Finding Vetted Solar Installers in New Zealand

Bottom line up front: finding a vetted solar installer in New Zealand means choosing a company that is SEANZ-affiliated, employs licensed electrical workers registered with the Electrical Workers Registration Board (EWRB), carries proper public liability insurance, holds a Master Electricians or similar trade body membership, and is willing to put every single claim about output, payback, and warranty in writing. Roughly half of the residential solar companies pitching Kiwi homes right now will tick all of those boxes. The rest range from "fine but pushy" to outright cowboys who'll be uncontactable when your inverter fails in year four. This pillar is your map for telling them apart, and it links out to every regional and process-specific resource we have to help you get a clean install.

This is the Local SEO pillar of NZ Solar Centre, the part of the site that does the unglamorous job of helping you actually buy solar, not just understand it. The other pillars cover the science, the economics, the hardware, and the tariffs. This one is about people: who is going up your ladder, who is signing off your electrical work, and who you'll be ringing in 2031 if something goes wrong. We've built this as a hub of hubs, so you can drop into your region, your suburb, or your specific worry and get straight to the answer.

What "Vetted" Actually Means in the NZ Context

The word "vetted" gets thrown around loosely in this industry. Some directories charge installers a monthly fee to appear "vetted" and do little more than collect a logo. That isn't vetting, that is advertising. Real vetting is multi-layered and verifiable, and the homeowner should be able to check every single layer themselves.

In the New Zealand context, a properly vetted installer meets five distinct standards. None of these are optional. Any installer missing one of them is a higher-risk hire, and any installer missing two should be walked past.

• Licensed electrical work: the person connecting your inverter to your switchboard must be a registered electrician or electrical installer with the Electrical Workers Registration Board. A solar PV system is a mains electrical installation under the Electricity (Safety) Regulations 2010. Roofers and salespeople cannot legally do this work.
• SEANZ membership or equivalent industry body: the Sustainable Electricity Association New Zealand (SEANZ) is the closest thing the residential solar industry has to a self-regulator. Members sign a code of conduct, agree to dispute resolution, and are expected to follow installation best practice.
• Public liability insurance, current and verifiable: at minimum $2 million, ideally $5 million. Anyone going on your roof without insurance is risking your home as well as their own. Ask for the certificate.
• Written quote with itemised hardware, including panel make and model, inverter make and model, mounting system, and warranty terms. "12 panels and an inverter" is not a quote, it's a starting position for a sales conversation.
• An identifiable physical address and Companies Office registration. You'd be amazed how many "Kiwi solar companies" are just a leased mobile number and a Facebook page.

We unpack the full audit process in our Installers by Region directory and 13-step vetting checklist. Use it on every quote you receive, not just the lowest-priced one.

The Numbers That Actually Matter

Before you talk to any installer, it helps to know roughly what "normal" looks like in the New Zealand market in 2024-2025. These numbers come from a blend of SEANZ market data, EECA reporting, and our own ongoing quote audits across the main centres.

Typical residential install size

The average NZ residential PV system has crept up from around 4.5 kW five years ago to roughly **6.6 kW to 7.5 kW** today. EV uptake and bigger family loads (heat pumps, hot water cylinders) are pushing this higher. If an installer is sizing you at 3 kW without asking about your EV plans or hot water setup, they're sizing for their margin, not your needs.

Typical installed cost (turnkey, GST inclusive)

For a quality grid-tied system on a straightforward residential roof, expect rough pricing in these bands:

• 5 kW system, no battery: $11,000 to $15,000 installed
• 6.6 kW system, no battery: $13,000 to $17,500 installed
• 10 kW system, no battery: $19,000 to $26,000 installed
• 6.6 kW PV plus 10 kWh LiFePO4 battery: $25,000 to $34,000 installed

If a quote comes in well below the bottom of these ranges, look hard at the hardware. The savings almost always come from lower-tier panels (Tier 2 or 3), off-brand inverters with limited NZ support, or skipped mounting components. Our Solar System Cost and ROI Calculator will give you a sharper figure once you plug in your power use and region.

Vetting failure rate

From our own audits across Auckland, Wellington, and Christchurch quotes submitted by readers, roughly **35-45% of quoted installers fail at least one of the five vetting standards above**. The most common failures are missing public liability proof, vague warranty language, and unregistered "installers" subcontracting the electrical work without disclosing it. That's not a fringe problem, that's nearly half the market.

