Solar Panels in Australia: Rebates, Costs and Payback

Solar in Australia in 2026 is a strong financial decision for households that use power during the day, and a mediocre one for households that don't. The federal rebate reduces every year, so delay has a measurable cost. State schemes matter but change constantly, feed-in tariffs are a bonus rather

Size up rather than down, get three identical quotes, verify accreditation and licence numbers yourself, and plan to shift your heavy appliances into the daylight. Do those four things and the payback calculation looks after itself.

Comparing accredited installers, electricians and energy-efficiency trades in your own postcode? Browse verified operators in our Australian local services and trade listings and check reviews before anyone climbs on your roof.

Three numbers decide whether solar works for you.

Your daytime usage. Solar earns its keep by powering appliances while the sun is up. A household running air conditioning, a pool pump or a home office on a weekday afternoon will save far more than a household that's empty until 6pm and then cooks, washes and watches television after dark.

Your electricity rate. If you're paying 30–40c per kilowatt hour, self-consumed solar is worth 30–40c per kWh saved. If you're on a cheap overnight-heavy plan, the value of the same solar output drops.

Your feed-in tariff. What your retailer pays for exported power has fallen substantially across Australia over the past decade. This is the number that quietly breaks people's payback calculations, and we'll come back to it.

If your electricity rate is high and your daytime usage is heavy, solar is one of the better returns available to a household in 2026. If you're never home during the day, the numbers get much tighter — and a battery, not more panels, is the thing to price.

How the federal rebate works (and why it shrinks)

The federal incentive is delivered through the Small-scale Renewable Energy Scheme, which issues small-scale technology certificates — STCs — for eligible rooftop systems. You don't claim them, apply for them or wait for them. Your installer applies the value as a point-of-sale discount, and the certificates are then surrendered to the Clean Energy Regulator.

Two factors determine how much you get:

System size. Certificates are issued per kilowatt of capacity, so a bigger system attracts more — up to the cap for the scheme.

Remaining deeming period. Each certificate represents a notional amount of renewable generation between installation and 2030, when the scheme is legislated to end. So the number of years left in the scheme shrinks each 1 January, and the rebate value shrinks with it.

That's the whole mechanism, and it creates a simple rule: the incentive is worth more this year than next year, and more next year than the year after. Quotes are typically valid for a short period, and the discount is locked when the system is installed and the certificates are created.

What solar actually costs installed in 2026

Indicative installed prices for standard grid-connected rooftop systems in metro Australia, after the federal discount and before any state rebate. Roof type, access, tilt, storey height and whether switchboard work is needed all shift the number.

System size	Typical installed cost (after federal rebate)	Good fit for
6.6 kW	$4,200 – $7,500	2–3 person household, modest daytime use
10 kW	$7,000 – $12,500	Family home with air conditioning or a pool
13.2 kW	$9,500 – $16,000	Larger home, heavy daytime load, EV charging
20 kW	$15,000 – $26,000	Big household, home business, large roof decks
Add battery (10 kWh)	$10,000 – $17,000	Evening-heavy usage, weak grid, backup needs

Three notes that stop these numbers misleading you.

The spread is quality, not just margin. Panels differ in degradation rate and warranty length; inverters differ enormously in reliability and service support. The gap between the cheapest and best quote of the same size is usually the gap between an inverter brand with no local service network and one with a five-day warranty response.

Cheap quotes usually omit something. Common omissions: switchboard upgrade ($500–$1,500), meter reconfiguration by the network ($100–$500), roof safety work, tilt frames, and removal of the old system. Ask for a quote that lists what's not included — the honest installers answer easily.

Per-kilowatt cost falls as size increases, so quoting the smallest system you think you need is usually a mistake. If your switchboard and roof allow it, sizing up is usually cheaper per watt than upgrading later.

State schemes: what's still on the table

Federal incentives now do the heavy lifting, but state programs still move the total meaningfully, and they change often — most are capped, means-tested or era-limited. Check the current status of yours before you plan around it.

