Solar panels companies

Choosing the right solar panel installer matters as much as choosing the right equipment. A good installation company ensures proper system design, quality workmanship, and reliable after-sales support. This guide explains what to look for when comparing solar companies in Ireland, how to identify reputable installers, and what questions to ask before committing.

At a glance

SEAI registration essential: Only registered companies can process grant applications
Get 3–4 quotes: Compare equipment, pricing, and service across multiple installers
Check reviews carefully: Look for patterns across Google, Trustpilot, and Irish forums
Verify experience: Ask about years in business and number of installations completed
Compare warranties: Equipment warranties and workmanship guarantees vary significantly
After-sales support: Some companies excel at service, others disappear after installation

Why the installer matters

Solar panels are a 25-year investment. The quality of installation directly affects system performance, longevity, and whether issues get resolved promptly. A poor installation can lead to water ingress, inefficient wiring, inverter failures, and grant application problems.

The installer you choose handles system design, equipment procurement, physical installation, electrical connection, SEAI grant application, and after-sales support. Their competence in each area determines whether you get a system that performs as expected for decades or one that causes ongoing frustration.

Unlike buying a car where the dealer and manufacturer provide separate support, with solar your installer is your primary point of contact for everything. Choose carefully.

SEAI registration: the non-negotiable requirement

Only SEAI-registered solar companies can submit grant applications on your behalf. Without SEAI registration, you cannot claim the €2,400 solar panel grant or the additional €600 battery grant.

Verify registration before getting quotes. Visit the SEAI website and search their registered contractor database. Enter the company name or registration number to confirm they’re currently registered and in good standing.

Some companies claim they “work with” SEAI-registered contractors or can “arrange” registration. This is a red flag. The company performing your installation must hold direct SEAI registration. Don’t proceed with unregistered installers regardless of price.

SEAI registration requires companies to meet minimum standards for qualifications, insurance, and compliance. It’s not a guarantee of quality, but it’s a baseline requirement you cannot compromise on.

Types of solar installation companies

Understanding the different types of companies helps set realistic expectations.

National solar companies

These larger operations advertise widely, have established brands, and install systems across multiple counties.

Advantages: Financial stability (less likely to disappear), established processes, consistent service standards, larger support teams, and extensive installation experience.

Disadvantages: Higher pricing due to marketing budgets and overhead costs, less flexibility on equipment choices, potentially slower response times due to higher customer volumes.

Best for: Homeowners who prioritize brand security and financial stability over price, or those who value standardized processes and documented procedures.

Regional installers

Medium-sized companies operating within specific regions or counties. They typically have smaller teams and lower overheads than national operations.

Advantages: More competitive pricing, local knowledge of planning requirements, personal service, flexibility on equipment selection, and often faster response to service requests.

Disadvantages: Variable quality depending on specific company, less financial cushion if business struggles, potentially limited service availability if they stop trading.

Best for: Homeowners comfortable researching company backgrounds carefully and who want better value without sacrificing quality.

Electrical contractors with solar services

General electrical contractors who’ve added solar installation to their service offerings.

Advantages: Existing relationship if you’ve used them before, immediate availability for electrical issues, potentially competitive pricing.

Disadvantages: Variable solar-specific experience, may subcontract actual installation, limited solar expertise, smaller volume of installations completed.

Best for: Situations where you already have a trusted electrician relationship, though verify their solar-specific experience and qualifications carefully.

What to check before choosing an installer

Due diligence before signing a contract prevents problems later.

Company experience and track record

Ask how long they’ve been installing solar panels specifically, not just how long they’ve been in business. A company might have 20 years as an electrical contractor but only two years installing solar.

Request the number of installations completed in the last 12 months. A company installing 100+ systems annually has refined processes and encountered most common issues. A company completing 10 installations annually is still learning.

Ask whether they employ their own installers or subcontract installation work. Direct employees typically provide better quality control than subcontractors.

Reviews and reputation

Check multiple review sources to get balanced perspectives.