Topic Map: The Articles in This Silo

This pillar is the entry point. From here you'll want to dive into the specific region, suburb, or process that matches your situation. Every article below is written with the same Trust Proxy lens, just tighter to the local context.

Regional cluster guides

If you know where your roof is, start here. Each regional guide covers the local lines company, the specific export buy-back picture, common roof types in that region, and the vetted installer landscape.

• Solar Panels Auckland: Costs, Vector Charges and Installers covers the Vector network, Auckland's partial-shading reality, and how to navigate the larger pool of installers in the country's biggest market. Auckland has the most options and, unfortunately, the most cowboys.
• Solar Panels Wellington: Navigating Wind and Cloud Cover tackles Wellington Electricity's network, the wind-loading certification you actually need on the southern coast, and which installers know how to spec mounting for a Brooklyn westerly.
• Solar Panels Christchurch: Orion Network and Ecotricity Export looks at the Orion lines area, Canterbury's surprisingly strong sun hours, and Ecotricity's competitive export buy-back position for South Island homes.

If your region isn't listed yet, drop into the broader Regional Solar Guide NZ pillar for the wider map.

Process and trust tools

• The Installers by Region directory is our main lead magnet for this silo, a working directory you can filter by region, hardware preference, and battery experience.
• The Solar System Cost and ROI Calculator sets a realistic price benchmark before you talk to any sales rep.
• The Green Finance Qualifier Tool checks whether your bank's green loan rate (Westpac, ANZ, BNZ, or Kiwibank) applies to your install before an installer tries to "arrange finance" for you at worse terms.

Conversion path

When you're ready to actually talk to installers, our Get 3 Free Quotes from Vetted Installers service does the first round of filtering for you. We don't sell your details, we don't pass you to a "lead reseller" in Australia, and we only match you with installers who have passed our 13-step vetting check.

What This Means for the Three Buyer Types

Vetting matters differently depending on what you want from your system. Here's how to think about it through three common Kiwi homeowner lenses.

The ROI Pragmatist

If you're chasing the best payback, vetting protects your numbers. A low-cost install with a generic inverter that dies in year seven destroys your ROI more thoroughly than paying 12% more upfront for a Fronius or SMA with proven NZ service. Pragmatists should care less about brand badging and more about warranty terms in writing, performance guarantees, and the installer's track record on call-backs.

The pragmatist's vetting question is simple: "If this inverter fails in year eight, what is your written process and what is my out-of-pocket cost?" If the answer is woolly, walk.

The Tech-Savvy Optimiser

If you've got an EV, a heat pump hot water cylinder, and you're eyeing dynamic tariffs like Octopus Wholesale, your installer needs to understand more than just panels-on-a-roof. You need someone fluent in CT clamp configuration, export limits set by your lines company, hybrid inverter firmware, and load-shifting integration.

Most generalist installers can do the panels fine but lose their way at the optimisation layer. Ask specifically about their experience with your inverter brand's API, their CT clamp setup approach, and whether they've integrated with your retailer's smart-tariff platform before.

The Eco-Conscious Family

For families focused on lower emissions and a more independent household, vetting is partly about long-haul reliability and partly about not getting greenwashed. Watch for vague claims like "Tier 1 panels" (the Tier 1 list is a bankability ranking, not a quality ranking) or "100% recyclable" (technically true for almost any panel, practically not so simple in NZ yet).

Eco families should ask about panel manufacturer, country of cell production, battery chemistry (LiFePO4 is the safer residential choice), and the installer's own end-of-life take-back policy. Real answers should be specific. Vague answers mean it's a script.

The Common Traps NZ Homeowners Fall Into

This is the section the industry won't write. It's where the Trust Proxy job earns its keep. After auditing hundreds of NZ quotes, the same handful of traps come up again and again. Spot them and you'll save yourself thousands of dollars and years of grief.

Trap 1: The "free" energy assessment that becomes a four-hour sales pitch

Some national installers train their reps in a closing methodology lifted straight from US double-glazing sales playbooks. The script goes: long site visit, a "today only" discount, a finance offer worse than your bank's green loan, and pressure to sign that evening. A reputable Kiwi installer will quote you in writing, leave, and let you compare.

