How to Choose the Right Solar Panels for Your Home

You'll often see panels described as "monocrystalline" or "polycrystalline." Here's the quick version: monocrystalline panels are made from a single silicon crystal, while polycrystalline panels are made from multiple crystals melted together.

In practice, monocrystalline panels are more efficient (they convert more sunlight into electricity) and perform slightly better in low-light conditions. They're also typically black in colour, which many homeowners prefer aesthetically.

Polycrystalline panels are usually blue-ish and slightly less efficient, but they used to be cheaper. The key word there is "used to be."

Here's the thing: in 2026, the price difference has essentially disappeared. Manufacturing improvements mean monocrystalline panels are now just as affordable as poly, with better performance. As a result, almost every quality panel on the Australian market today is monocrystalline.

If an installer quotes you polycrystalline panels, ask why. There might be a legitimate reason, but in most cases, you should be getting mono.

Panel efficiency is the percentage of sunlight that gets converted into electricity. A 22% efficient panel converts 22% of the light hitting it into usable power.

Premium panels from brands like SunPower and REC sit around 22-23% efficiency. Mid-range panels from Jinko, Trina, and Canadian Solar typically hit 20-21%. Budget panels might be 18-19%.

Here's where people get confused: higher efficiency doesn't necessarily mean better value.

Efficiency matters most when you have limited roof space. If you can only fit 10 panels, then yes, getting the most efficient panels makes sense because you need to maximise every square metre.

But if you've got plenty of roof space? A 21% efficient system and a 19% efficient system will produce roughly the same amount of power - you'll just need a couple more panels with the less efficient option. And those extra panels often cost less than the premium for high-efficiency models.

Every solar panel comes with two types of warranties, and they cover very different things.

Product warranty (also called manufacturing warranty) covers defects in materials and workmanship. If your panel cracks, delaminates, or fails due to a manufacturing issue, this warranty covers replacement. Most quality panels offer 12-15 years, with premium brands offering 25 years.

Performance warranty guarantees the panel will still produce a certain percentage of its rated output after a set number of years. Standard is 80-84% output after 25 years. Some premium panels guarantee 92% output after 25 years.

Here's what many people miss: a warranty is only as good as the company backing it.

A 25-year warranty from a manufacturer that might not exist in 5 years is worthless. A 15-year warranty from a company with a strong Australian presence, local stock, and a track record of honouring claims is far more valuable.

You'll hear salespeople throw around "Tier 1 panels" like it's a quality certification. It's not.

The Tier 1 classification comes from Bloomberg New Energy Finance (BNEF) and it measures one thing: bankability. Essentially, it asks whether banks and financiers are willing to fund large-scale solar projects using panels from that manufacturer.

Being Tier 1 means the company is financially stable, has been around for a while, and produces panels at scale. It's a decent indicator of reliability, but it doesn't directly measure panel quality or performance.

A Tier 1 manufacturer can still make budget panels alongside their premium range. And some excellent smaller manufacturers might not meet the bankability criteria simply because they don't operate at massive scale.

Bottom line: Tier 1 is a good baseline filter, but don't use it as your only criteria. A Tier 1 panel from a company with poor Australian support is still a risky choice.

Getting three quotes is standard advice. But if you don't know what to compare, you're just looking at different numbers without context.

Here's what actually matters when you're comparing solar quotes:

The solar industry in Australia is mostly full of good operators, but there are still some practices to watch out for.

At the end of the day, the "best" solar panel is the one that fits your specific situation: your budget, your roof space, your energy needs, and your risk tolerance.

For most Australian homes, a mid-range system from a reputable brand with strong local support will deliver excellent results. You don't need the most expensive panels on the market, but going for the absolute cheapest option is rarely worth the long-term risk.

Focus on the total package: quality panels, a reliable inverter, professional installation, and an installer who'll be around to support you for years to come.

Get that combination right, and you'll enjoy decades of clean, cheap electricity. Get it wrong, and you'll be dealing with headaches long after the salesperson has moved on.

Not sure where to start? Take our rebate eligibility quiz to see what incentives you qualify for, then get matched with vetted local installers who can give you proper quotes.