Why Direct Installers Hate 'Margin Games' Being Exposed

Here is the uncomfortable truth the industry would rather you didn't dwell on: the panels and inverter in a typical $11,000 fully installed 5kW system cost the installer somewhere in the region of $3,000 to $4,500 at wholesale. The rest is labour, compliance, overheads, a fair margin, and sometimes a margin that is anything but fair. A fully installed 5kW system runs roughly $9,000 to $13,000 in 2025 (around $1.80 to $2.40 per watt), consistent with MBIE pricing data and current NZ installer quotes. Understanding where that money actually goes is the single most powerful thing you can do before you sign anything.

None of this means installers are crooks. Most are honest tradespeople running a real business with real costs. But the gap between what gear costs wholesale and what you pay retail is where the good operators earn an honest living and the sharp operators quietly print money. Knowing the difference protects your wallet.

What's actually inside the price of a solar system

A solar quote looks like one number, but it is really five things bundled together. When you can see the parts, you can spot when one of them has been inflated.

• Panels: the single biggest visible item, but cheaper per watt than most people assume.
• Inverter (and battery, if fitted): the brains, and the part most likely to need replacing in 10 to 15 years.
• Mounting, cabling, isolators and balance-of-system: the unglamorous bits that hold it all together.
• Labour and installation: qualified electricians, scaffolding, roof time.
• Overheads and margin: the sales team, the office, the warranty reserve, the profit.

Here is the part installers don't volunteer: the hardware is often the smallest slice. The biggest variable between a fair quote and a fleecing isn't the panels at all. It's the margin layered on top, and how honestly it's presented.

The wholesale reality, in plain numbers

Let's put rough 2025 NZ wholesale figures on the table. These are indicative trade-level costs, not retail prices, and they move around with the exchange rate and shipping. But they give you the shape of the thing.

• Tier-one panels: roughly $0.35 to $0.60 per watt at wholesale. A 5kW array of panels is therefore around $1,750 to $3,000 in hardware.
• A quality single-phase string inverter (5kW): roughly $1,200 to $2,200 wholesale.
• Mounting, cabling, isolators and consumables: roughly $800 to $1,500.

Add those up and the raw hardware on a 5kW system sits in the $3,750 to $6,700 range. Now add genuine, legitimate costs that any honest business must charge for:

• Licensed electrical labour and install time: typically $1,500 to $3,000 for a straightforward single-storey job, more for two-storey, steep, or tricky roofs.
• Scaffolding or height safety: $500 to $2,000 depending on the property and your region's requirements.
• Design, consenting, network application and inspection: real administrative time, plus the lines company connection process.
• Warranty reserve and business overhead: the cost of being around in 15 years to honour a workmanship warranty.

That's why a fair, fully installed 5kW system genuinely lands around $9,000 to $13,000. A reputable installer is not gouging you at that price. They are running a business. The problem starts when the same system is sold for $16,000 or $18,000 with a sales rep's commission baked invisibly into the number.

The margin games, named plainly

Here is where we earn our keep. These are the specific tactics that turn a fair price into a fleecing, and almost nobody in the trade will spell them out for you.

1. The "premium panel" anchor

A salesperson quotes you a frighteningly expensive "premium" system, lets you flinch, then offers a "discount" down to a number that is still well above fair value. The discount feels like a win. It isn't. The original number was never real; it existed only to make the second number look generous. The panels in both quotes often come off the same shipping container.

2. Bundling so you can't compare

The classic. Everything is rolled into a single price with no line items, so you cannot see what the inverter costs, what the install costs, or what margin sits on top. When you ask for a breakdown and get told "we don't itemise, it's a package," that is the game working as intended. A quote you cannot dissect is a quote designed not to be dissected.

3. Oversizing the system

More kilowatts means more margin dollars, even at the same percentage. If your home uses very little power during the day, a 10kW system that exports most of its generation at a buy-back rate of around 7 to 17 cents per kWh (the going range across NZ retailers, well below the 28 to 38 cents you pay to buy power) is not doing you a favour. It's doing the installer one. We dig into exactly how the self-consumption maths works in our solar cost and ROI calculator, and it routinely surprises people.

