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Two solar quotes can land in your inbox on the same day, both for a “6.6 kW system”, and be thousands of dollars apart. The cheaper one looks like the obvious winner. Sometimes it is. Often it’s missing something the other quote has priced in, or it’s been written in a way that makes the gaps hard to spot.

This guide is about reading the quote itself. It won’t tell you who to buy from. It will show you what to look for, what vague wording usually means, and which questions are worth asking before you sign anything.

Quick Answer: What Are The Biggest Solar Quote Red Flags?

The most common solar quote red flags are:

• Panel and inverter brands or model numbers that aren’t named
• A single lump-sum price with no breakdown
• An STC discount that isn’t shown, or is much larger than you’d expect
• Exclusions buried in the fine print (switchboard upgrades, scaffolding, meter work)
• Warranty terms that are summarised as “10 years” without saying who honours them or what’s covered
• A large upfront deposit, or payment due before any work starts
• Pressure to accept “today only” pricing

Any one of these doesn’t automatically mean the quote is bad. It means you should ask questions until the answer is clear and in writing.

What A Good Solar Quote Should Clearly Show

A good quote is boring to read. Everything is named, itemised and explained. At a minimum you should be able to find:

• System size in kilowatts (kW), for both the panels and the inverter
• Number of panels, with brand and exact model
• Inverter brand and model
• Any battery, with usable capacity in kilowatt-hours (kWh)
• Mounting and installation details
• The STC discount, shown as its own line
• Exclusions and possible extra costs
• Warranty details and payment terms

If you’re after a solar panels quote that you can actually rely on, it should describe the job well enough that another person could price the same job from it.

Note that no two properties are quite the same. Roof pitch and material, how far the inverter sits from your switchboard, the age of your electrical wiring and whether you want a battery now or later will all move the price. A quote that ignores these things, or doesn’t mention that a site inspection might change the number, deserves a closer look.

Check The Panel And Inverter Models

Are the panel and inverter models clearly named? They should be. “Tier 1 panels” or “premium inverter” isn’t a specification. Tier 1 is a financial-strength rating used in the industry, not a guide to how well a panel will perform on your roof.

Look for the brand, the model number and the panel wattage (for example, a 440 W panel). Then check:

• Panel count × wattage = system size. Twelve 440 W panels gives you 5.28 kW, not 6.6 kW. If the maths doesn’t add up, ask why.
• Inverter size. The inverter converts the DC power from your panels into AC power for your home. It’s normal for the panel capacity to be a little larger than the inverter rating, but the quote should say what’s being installed and why.
• Expected output. Some quotes include an estimate of how many kWh the system should produce per day or year. That figure should be labelled as an estimate and based on your location and roof orientation. Be wary of promises about bill savings with no explanation of how they were calculated.

If the quote says “or equivalent” next to the brand, you’re not being quoted for a specific product. Ask what you’ll actually get.

Look Closely At The STC Discount

STCs, or Small-scale Technology Certificates, are the Australian Government incentive that reduces the upfront cost of a solar system. In most cases, the installer or retailer claims them on your behalf and takes the value off your price.

The number of STCs depends on system size, your postcode’s solar zone and the year of installation, because the amount reduces annually until the scheme ends in 2030. So a quote should show:

• The number of STCs being claimed
• The dollar value per STC that’s been applied
• The price before and after the discount

The problem is when a quote advertises only the after-STC price and hides the rest. A smaller system with generous-looking STCs can seem cheaper than a larger one, simply because the comparison isn’t like for like. If the STC value used is unusually high, ask how it’s being calculated and who is responsible if the claim changes.

If you’re getting a battery, ask whether any government battery discount is included in the price shown, and how it’s been applied.

Check Exactly What’s Included And Excluded

This is where many quotes are different. A useful quote separates costs into groups, which makes it easier to see where the money goes:

Then read the exclusions section slowly. Common ones include switchboard upgrades, asbestos handling, tile roof replacement, extra cabling over long distances and travel charges for rural properties. None of these is unreasonable on their own, but they can add up. Ask for an estimate range if something is “extra, if required”.

Simple tip: if a cost isn’t listed as included, assume it isn’t.

