good Irish distributor support)
- Flexibility: Quality installers stock multiple brands and can explain the pros and cons of each
Red flag:
Installers who push a single brand without explaining alternatives, or who offer only budget-tier equipment with no Tier 1 options. You want choice and transparency.
WattCharger's approach:
We install Tier 1 panels from reputable manufacturers with proven performance in Irish weather conditions. We explain equipment options clearly and recommend systems tailored to your energy needs, roof orientation and budget.
4. What Warranties Do You Provide?
This is one of the most important questions. Solar systems have three types of warranties, and you need clarity on all three.
Panel Performance Warranty
What to ask:
- "What is the panel performance warranty?" (Typical: 25 years, guaranteeing 80 to 85% output after 25 years)
- "Who honours this warranty, the manufacturer or you?"
Inverter Warranty
What to ask:
- "What is the inverter warranty?" (Typical: 5 to 12 years, with extension options to 20 to 25 years)
- "Can the inverter warranty be extended, and at what cost?"
Installation Workmanship Warranty
What to ask:
- "What workmanship warranty do you provide on the installation itself?" (Minimum: 2 years, better installers offer 5 to 10 years)
- "What does the workmanship warranty cover?" (Roof penetrations, mounting, electrical connections, weatherproofing)
- "Who do I contact if there is a problem, and what is your response time?"
What to look for:
- Panel warranty: 25 years minimum
- Inverter warranty: 10+ years (or 5 years with affordable extension option)
- Workmanship warranty: 5+ years from the installer
Red flag:
Installers who offer only manufacturer warranties with no workmanship guarantee of their own. If the installer goes out of business in year 3, you are left dealing with manufacturers directly, often based overseas.
WattCharger's approach:
We provide comprehensive workmanship warranties on all installations and register all equipment warranties on your behalf. If something goes wrong, you have a single point of contact in Ireland to resolve the issue quickly.
For more on warranties, read our guide: Solar Panel Warranties: What You Need to Know.
5. How Long Will the Installation Take?
Why this matters:
Installation timelines vary based on system size, roof complexity and installer workload. Knowing what to expect helps you plan and identifies whether the installer is overcommitted.
What to ask:
- "How long from contract signing to installation date?"
- "How many days will the installation take?"
- "What happens if there are delays?"
Typical timelines in Ireland (2026):
- Contract to installation: 2 to 8 weeks (depending on installer backlog and equipment availability)
- Installation itself: 1 to 3 days for residential systems (7 kWp typical)
- Grant processing: SEAI processes grants within 12 weeks of installation completion
Red flag:
Installers who promise immediate installation (often a sign of low demand or cutting corners) or who cannot give you any timeline estimate (sign of disorganisation or overcommitment).
6. Do You Handle All SEAI Grant Paperwork?
Why this matters:
The SEAI grant application process involves multiple steps: BER assessment, Declaration of Works, photographic evidence, electrical certification and final submission. Missing a step or submitting incorrect paperwork delays or invalidates your €1,800 grant.
What to ask:
- "Do you handle the full SEAI grant application on my behalf?"
- "Is the grant application service included in your quote, or is it an extra charge?"
- "What documents do I need to provide?"
- "How long does grant approval typically take?"
What full service includes:
- BER (Building Energy Rating) assessment coordination
- Declaration of Works submission
- Installation photographs and documentation
- Safe Electric electrical certification
- Final grant claim submission to SEAI
- Grant payment confirmation to you
Red flag:
Installers who say "you can apply for the grant yourself" or charge extra fees (€200 to €500) for grant application services. Quality installers include this as standard.
WattCharger's approach:
We handle all SEAI grant paperwork as part of our installation service at no extra charge. You simply provide proof of home ownership and occupancy, and we manage the rest from start to grant payment.
For full details on SEAI solar grants, read: Understanding SEAI Grants for Solar in Ireland: 2025 Update.
7. Can You Provide References from Recent Installations?
Why this matters:
Past customer experiences reveal how an installer handles problems, communicates during delays, and supports customers after installation. A company with nothing to hide will happily provide references.
What to ask:
- "Can you provide contact details for 3 to 5 customers who had installations in the past 6 to 12 months?"
- "Can I see examples of similar installations?" (Roof type, system size, similar to your home)
- "Do you have Google reviews, Trustpilot reviews or other independent feedback I can read?"
What to ask those references:
- "Were there any surprises or issues during installation?"
- "How did the company handle problems or delays?"
- "Is the system performing as promised?"
- "Would you use this installer again?"
Where to check reviews:
- Google Business reviews
- Trustpilot
- Facebook community groups (Solar Panels Ireland, Irish Solar Panels Discussion)
- Boards.ie and Reddit threads
Red flag:
Installers who refuse to provide references, have no online reviews, or have reviews concentrated on a single platform only (often fake reviews).
WattCharger's approach:
WattCharger has 5-star ratings on Trustpilot with over 100 verified customer reviews. We are happy to provide references and examples of installations similar to yours.
8. What Post-Installation Support Do You Offer?
Why this matters:
Solar systems run for 25+ years. You need an installer who will still be around to support you in years 5, 10 and 15, not just on installation day.
What to ask:
- "What happens if I have a question or problem after installation?"
- "Do you offer system monitoring and maintenance services?"
- "What is your response time for warranty claims or technical issues?"
- "How do I contact you for support?" (Phone, email, portal, dedicated support team?)