4. The finance markup

Some operators offer "interest-free" or low-rate finance, then quietly lift the cash price to fund the interest they're "absorbing." You pay the interest either way; it's just been moved into the sticker price where you can't see it. Always ask for the cash price and the finance price separately. If they're identical, ask who's paying the lender.

5. The commission you never see

This is the big one, and it's the reason high-pressure door-knocking and "today only" sign-up deals exist at all. When a system is sold by a commissioned rep rather than quoted by the people doing the install, a slice of your money goes to the person who talked you into it. That commission can run into the thousands. The harder the sell, the more likely there's a commission funding it. Honest installers quote, answer questions, and let the numbers do the talking. They don't need a closer.

Why some installers genuinely hate this being explained

Most installers are perfectly happy for you to understand pricing, because their pricing holds up. A good operator will walk you through the breakdown without flinching. They've nothing to hide.

The ones who bristle are the ones whose margin depends on you not asking. If a business model only works when the customer can't see the parts, the customer seeing the parts is an existential threat. That's the whole reason we publish wholesale ranges out loud. Transparency costs the honest operator nothing and costs the sharp operator their best trick.

We've set out exactly what we stand for, and why we put homeowners first every time, in our promise to New Zealand homeowners. The short version: we'd rather you bought a fairly priced system from a competitor than an overpriced one through us.

A worked example: two quotes, same gear

Picture a 1970s brick-and-tile place in Rolleston, single storey, simple north-facing roof, on the Orion network. Two installers quote a 6.6kW system with the same tier-one panels and the same reputable inverter.

Quote A (the honest one): $12,500. Itemised. Panels and inverter clearly listed, install labour shown, scaffolding shown, network connection shown, a modest margin you can live with. The rep is the electrician who'll be on your roof.

Quote B (the margin game): $18,900. Single bundled number. "Premium installation package." Was "$22,000," now "specially discounted." Interest-free finance available. Sold by a rep who doesn't install and won't be back.

The hardware in both is nearly identical, costing the installer roughly $4,500 to $5,500. The $6,400 gap between the two quotes is almost entirely commission, marketing spend, and margin. On a system that might save the household around $1,000 to $1,800 a year (depending on daytime usage and self-consumption), that overpayment adds three to six years to the payback. Same panels. Same sun. Wildly different deal.

This is the core insight: in solar, the equipment quality often matters less to your payback than the margin you agreed to pay. Two homes with identical hardware can have completely different returns, decided entirely at the point of signature.

How to read a quote so the games don't work

You don't need to be a sparky to protect yourself. You need to insist on seeing the parts and ask a few pointed questions.

• Demand an itemised quote. Panels (brand, model, count, wattage), inverter (brand, model), mounting, labour, scaffolding, and network connection as separate lines. "We don't itemise" is your answer right there.
• Check the price per watt. Divide the total by the system size in watts. Anything materially above $2.40 per watt for a standard install deserves a hard explanation.
• Ask for cash price and finance price separately. If "interest-free" doesn't lower the cash price, you're paying the interest in disguise.
• Right-size before you upsize. Match the system to your actual daytime usage, not to the biggest array that fits the roof. Run your own numbers in the ROI calculator first.
• Find out who's quoting. Commissioned salesperson or the installer? The answer tells you a lot about where your money's going.
• Get three quotes. Nothing exposes a margin game faster than two honest quotes sitting beside the inflated one.

If you want the full set of red flags, we've put together a plain-English solar scam checklist that covers the high-pressure tactics, the phantom discounts, and the warranty traps in detail. And if you're wondering how we decide who's actually worth recommending, our 13-step installer vetting process lays the whole thing out.

Where solar genuinely doesn't pencil out

We're on your side, and that means being straight about when not to buy, regardless of how good the price is.

• If you use almost no power during daylight hours and you're out at work all day with nobody home, you'll export most of your generation at a buy-back rate far below what you pay to import. The maths gets thin fast without a battery, and batteries change the equation considerably.
• If you're planning to move within a couple of years, you may not recover the cost. Solar can lift a sale price, but rarely by the full system cost.
• If your roof is heavily shaded by a neighbour's trees, a chimney, or a two-storey extension, your generation will disappoint no matter how good the panels are.
• If you're renting, the investment logic almost never works in your favour, full stop.