Victoria has run household solar and battery programs with income-tested interest-free loans and rebates, plus a separate battery incentive. Program terms have changed repeatedly, and some streams close when the allocation is spent.
New South Wales has run interest-free loans and time-limited rebate programs for solar and batteries, often tied to a completed energy assessment or a switch to an approved retailer offer.
Queensland has offered battery and loan programs for households and small business, with eligibility tied to location and existing system status.
South Australia has targeted rebates and low-income programs, alongside some of the country's highest historic solar penetration.
Western Australia operates a different grid economics picture, with a state-owned network and specific export limitations, plus rebate programs that have shifted between budget cycles.
ACT, Tasmania and the Northern Territory run smaller, more targeted programs, sometimes focused on low-income households, rentals or bushfire-resilient power.

Ignore any list of rebates older than about six months, including this one. Confirm on your state energy department or regulator's website on the day you sign.

Feed-in tariffs: the bit everyone gets wrong

A feed-in tariff is what your retailer pays for each kWh you export. In most of Australia in 2026 it sits in a low single-digit to low double-digit cents-per-kWh range, and some plans offer different rates for different times of day.

Here's the mistake: people choose a plan with the highest headline feed-in tariff and lose money overall, because the same plan charges more per kWh for everything they consume.

The correct comparison is not the feed-in rate. It's this:

Self-consumed kilowatt hours × your usage rate — that's your genuine savings, and it dominates.
Exported kilowatt hours × feed-in rate — that's your bonus.

Shift your thinking accordingly. Adding a fourth panel to export more power at 5c does very little. Running the dishwasher, pool pump and washing machine between 10am and 3pm instead of 7pm does a great deal — and it costs nothing.

For a proper side-by-side of what's available to you, use the government's free comparators: Energy Made Easy for most states, and Victorian Energy Compare for Victoria. Both also flag concessions you may not know you qualify for.

Batteries: worth it yet?

The honest answer in 2026 is "sometimes, and it depends on the shape of your evening".

A battery improves the economics of solar when:

You use a lot of power between 5pm and 10pm
Your feed-in tariff is low or falling
You're on a time-of-use plan with a high evening peak rate
You lose power often, or you need backup for medical equipment
You're adding solar anyway and a hybrid-ready inverter avoids a later replacement

It improves economics less when you're home all day (self-consumption is already high), when your network's export limits are generous and your feed-in rate is still decent, or when you'd need to borrow at a high rate to afford it.

Treat a battery as two purchases: an energy purchase and a resilience purchase. Payback on the energy component alone is longer than most salespeople imply, and shorter when you price in blackout protection you were going to solve another way — a generator, or nothing.

Choosing an installer without getting burned

Solar's failure mode isn't usually the panels. It's the company.

Check accreditation. Installers and designers are accredited through the Clean Energy Council's approved installer program — it's required for your system to receive the federal certificates. Verify the accreditation number, not just the logo.

Check the electrical licence separately. In most states the electrical work is signed off by a licensed electrician, and you should receive a certificate of electrical safety. That certificate matters at sale, at insurance time, and if anything goes wrong.

Ask who answers the phone in year three. The most common bad outcome in Australian solar is a system with a failed inverter and an installer that no longer exists. Ask for the manufacturer warranty process in writing, and check whether the inverter brand has an Australian service presence.

Look for a physical business address in your state, an ABN you can verify, and reviews that mention after-sales service rather than installation day.

Get three quotes on identical specifications. Same panel model, same inverter model, same size, same roof area. Then compare on total price and warranty terms. Quotes compared on "6.6 kW" alone are meaningless.

You can start by comparing installers and other licensed trades in your area through our business listings, or browse local providers in Brisbane, Perth and Adelaide.

A worked payback example

A Brisbane household paying 32c per kWh, using 40% of a 10 kW system's output during the day, exporting the rest at 6c:

Annual generation: roughly 14,000 kWh for a well-oriented 10 kW system
Self-consumed: ~5,600 kWh × $0.32 = $1,790 saved
Exported: ~8,400 kWh × $0.06 = $504 earned
Total annual benefit: ~$2,294
Installed cost after federal rebate: $9,500
Simple payback: roughly 4.1 years

Now change one assumption. The same household shifts its pool pump and dishwasher to daytime and starts charging an EV at home, lifting self-consumption to 65%:

Self-consumed: ~9,100 kWh × $0.32 = $2,912 saved
Exported: ~4,900 kWh × $0.06 = $294 earned
Total annual benefit: ~$3,206
Payback drops to roughly 3 years

Same panels, same price, same suburb. The only difference is behaviour. That's why the most valuable thing you can do after installing solar is the least technical: change when you use power.