Read The Warranty Terms

Warranties are a place where numbers look more impressive than they are. Ask for the details on each:

• Panel product warranty: covers manufacturing faults, often 10 to 25 years depending on the brand
• Panel performance warranty: guarantees a minimum output over time, usually around 25 years
• Inverter warranty: commonly 5 to 10 years, with some extendable
• Battery warranty: often expressed in years and in energy throughput, so check both
• Workmanship warranty: the installer’s guarantee on the installation itself

Also ask who handles a claim. If the manufacturer is overseas, is there a local support arm? If the installer closes, what happens to the workmanship warranty? For a deeper look at this side of things, see our article on solar warranty and installation quality in Brisbane.

Look At The Deposit And Payment Conditions

Payment terms tell you a lot about how a quote has been put together. A small deposit to secure a booking is common. A large payment well before any equipment is ordered or work starts is worth questioning.

Check:

• How much the deposit is, and what it covers
• When the balance is due (on installation, on completion, or after the system is connected)
• What happens to your deposit if the job is delayed or cancelled
• Whether there are fees for changes to the scope

If you’re being rushed to pay today to “lock in” a price, step back. A reasonable quote should still be valid for a sensible period.

Be Careful With Unusually Cheap Solar Deals

Searching for cheap solar deals Queensland warning signs is sensible. Low prices aren’t always a problem, since smaller systems, simple roofs and good timing can all bring costs down. The question is whether there’s a clear reason for the difference.

Common explanations include:

• Lower-spec panels or a smaller inverter than the other quote
• A smaller system than it first appears
• A bigger STC discount applied, or STC pricing that doesn’t match reality
• Extras left out of the base price
• Minimal warranty support

Any of these might be acceptable if you know about them. The risk is not finding out until the first invoice, or the first fault. A good rule: if a price is much lower than the others, ask the seller to explain exactly where the difference comes from. A straight answer is reassuring. A vague one isn’t.

These are also the issues that tend to come up in Solar quote red flags australia wide: unclear product names, hidden exclusions and pressure to decide fast.

How To Compare Solar Quotes Fairly

The easiest way to compare solar quotes is to put the key details in a simple table, side by side. Here’s what to line up:

Then:

• Compare like with like: same size, similar components, same inclusions
• Work out the cost per kW only as a rough guide, as it ignores quality and extras
• Ask each seller to fill in the gaps rather than guessing

This approach is useful for anyone working out how to compare solar quotes for the first time. It also makes follow-up questions much easier.

Questions To Ask Before Accepting A Quote

Before you sign, ask:

1. Are these the exact panel and inverter models that will be installed?
2. How many STCs are being claimed, and at what value?
3. What’s not included, and what might cost extra after the site inspection?
4. Who handles warranty claims, and how do I contact them?
5. When is each payment due, and what is it for?
6. If my switchboard or wiring needs work, how will that be priced?
7. Is the battery compatible with the inverter, and can it be added later?
8. How long is this quote valid?

Write the answers down or ask for the quote to be updated. Verbal assurances are hard to rely on later.

What Queensland Homeowners And Businesses Should Look For

Queensland has plenty of sun, but plenty of variation too. A home in Redland Bay with a tile roof and a long cable run to the switchboard is a different job from a newer Brisbane house with a simple metal roof. Properties further out towards Toowoomba may have different network connection requirements, and businesses often need three-phase power, larger systems or specific export limits.

When you’re reviewing solar quotes QLD has on offer, check that the quote reflects your property rather than being a generic template. If you’re comparing a solar quote Brisbane installers have provided, look for clear mention of network approval, meter requirements and any roof or electrical work specific to your site. Where a quote doesn’t mention these things, ask whether they’ve been considered.

Why Consider REA Solar

If you’d like a quote that spells out what’s included, REA Solar installs solar power and battery systems for homes and businesses in Redland Bay, Brisbane and surrounding areas through to Toowoomba.

What REA Solar can offer:

• Experience in solar and battery installation
• In-house installation capability where applicable
• Product and system knowledge to explain how the components fit together
• Clear communication about what’s included in a quote
• Support through the installation process
• Warranty and after-sales information relevant to your system

If you already have a quote and aren’t sure how to read it, REA Solar is happy to go through it with you, even if you’re still in the research stage.

Get A Quote You Can Understand

If you’d like to discuss your solar or battery requirements, or you have a quote you’d like explained, call REA Solar on 1300 360 047 or get in touch online.