Google reviews: Look for overall rating (4+ stars good) and read recent reviews (last 6 months). Pay attention to how companies respond to negative reviews—professional responses addressing concerns are positive signs.

Trustpilot: Independent review platform where reviews undergo verification. More reliable than company websites showing only selected testimonials.

Irish forums: Boards.ie, Reddit Ireland, and Facebook groups discussing solar often mention specific companies. These unfiltered discussions reveal recurring issues or consistent praise.

Patterns matter more than individual reviews: Every company gets occasional negative reviews. Look for repeated complaints about the same issues (poor communication, installation delays, warranty claim problems).

Financial stability

Solar installations are upfront payment with decades of reliance on the installer for warranty support. Financial instability creates risks.

Check company registration: Search the Companies Registration Office (cro.ie) to verify the company exists, how long it’s been registered, and whether it files accounts on time.

Look for concerning signs: Very aggressive pricing, pressure to pay full amount upfront, inability to provide references, vague about equipment specifications.

Consider company size: Larger companies typically have greater financial buffers to weather market changes. Smaller companies may offer better value but carry higher risk of business closure.

Equipment and warranties

What the company installs matters as much as how they install it.

Solar panels

Reputable companies use panels from established manufacturers with substantial warranties. Tier 1 panels from brands like Longi, JA Solar, Canadian Solar, and Jinko offer 25-year performance warranties.

Avoid companies pushing obscure panel brands with limited warranty backing. If the manufacturer disappears, your warranty becomes worthless regardless of its stated duration.

Inverters

The inverter is the most likely component to fail during your system’s life. Companies using quality inverter brands (SolarEdge, Huawei, GivEnergy, Solis) demonstrate commitment to reliability.

Ask about inverter warranties specifically. Most quality inverters carry 10-year warranties, with options to extend to 15 or 20 years for additional cost.

Installation workmanship

Separate from equipment warranties, ask about installation workmanship guarantees. Reputable companies warrant their installation work for at least 2–5 years, covering roof penetrations, electrical connections, and mounting system integrity.

Questions to ask potential installers

Use these questions to evaluate companies systematically.

Experience and credentials:

How long have you been installing solar panels in Ireland?
How many installations have you completed in the last 12 months?
Can you provide three recent customer references I can contact?
Do you employ your own installers or use subcontractors?

Equipment and warranties:

What brands of panels do you typically install?
What inverter options do you offer?
What are the full warranty terms for panels, inverters, and installation work?
Do you offer battery storage options?

Process and timeline:

What’s your typical timeline from quote to installation?
How do you handle SEAI grant applications?
What happens if there are delays or complications?
How long after installation until the grant is processed?

After-sales support:

How do I contact you if I have issues after installation?
What’s your typical response time for service requests?
How do you handle warranty claims?
Will my system have monitoring so I can track performance?

Companies that respond clearly and confidently to these questions demonstrate professionalism and experience. Vague answers or deflection suggest potential problems.

Comparing quotes effectively

You’ll receive quotes with varying structures and detail levels. Focus on meaningful comparison points rather than just headline prices.

Equipment specifications

Verify that quotes specify exact equipment models, not just generic descriptions. “10 panels” tells you nothing—you need manufacturer, model number, and wattage for each component.

Compare panel efficiency and warranties. A cheaper quote using lower-quality panels may cost more long-term through reduced output and earlier failures.

System design

Good quotes include roof layout diagrams showing panel placement, cable runs, and inverter location. This demonstrates that the company performed proper site assessment rather than providing generic pricing.

Ask about shading analysis if relevant. Quality companies use tools to calculate shading impact on annual generation.

Pricing breakdown

Total price matters, but cost per kW helps compare different system sizes. A €8,000 quote for 4kW (€2,000/kW) costs the same per kilowatt as a €10,000 quote for 5kW.

Check what’s included: scaffolding, electrical upgrades, monitoring systems, and SEAI grant application should all be covered in the quoted price.

Service and support

Ask about post-installation support explicitly. Some companies include annual system checks, while others charge separately. Remote monitoring access helps identify problems early.

Red flags to avoid

Certain behaviors signal unreliable companies.