What good support looks like:
- Dedicated customer support phone line or email
- System monitoring portal to track performance
- Response within 24 to 48 hours for technical queries
- Clear warranty claim process
- Optional annual maintenance packages
Red flag:
Installers who say "the system is maintenance-free, you will never need to contact us" or provide only a generic email address with no phone support.
WattCharger's approach:
We provide best-in-class post-installation customer service with dedicated support contacts, system monitoring assistance, and rapid response to any technical issues. Our goal is long-term customer relationships, not one-off installations.
9. What Are Your Payment Terms?
Why this matters:
Payment structure protects both you and the installer. Reputable companies follow industry-standard payment milestones tied to work completed.
What to ask:
- "What is the payment schedule?"
- "Do you require a deposit, and how much?"
- "When is final payment due?"
- "Do you offer financing options?"
Standard payment structure in Ireland:
- Deposit: 10 to 30% on contract signing (secures equipment and installation slot)
- Progress payment: 30 to 50% on installation day or when installation is complete
- Final payment: 20 to 40% after electrical certification, SEAI grant submission and system handover
Red flag:
Installers who demand 100% payment upfront, request cash payments only, or have payment terms heavily weighted to the start of the project (e.g., 70% deposit). This leaves you with no leverage if problems arise.
Financing options:
Some installers partner with finance providers to offer 0% or low-interest payment plans. Ask about financing eligibility, interest rates and total cost.
10. What Happens If Something Goes Wrong?
Why this matters:
This is the ultimate test question. A confident, experienced installer will have clear processes for handling faults, warranty claims and customer complaints.
What to ask:
- "What is your process if a panel or inverter fails under warranty?"
- "Who pays for labour to replace faulty equipment under warranty?"
- "What happens if there is roof damage or a leak related to the installation?"
- "Do you have a formal complaints procedure?"
What good answers sound like:
- "We handle all warranty claims on your behalf and coordinate directly with manufacturers."
- "Our workmanship warranty covers all labour costs for repairs related to our installation."
- "If there is a roof issue, we return immediately to assess and repair at no cost under our workmanship warranty."
- "We have a formal complaints process with escalation to senior management and an ombudsman if needed."
Red flag:
Vague answers like "the manufacturer will sort it out" or "that has never happened to us." Every installer occasionally has issues. You want someone with a plan, not someone who avoids the question.
Bonus Tips for Vetting Solar Installers
Get Multiple Quotes (Minimum 3)
Always compare at least three quotes from different SEAI-registered installers. This gives you:
- A sense of fair market pricing
- Different equipment options and system designs
- Comparison of warranty and support offerings
For guidance on reading quotes, see: How to Read a Solar Panel Quote in Ireland: Red Flags and What to Look For.
Check How Long the Company Has Been Trading
New companies can be excellent, but established installers (3+ years trading) have proven track records, stable supply chains and are more likely to be around for warranty support in 5 to 10 years.
Ask About System Monitoring
Modern solar systems include monitoring apps that show real-time generation, consumption and system health. Ask what monitoring platform the installer provides and whether ongoing monitoring support is included.
Clarify What Is Included in the Quote
Ensure the quote includes:
- Panels, inverter, mounting and all electrical components
- Labour for installation
- Scaffolding (if required)
- SEAI grant application and BER assessment
- Electrical certification and Safe Electric compliance
- Removal of waste and site cleanup
Trust Your Instincts
If an installer makes you uncomfortable, rushes you to sign, or dismisses your questions, walk away. Quality installers are patient, transparent and happy to explain every detail.
Red Flags to Avoid
Watch out for installers who:
- Are not SEAI-registered but claim you can still get the grant
- Cannot provide proof of insurance
- Offer only one equipment brand with no alternatives
- Provide no workmanship warranty of their own
- Refuse to give references or have no online reviews
- Demand full payment upfront
- Pressure you to sign immediately with limited-time offers
- Give vague answers about what happens if something goes wrong
Final Thoughts
Choosing the right solar installer is as important as choosing the right solar panels. A quality installer ensures your system is designed properly, installed safely, eligible for SEAI grants and backed by comprehensive warranties and support.
Use these 10 questions as your vetting checklist. Compare answers across multiple quotes. Check references, insurance and SEAI registration. And trust your instincts. The right installer will be transparent, patient and confident in every answer.
Solar panels are a 25-year investment. Take the time to choose an installer who will be there for the full journey, not just installation day.
Ready to Go Solar with a Trusted Installer?
WattCharger is Ireland's trusted provider of solar panels, battery storage and EV chargers. We are SEAI-registered, Safe Electric certified, and proud to have over 100 five-star reviews on Trustpilot from Irish homeowners.
What you get with WattCharger:
- Free site assessment and transparent quotes
- SEAI grant application handled at no extra charge
- Tier 1 equipment with comprehensive warranties
- Expert installation by Safe Electric certified contractors
- Dedicated post-installation customer support
- Nationwide coverage across Ireland
Get started today:
- Free solar consultation: Contact WattCharger
- Learn about solar costs: How Long Does It Take to Recoup Your Solar Installation Cost in Ireland
- Explore battery storage: Battery Storage Guide
Make the smart choice. Choose an installer who answers every question with confidence, backs every promise with warranties, and supports you for the full 25-year lifespan of your solar system.
Blog Author: Rowan Egan