The short answer: it depends where you live
Solar system prices vary enormously between countries and regions, so there is no single number that works as a global answer. Our cost comparison by country page shows indicative pricing for published markets — start there for a ballpark in your area.
What matters more than the headline number is understanding what goes into it. Think of it like going out to dinner: there are a lot of restaurants competing for your business on price, and when you pay very little, you generally get poor quality food. You might get a reasonable meal, but it probably won’t leave you feeling great. It is the same with solar. If you buy a cheap system, you are far more likely to have a headache later on, because in order to install cheap systems, the company has to cut corners somewhere — either on components or on the installation itself.
On the other hand, it’s also possible to overpay. Unlike dinner, most people only buy solar once, so unless you do your research you may have no idea what a system should cost. Some companies take advantage of that. The rest of this chapter gives you the knowledge to tell a fair quote from a bad one.
System size
Size is the biggest single driver of price. A larger system uses more panels, more racking, more wiring, and often a bigger inverter. Doubling the system size doesn’t quite double the price (because some costs like the inverter and installation labour don’t scale linearly), but it’s close.
See our chapter on what size system you need if you haven’t sized your system yet.
Equipment quality
The panels and inverter are the two main equipment costs. Within each, there’s a range from budget to premium:
- Budget equipment — lower-tier brands, shorter warranties, adequate performance. These systems work, but you’re trading longevity and support for a lower upfront price.
- Mid-range — established manufacturers with solid warranties and local support. This is where most residential systems should land. You get good equipment, backed by companies that will likely still be around when you need them.
- Premium — top-tier brands with the longest warranties, highest efficiency, and best temperature performance. The price premium is real but the performance gap over mid-range is modest. Worth it if you have limited roof space or want the longest possible equipment life.
The difference between budget and premium for the same system size can be 30–50% of the total price. Most of the value sits in mid-range — see our chapter on choosing panels and inverters for what to look for.
Installation complexity
Not every roof is the same. Factors that increase installation cost:
- Roof type — tile roofs are generally more time-consuming to work on than metal roofs. Flat roofs need tilt frames.
- Roof height and access — multi-storey homes, steep pitches, or difficult access add labour time and safety equipment.
- Multiple roof planes — splitting the array across several orientations adds wiring and mounting complexity.
- Switchboard upgrades — older switchboards may need to be upgraded to meet current safety standards before solar can be connected. This can add a few hundred dollars to the job.
- Distance from the roof to the switchboard — longer cable runs add material cost.
A good installer will flag these in their quote. If a quote doesn’t mention any site-specific factors, that’s a reason to ask — or a red flag that they haven’t looked closely enough.
Batteries
Adding a battery is the single biggest cost addition. A typical home battery (10–15 kWh) roughly doubles the total system price. Batteries are optional and can be retrofitted later — many homeowners install solar first and add a battery in a few years when prices drop or their needs change.
Whether a battery makes financial sense depends on your electricity rates, feed-in tariff, and usage pattern. Our savings calculator models this for your country.
Local market factors
Solar pricing varies by country and region for reasons that have nothing to do with the equipment:
- Labour costs — installation is manual work, and labour rates vary significantly between markets.
- Rebates and incentives — government programs can reduce the effective price by 20–40% in some markets (e.g. Australia’s STC scheme, the US federal tax credit). These change frequently.
- Import duties and taxes — VAT, GST, or import tariffs on equipment vary by country and can shift the sticker price significantly.
- Competition — markets with many active solar installers tend to have lower prices than markets where solar is still niche.
Our cost comparison by country page shows indicative pricing across published markets. For a full breakdown of what’s available where you live, see our rebates & tariffs page. And to understand how feed-in tariffs and solar export affect your payback, see feed-in tariffs & solar export explained.
What is a fair price?
You don’t need to know the exact right price — you just need enough context to spot the outliers. The best way to do that is to get at least three quotes and compare them side by side, itemised (see our chapter on choosing an installer).
If one quote is dramatically cheaper than the others, find out why. It’s almost always lower-quality equipment, a less experienced installer, or a company cutting margins to win volume — and those margins come out of your system quality somewhere. Equally, if one quote is dramatically more expensive, ask them to justify it. Sometimes there’s a good reason (premium equipment, complex roof); sometimes there isn’t.
For most homeowners, a mid-range system from a reputable local installer is the sweet spot. You get solid equipment backed by real warranties, installed by people who have a reputation to protect. Think long term: a solar system lasts 25+ years, and the cheapest system almost never turns out to be the best value over that period.