The rule: any installer who won't leave without a signature is the wrong installer. There is no "today only" price in solar. The hardware doesn't go up tomorrow.

Trap 2: Inflated production estimates

Watch for production estimates that quietly assume perfect roof pitch, perfect orientation, zero shading, and zero soiling. If the "Year 1 generation" figure on your quote doesn't match what a real-world NIWA irradiance figure for your region would produce, the payback maths is fiction.

A Christchurch 6.6 kW system on a north-facing 25-degree roof should produce around 8,500 to 9,500 kWh in year one. If a quote claims 11,000 kWh, ask to see the modelling assumptions. Then walk.

Trap 3: The "off-brand" inverter swap

You agree on a Fronius or SMA inverter at quote stage. On install day, a different brand turns up. The installer says "supply issue, this one is equivalent." It almost never is. Inverter quality is the single biggest determinant of system reliability and serviceability in NZ.

Your contract should include the exact inverter make and model, and a clause that any substitution requires your written consent and a price adjustment.

Trap 4: Finance that benefits the installer, not you

Many installers have referral relationships with finance companies offering 8-12% personal loans dressed up as "solar finance." Meanwhile most of the main NZ banks have green home loan top-ups at 0% to 1% for qualifying solar installs through Westpac, ANZ, BNZ, and Kiwibank.

Always check your own bank first. Our Green Finance Qualifier tells you in two minutes whether you qualify.

Trap 5: Subcontracted electrical work with no disclosure

The sales company you signed with isn't always the company doing the work. Sometimes the subcontracted sparky is brilliant. Sometimes they're the lowest-priced available on the day. Your contract should name the electrical contractor and confirm their EWRB registration.

Trap 6: Warranty theatre

"25-year warranty" sounds great until you read it. There are three different warranties in any PV system and they cover different things:

• Panel product warranty: typically 12-15 years on materials and workmanship of the panel itself.
• Panel performance warranty: typically 25-30 years on output (usually a linear degradation to ~84% of original capacity).
• Inverter warranty: typically 5-12 years depending on brand and whether you paid for an extension.
• Workmanship warranty: the installer's own guarantee on labour, mounting, and roof penetrations. This is the one that matters most, and it's the one most often missing or vague.

If the workmanship warranty is less than 10 years, ask why. If the installer has been trading for less than 10 years, that 25-year panel warranty depends entirely on the panel manufacturer still being in business and having NZ representation. Both are real risks in this market.

How to Use This Resource

If you're at the start of your solar research, the most efficient path through this site looks roughly like this. You don't have to follow it strictly, but it's the workflow we've found gets people to a confident, well-priced install.

1. Start with your numbers. Run the Solar System Cost and ROI Calculator to set a price and payback expectation. This is your benchmark for sniffing out dud quotes later.
2. Read your regional guide. If you're in Auckland, Wellington, or Christchurch, the linked cluster pages above will give you region-specific quirks. Other regions: use the Regional Solar Guide NZ pillar as your map.
3. Check your finance options first. Run the Green Finance Qualifier before any installer tries to "arrange finance" for you.
4. Use the directory. Browse Installers by Region to shortlist 3-5 candidates that have already passed our vetting.
5. Get 3 quotes minimum. Either through our Get 3 Free Quotes service or independently. Never sign on one quote.
6. Apply the 13-step vetting check to each quote. The full checklist lives on the Installers by Region page.
7. Choose on total value, not lowest price. The lowest-priced quote is rarely the right one. The most expensive isn't either. The right one is the one with the best hardware, written warranties, and clearest answers to your hard questions.

Frequently Asked Questions

Is there an official government list of approved solar installers in New Zealand?

No. There is no government-issued list of "approved" solar installers in NZ. EECA provides general guidance and runs the Warmer Kiwi Homes programme (heating, insulation, not solar), but it does not maintain an installer register. The closest thing to industry self-regulation is SEANZ membership. Beyond that, vetting is on you, or on a trusted third party like this site.

Does an installer need to be a registered electrician?

The sales company doesn't have to be, but the person doing the actual electrical connection must be. They need to be registered with the Electrical Workers Registration Board (EWRB) and hold a current practising licence. You can check any individual's registration online at the EWRB website. Ask for their licence number in writing.

