Is Solar Worth It in Australia in 2026?

The question changed, so the answer changed

For most of the last decade, "is solar worth it?" was really a question about feed-in tariffs. Households installed panels, exported the surplus, and were paid a generous rate per kilowatt-hour for everything they sent to the grid. In that world, a bigger system was almost always better, and being out of the house during the day barely mattered — you got paid either way.

That world is gone. So much rooftop solar now floods the grid at the same midday hours that wholesale daytime electricity prices regularly fall to near zero, and sometimes negative. Because retailers fund feed-in tariffs out of that wholesale value, the rates collapsed with it. Victoria removed its mandated minimum feed-in tariff on 1 July 2025, leaving a floor of zero and an average minimum near a single cent. South Australia never mandated one and now applies "solar sponge" pricing that can even charge you for exporting in the middle of the day. The export cheque, in other words, is no longer the point.

The result is that the 2026 question is no longer "what will the grid pay me?" but "how much of my own solar can I use myself?" That single shift — from export-dominant to self-consumption-dominant returns — explains almost everything counter-intuitive about solar economics today.

Self-consumption is now the whole game

Here is the arithmetic that matters. When you self-consume a kilowatt-hour (kWh) of solar, you avoid buying that same energy from your retailer at the full retail price — somewhere between 27 and 34 cents in 2026, depending on your state. When you export it instead, you might earn three to eight cents. So a self-consumed unit is worth roughly four to ten times more than an exported one.

That ratio is why daytime usage has become the most powerful lever in the whole calculation. A household that runs the dishwasher, washing machine, pool pump and hot-water system during daylight — or simply has someone home — might self-consume 50 to 70 percent of its generation. A house that sits empty until 6pm might self-consume only 20 to 30 percent. Lifting self-consumption from 30 to 60 percent can cut a year or more off payback without spending a single extra dollar on hardware. It is the cheapest upgrade available, and it is free.

This also reframes the old "bigger is always better" advice. Panels are genuinely cheap in 2026 — roughly 88 cents to $1.05 per watt fully installed — and the federal rebate scales with size, so a larger array costs little per kilowatt. But the extra generation only pays back quickly if you can actually use it. Oversize the system and then export the surplus for a few cents, and the marginal panels take far longer to earn their keep. Oversize it and pair it with daytime loads or a battery, and the maths works.

How to decide if solar is worth it for your home

The verdict is personal, but the method is the same for everyone. Work through these four steps to size up your own payback before you ask for a quote.

1. Estimate your daytime self-use share. Be honest about how much power you can use while the sun is up. Someone home during the day, or shiftable loads like a pool pump and hot-water timer, pushes self-use to 50–70%; an empty house sits at 20–30%. This single number moves your payback more than anything else.
2. Check your retail price and feed-in tariff. Find your retail rate (about 27–34 c/kWh in 2026) and your feed-in tariff (FiT, about 3–8 c/kWh). The gap between them is what each self-consumed unit is worth.
3. Size the system to your usage and the rebate. Match system size to your daytime load. Panels are cheap and the federal STC rebate scales with size, so a 6.6 kW system is a common starting point in most capitals.
4. Model your payback. Enter your state, power price, system size and realistic self-use into the solar payback calculator to see your payback, annual savings, return and 20-year net.

What is the STC solar rebate and how does it work?

The federal Small-scale Renewable Energy Scheme (SRES) still discounts every eligible installation through small-scale technology certificates (STCs), which your installer claims on your behalf as an upfront price cut. For a 6.6 kW system in a mainland capital that is worth roughly $1,800 off the sticker price in 2026. The catch is the deeming period — the number of future years of generation the scheme credits you for — which is five years for a system installed in 2026 and drops by one year every 1 January until the scheme ends on 31 December 2030. A system bought a year later receives a smaller rebate. If you have already decided to install, waiting only costs you money.

Which Australian state has the fastest solar payback in 2026?

Because self-consumption against retail prices now drives the return, the states with the highest power prices or the most sun finish fastest. The table below shows indicative payback for a typical 6.6 kW system at 60 percent self-consumption. Open a state page for the local rebates, feed-in detail and a calculator pre-set to that state.

The spread is telling. The hardware is identical in every state — the difference is entirely local: tariffs, sunlight and rebates. South Australia and Victoria sit at opposite ends of the same story, which is why they are the clearest illustration of the 2026 shift: SA's punishing retail prices make self-consumption pay back in under three years, while Victoria's combination of a near-zero feed-in tariff, the lowest mainland yield and lower retail prices pushes the same system past four. Neither is "bad" — they simply reward different behaviour. A Melbourne household that self-consumes heavily still does well.

Is a home battery worth it for solar in 2026?

If the whole game is self-consumption, a battery is the obvious next move — and from 1 May 2026 the federal Cheaper Home Batteries program cuts roughly $252 per usable kilowatt-hour off the price, at the full rate for the first 14 kWh. A battery lets you store cheap daytime solar and spend it in the evening peak instead of exporting it for a few cents and buying it back at full price. That arbitrage is real and it tightens your bills.

But honesty matters here: battery hardware still costs around $1,000 per usable kilowatt-hour even after the rebate, so a battery usually lengthens overall payback compared with panels alone. Most people who add one do so for evening bill coverage, blackout resilience and price certainty as much as for the fastest possible return. If your priority is the quickest payback, panels sized to your daytime usage win; if it is independence and a steadier bill, a battery earns its place. Our guide to the federal battery rebate walks through exactly how the discount tapers and when a battery improves your numbers versus stretches them.

Key solar terms, defined

Solar payback period

The time it takes for the savings from a solar system to equal its net cost after rebates. Below about five years is considered fast in 2026.

Self-consumption

The share of the power your panels generate that you use yourself rather than export. The single biggest lever on payback, because self-used energy is worth the full retail price you avoid.

Feed-in tariff (FiT)

The rate your retailer pays for surplus solar you export to the grid — about 3–8 c/kWh in 2026, far below the retail price you pay to buy power back.

STC rebate

The upfront discount from the federal Small-scale Renewable Energy Scheme, paid as small-scale technology certificates your installer claims for you.

Deeming period

The number of future generation years the STC scheme credits at install time. It shrinks by one year every 1 January until the scheme ends in 2030, so the rebate falls over time.

The verdict for 2026

So, is solar still worth it? For the typical owner-occupier with a roof that gets sun and at least moderate daytime electricity use, the answer is a confident yes — payback of three to five years on a system that lasts 20-plus years is a return that few other home investments match, and it improves your bill from the first quarter. The people for whom the case is weaker are renters, those planning to move within a couple of years, and households that are genuinely empty all day with no way to shift load into daylight. Even there, a battery or simple appliance timing can usually tilt the balance back.

The most important takeaway is that your number is personal. National averages hide a payback range from under three years to over four, driven by your state, your daytime habits, your install price and your system size. Rather than trust a headline, model your own: open the solar payback calculator and enter your state, your power price, your system size and your realistic daytime self-use to see how fast solar pays back for your home — and what it returns over 20 years.

Data last verified: 2026-06-27   Estimate only — not financial advice. Figures are indicative and depend on your retailer, usage pattern and final install quote. Sources: Clean Energy Regulator (STC scheme), SolarChoice Price Index (June 2026), Canstar (electricity prices), Essential Services Commission and IPART (feed-in benchmarks), DCCEEW (Cheaper Home Batteries Program).

See your own payback

The fastest way to answer the question for your home is to run the numbers. The calculator is free, takes about a minute, and shows your payback, annual savings, return and 20-year net. You can also jump straight to your state: NSW, QLD, VIC, SA or WA.

Open the solar payback calculator →