Pressure tactics: Insisting you decide immediately, claiming special pricing expires today, or suggesting grant funding will end imminently. Reputable companies give you time to decide.

Inability to provide SEAI registration: Any hesitation or vague responses about SEAI registration means you should walk away immediately.

Extremely low pricing: If one quote is 30–40% below others, question why. It may involve inferior equipment, corner-cutting during installation, or the company is struggling financially.

Vague equipment specifications: Refusal to specify exact panel and inverter models suggests they’re shopping for cheapest available equipment after you sign.

Poor communication: If getting a quote takes weeks and requires multiple follow-ups, after-sales service will likely be similarly frustrating.

National versus local installers: which to choose?

Neither category is inherently better—quality varies within both groups.

Choose national companies if you:

Prioritize brand recognition and established reputation
Value standardized processes and documentation
Prefer financial security over competitive pricing
Want confidence the company will exist in 10+ years for warranty support

Choose local/regional companies if you:

Want more competitive pricing
Value personal service and direct communication
Are comfortable verifying reputation through research
Appreciate local knowledge of planning and installation quirks

Many homeowners find that regional companies offer the best balance of competitive pricing, quality workmanship, and personalized service. However, thorough due diligence remains essential regardless of company size.

Finding reputable companies

Start with the SEAI registered contractor list, then narrow options through research.

SEAI database: Filter by county to find registered companies operating in your area. This gives you 10–20 potential installers typically.

Online reviews: Cross-reference companies with reviews on Google, Trustpilot, and social media. Eliminate those with consistently poor reviews or unresolved complaints.

Recommendations: Ask neighbors with solar installations about their experience. Direct recommendations from people you trust carry weight.

Initial contact: Email or call several companies to gauge responsiveness. Those who respond promptly and professionally to inquiries typically maintain similar standards after sale.

Request quotes from 3–4 companies after this filtering process. This provides meaningful comparison without overwhelming yourself.

What good companies provide

Professional solar companies deliver comprehensive service:

Pre-installation: Detailed site survey, roof assessment, electrical system inspection, shading analysis, and accurate system design.

Quote and contract: Written quote with specific equipment models, clear pricing breakdown, realistic timeline, and transparent terms.

Installation: Professional workmanship, tidy site management, proper roof sealing, compliant electrical work, and thorough system testing.

Documentation: Installation certificates, warranty documentation, equipment manuals, monitoring system setup, and SEAI grant application.

After-sales: Responsive communication, prompt warranty claim handling, system performance monitoring, and troubleshooting support.

Companies failing to deliver these basics should be avoided regardless of price.

FAQ

How many quotes should I get?

Three to four quotes from SEAI-registered companies provides good comparison without overwhelming yourself. Fewer than three limits your ability to identify fair pricing, while more than four creates analysis paralysis without adding value.

Should I choose the cheapest quote?

Not necessarily. Equipment quality, company reputation, warranties, and after-sales support matter significantly. The cheapest quote often uses lower-quality components or comes from companies with concerning reputations. Mid-range quotes typically offer the best balance of value and quality.

Do bigger companies charge more?

Often yes, due to higher overheads for marketing, offices, and larger teams. However, they may offer better financial stability and more structured support. Evaluate whether the premium justifies the additional security for your circumstances.

What if the company goes out of business?

Equipment warranties (panels, inverters) remain valid through manufacturers regardless of installer business status. Installation workmanship warranties become worthless if the company closes. This risk makes company financial stability an important selection criterion.

How do I verify SEAI registration?

Visit seai.ie, navigate to the grants section, and search the registered contractor database. Enter the company name or registration number they provide. Confirm registration status is active before proceeding with quotes.

Choosing the right solar installer requires research and comparison. Focus on SEAI registration, company reputation, equipment quality, and after-sales support rather than price alone. The difference between a good and poor installer affects your system’s performance and your satisfaction for the next 25 years.

Related guides:

Solar panels in Ireland – comprehensive solar guide
Solar panel installation – what the installation process involves
Solar panel costs – pricing and what affects costs