A genuinely good installer will tell you these things and walk away from a sale that isn't right for you. A margin-game operator will sell you the system anyway, because their interest ends the moment you sign.

The honest margin is not the enemy

Let's be fair to the trade. An installer who clears a healthy, transparent margin on a well-designed system is exactly who you want to buy from. Margin funds the warranty support, the qualified labour, the business that's still answering the phone in 2035 when your inverter throws an error. A suspiciously rock-bottom price can be its own warning sign: someone has to be cutting a corner, and it's usually the workmanship or the warranty backing.

The goal isn't the lowest possible number. It's a fair number from a business that will stand behind the work. The difference between fair margin and a margin game is transparency. Fair margin survives an itemised quote. A margin game doesn't.

Frequently Asked Questions

What is a fair price for a fully installed solar system in NZ in 2025?

For a standard single-storey install, roughly $9,000 to $13,000 for a 5kW to 6.6kW system, which works out around $1.80 to $2.40 per watt, in line with MBIE pricing data and current installer quotes. Two-storey homes, steep roofs, or systems needing extra scaffolding sit at the higher end legitimately. Anything materially above that range deserves a clear, itemised explanation.

How much do solar panels actually cost the installer at wholesale?

Tier-one panels run roughly $0.35 to $0.60 per watt at trade level in 2025, so the panels for a 5kW array cost the installer somewhere around $1,750 to $3,000. The inverter adds roughly $1,200 to $2,200 wholesale. These are indicative figures that shift with the exchange rate and shipping, but they show the hardware is a smaller slice of your total than most people expect.

Why won't some installers give me an itemised quote?

The honest reason is sometimes administrative simplicity. The less honest reason is that an itemised quote lets you see the margin and compare like for like. If an installer flatly refuses to break the price into panels, inverter, labour, and connection, treat that as a signal and get other quotes you can actually compare.

Is "interest-free finance" on solar genuinely free?

Rarely. Someone always pays the lender. If the cash price and the finance price are identical, the interest has usually been folded into the sticker price, so you're paying it without seeing it. Always ask for the cash price and the financed price separately, then decide whether the finance is worth it to you.

Does a bigger system always mean better value?

No. A larger system generates more, but if you're exporting most of that extra power at a buy-back rate of around 7 to 17 cents per kWh while paying 28 to 38 cents to import, the economics weaken quickly. The right size matches your actual daytime usage. Bigger mostly benefits the seller's margin unless you genuinely consume the extra generation or add a battery.

How do I know if a quote includes a sales commission?

Ask directly whether the person quoting also installs, or whether they're a sales representative. High-pressure tactics, "today only" pricing, and phantom discounts are strong signals that a commission is funding the sale. Installers who quote and let the numbers speak generally don't carry that cost.

Are cheaper solar quotes a warning sign?

They can be. A price well below the fair range usually means a corner is being cut somewhere: lower-quality components, a thinner workmanship warranty, or a business unlikely to be around for support down the track. Aim for a fair, transparent price from a reputable installer rather than the lowest number on the page.

Where can I check independent guidance on solar costs?

EECA (Energy Efficiency and Conservation Authority) publishes consumer-facing solar information, MBIE tracks energy pricing, and Consumer NZ regularly reviews solar buying. Cross-checking your quotes against independent sources is one of the simplest ways to keep a margin game from working on you.

The bottom line

Solar is genuinely good value for a lot of New Zealand homes. The hardware isn't where you get caught; the margin is. When you can see the parts of a quote, name the games, and compare three honest numbers side by side, the sharp operators lose their edge and the good installers win on merit, which is exactly how it should be.

Do two things before you sign anything. Run your own figures so you know what your roof should pay back, which you can do in our ROI calculator, and read up on the warning signs in our solar scam checklist so the phantom discounts and pressure tactics roll right off you. Walk in informed, and a fair deal is well within reach.

What to Do Next

Start by working out the right size for your home, not the biggest array a salesperson can fit on your roof. A quick run through our ROI calculator gives you a realistic payback figure to test every quote against.

Then gather three itemised quotes and lay them side by side. Check the price per watt, ask for cash and finance prices separately, and find out whether the person quoting is the one doing the install. If anything refuses to break down into parts, that's your signal to keep looking. With our solar scam checklist in hand and a fair price in front of you, you're in exactly the right spot to buy well.