Searching for the best solar panel installers Ireland has to offer usually turns up ranked lists, but there’s no official ranking, and “best” depends on your roof, budget and the service you want. What you can do is check the things that are verifiable: registration, certification, the quality of the quote and the contract terms. This guide shows how, using guidance from SEAI, the CRU and the CCPC. Checked 26 October 2026. We don’t rank or endorse any named company.
Best solar panel installers Ireland: what to look for
A good installer for you is one that is properly registered, designs the system around your actual usage, quotes clearly, puts warranties in writing and is still around to honour them. Price matters, but a cheap quote from a company that cuts corners isn’t a bargain. In practice, look for:
- SEAI registration for the solar PV grant scheme
- Electrical work done by a Registered Electrical Contractor
- A site survey before a firm price
- A design based on your bills and roof, with an annual production estimate
- An itemised quote with named products and warranties
- Fair payment terms and a written contract
Step 1: check registration
SEAI registration. To get the domestic grant, “You must select an SEAI registered company” (SEAI). Businesses need a company registered for the Non-Domestic Microgen scheme (SEAI). Check the company is currently registered before you sign, and that the company named on your grant approval matches your contract. Our solar grants guide explains each scheme.
Safe Electric. The CRU says you should always use a Registered Electrical Contractor (REC) for electrical work in your home, and that this is required by law. RECs must issue a Completion Certificate, and you can find them on the Safe Electric register (CRU). ESB Networks also requires a micro-generator to be installed by a registered electrical contractor (ESB Networks).
Products on the register. Since 6 January 2025, ESB Networks says installers should choose devices recorded on its Low Carbon Technology Register, which covers inverter-connected generation and battery storage (ESB Networks). Ask for the register reference for your inverter and battery.
Step 2: judge the survey and design
SEAI’s Homeowner’s Guide to Solar PV says the company should give you a specific design and payback for your house, and lists questions every installer should answer: how much energy the system will produce in a year, the total cost, ongoing service costs, the warranty, whether your roof and demand suit PV, and whether planning permission is needed. A strong installer will:
- Ask for your recent bills or smart-meter data, not just your roof size
- Assess shading; SEAI says objects within 10 metres can greatly reduce output
- Check roof condition and how panels will be fixed without drilling tiles
- Explain whether a battery or diverter makes sense for your usage, with prices both ways
- State the inverter size and confirm it fits the ESB Networks micro-generation limits
Be wary of anyone who quotes a firm price over the phone without seeing your roof or asking about your usage.
Step 3: compare quotes like for like
| Check | What to look for |
|---|---|
| Products | Exact panel, inverter and battery models and quantities, with datasheets |
| Price | Total price, grant shown separately, VAT treatment stated |
| Cost per kWp | Total price divided by system size, so different sizes compare fairly |
| Production estimate | Annual kWh, ideally with a monthly breakdown and stated assumptions |
| Inclusions | Scaffolding, consumer unit work, bird proofing, NC6, grant paperwork, BER |
| Warranties | Panel product and performance, inverter, battery and workmanship, in years |
| Payment terms | Deposit size, stage payments and what’s due on completion |
SEAI’s typical cost of €1,700–€2,500 per kWp (SEAI) helps you sense-check. A quote far outside that range deserves questions either way. For a full side-by-side template, see our compare solar quotes guide, and our questions to ask a solar installer checklist covers what to ask on the call.
Step 4: red flags
The CCPC advises caution about pressure to decide quickly, unusual payment requests, prices far below other quotes and reviews that are all five-star (CCPC). For solar specifically, also watch for:
- Offers to start work before your SEAI approval arrives. SEAI says you can’t apply once grant-aided works have started, so this can cost you the grant.
- Grant amounts that don’t match SEAI’s published figures (currently up to €1,800 for panels and €600 for a battery).
- Vague product descriptions such as “tier 1 panels” with no model number.
- Savings claims with no stated electricity price, export rate or self-consumption assumption.
- Large upfront payments. The CCPC suggests avoiding paying the full cost before the work is complete and paying in stages on bigger jobs.
Step 5: get the contract right
Before you pay a deposit, the CCPC recommends getting in writing the agreed price, estimated completion date, payment structure and a detailed description of the work (CCPC). Under the Consumer Rights Act 2022, work should be carried out with reasonable care and to the agreed standard. If it isn’t, the trader should offer a repair, a refund or a price reduction, and you can withhold payment until the issue is resolved. Pay by a method that leaves a record.
Reviews and recommendations
Recommendations from neighbours who’ve had solar for a year or more are valuable, because they’ve seen the aftercare as well as the install. Ask them how the system performs against the estimate, how quickly the installer responded to any problems, and whether the paperwork (NC6, completion certificate, grant documents) was handled on time. Treat online reviews as one input among several, and weigh them against the verifiable checks above.
Do you need a big company or a local one?
Neither size is automatically better. A larger firm may have more crews and a longer track record; a smaller local firm may offer more personal aftercare. What matters is that the company is registered, insured, gives clear warranties and has a realistic plan for service calls. Ask who you’ll contact if the inverter shows a fault in year three, and how quickly they typically respond. If you’re still deciding what system you need, our solar panels for homes guide covers the options before you talk to installers.
FAQs
Is there an official list of the best solar installers in Ireland?
No. SEAI publishes which companies are registered for its grants, but it doesn’t rank them. Any “top 10” list is someone’s opinion.
Does the installer have to be SEAI-registered?
Yes, if you want the SEAI grant. The electrical work must also be done by a Registered Electrical Contractor.
How many quotes should I get?
The CCPC recommends written quotes from more than one contractor. Two or three is a sensible number for a home system.
How big a deposit is reasonable?
There’s no fixed rule. The CCPC advises caution about large upfront sums and suggests stage payments for bigger jobs, with the full balance due only on completion.
Should I choose the cheapest quote?
Not automatically. Compare cost per kWp, named products, warranties and inclusions first. A low price that leaves out scaffolding or paperwork can end up costing more.
Get your solar quote today
Get your solar quote today. We’ll match you with SEAI-registered installers so you can compare itemised quotes side by side, with no obligation. Questions first? Call 089 450 4544.