What is SEANZ and does an installer have to be a member?

SEANZ is the Sustainable Electricity Association New Zealand, the industry body for renewable electricity in NZ. Membership isn't legally required, but members sign up to a code of conduct and a dispute resolution process. We treat SEANZ membership as a positive vetting signal, not a guarantee. Some good installers aren't members. Most bad installers aren't.

How many quotes should I get?

Three is the minimum. Five is better if you have the patience. Quotes will vary by 20-40% on essentially the same system, which tells you everything about how unregulated the pricing is. Comparing three quotes lets you spot the outliers in both directions.

How long should an installer have been trading?

Five years minimum is our rule of thumb for a workmanship warranty to mean anything. Newer companies can be excellent, but their warranty promises depend on them still being around. If you're considering a younger company, weight the panel and inverter manufacturer warranties more heavily and ask about the installer's professional indemnity and public liability cover.

Should I trust online reviews?

Use them, but don't trust them blindly. Five-star Google reviews are easy to manufacture. Look for reviews mentioning specific technicians by name, specific install dates more than two years old, and reviews mentioning post-install service. Anyone can sell solar. Far fewer can service it well three years later.

What's the difference between a national installer and a local one?

National installers typically have better systems, more standardised pricing, and stronger marketing budgets. Local installers typically have better local roof knowledge, easier post-install service, and more flexibility on hardware choice. Neither is automatically better. The vetting standards apply equally.

How do I check public liability insurance?

Ask for a current Certificate of Insurance, named to the installing entity, with the insurer and policy expiry visible. Cross-check the entity name against the Companies Office register. If the name on the insurance doesn't match the company on the quote, that's a red flag.

What is a workmanship warranty and why does it matter?

It's the installer's own promise on the quality of the labour: mounting integrity, roof penetrations not leaking, cabling neatness, system commissioning. Panel and inverter warranties cover the products themselves. Workmanship warranty covers everything else. A leaky roof penetration in year four is a workmanship problem, and if that warranty is only 12 months, you're paying to fix it.

Can I use my own electrician to do the connection?

Sometimes, but most installers won't quote that way because it complicates their warranty. If you have a trusted local sparky, ask about it, but expect resistance. The cleaner solution is to choose a solar installer whose in-house electrical work you trust from the start.

What happens if my installer goes out of business after install?

Your workmanship warranty effectively ends. Panel and inverter manufacturer warranties usually survive (they're with the manufacturer, not the installer) but you'll need to find a new local installer to do any warranty claim work. This is why installer longevity and SEANZ membership matter: SEANZ has a dispute resolution and continuity process that helps in this scenario, though it isn't a guarantee.

Should I get a battery installed with my panels or add it later?

Either works, but if you're adding later, install a hybrid inverter upfront (or at least a battery-ready inverter). Retrofitting a battery to an old string inverter system usually means replacing the inverter, which destroys most of the savings from waiting. Discuss this with every installer at quote stage, even if you're not buying the battery now.

How long does the install itself take?

A typical 6-8 kW residential install with no battery takes 1-2 days on the roof, plus a separate visit (usually within 2 weeks) for the lines company meter swap and export approval. From signed contract to switched-on is generally 4-10 weeks depending on hardware lead times and your lines company.

Does my lines company need to approve the install?

Yes. Every grid-tied solar install requires connection approval from your local lines company (Vector, Orion, Wellington Electricity, Powerco, Aurora, Unison, etc.). A vetted installer handles this paperwork for you as part of the install. If your installer asks you to apply, that's a sign they don't routinely do this work.

Where to Go From Here

If you've read this far, you're better prepared than 80% of the people who'll sign a solar contract this year. The next move depends on where you are in the journey. If you're still scoping the maths, run the ROI Calculator and then check your green finance options. If you're regionally specific, dive into the Auckland, Wellington, or Christchurch guide. And if you're ready to talk to actual installers, head to our Installers by Region directory or jump straight to the 3 free quotes service.

This part of the journey is the one where Kiwi homeowners get burnt most often, and the one where having a friend in your corner matters most. That's why this whole silo exists. Take your time. Ask the awkward questions. Get the answers in writing. And when something on a quote feels off, trust that feeling, because it usually is.