Solar questions, answered straight

Yes, for most owner-occupied homes with a reasonably unshaded roof. Melbourne gets less sun than Brisbane, but panels still generate strongly from spring to autumn, and electricity prices in Victoria are high enough that most households recoup the cost in roughly 4 to 7 years. After that the system generates savings for the rest of its 25-year life.

The honest exceptions: heavily shaded roofs, homes you plan to sell within a couple of years, renters, and households that use almost no power during the day and cannot shift any usage. In those cases, wait or fix the underlying issue first.

For most Melbourne family homes the answer is 6.6kW or larger. Panel prices have fallen so far that the extra panels cost little compared to the fixed costs of the installation, so undersizing rarely saves money in the long run.

Go larger (10kW or more) if you have a big daytime load, plan to buy an electric vehicle, want to run heating or cooling from solar, or intend to add a battery later. The practical limits are your roof space and what your electricity distributor allows you to export. A good installer checks both before quoting; be wary of anyone who quotes a size without asking about your usage.

The installation itself is usually one day, sometimes two for larger or more complex roofs. The full journey is longer: getting quotes and choosing an installer typically takes a couple of weeks, rebate and grid connection approvals add more, and installer wait lists vary with demand. From first quote to switched-on system, 4 to 10 weeks is normal in Melbourne.

One step catches people out: after installation, your electricity retailer needs to reconfigure your meter before you earn feed-in credits. Chase this if it drags past a couple of weeks.

Very little, which is part of the appeal. Melbourne rain keeps panels reasonably clean on most roof pitches; a professional clean is only worth it if output visibly drops or your roof collects unusual grime. Beyond that, glance at your inverter's app monthly so you notice a fault early, and consider an electrician's inspection every few years for cabling and connections.

The main thing to actually watch is generation. A system that quietly stops producing can go unnoticed for months on a home with high usage. Set up the monitoring app on day one and check it while the workmanship warranty is fresh.

As of August 2026, a standard 6.6kW system typically costs between $4,000 and $9,000 installed in Melbourne after the federal STC discount, with most decent-quality systems landing between $5,000 and $7,500. Larger 10kW systems run roughly $7,000 to $14,000.

The spread is mostly hardware quality and installer overheads. The cheapest quote and the best-value quote are rarely the same one: what matters is the panel and inverter models, the warranties, and whether the installer will still exist in year eight. See our cost guide for the full breakdown. Figures last checked 29 August 2026.

Two layers stack together. The Victorian Solar Homes rebate gives eligible owner-occupiers up to $1,400 off a solar panel installation, plus an optional interest-free loan of the same amount. From 1 July 2026 the household income cap tightened from $210,000 to $150,000 per year, so check your eligibility before counting on it.

Separately, the federal STC incentive discounts every eligible installation at the point of sale, worth roughly $2,000 to $3,000 on a 6.6kW system in Melbourne. Nearly all advertised prices already include the STC discount, so ask for itemised quotes showing prices before and after each rebate. Figures last checked 29 August 2026.

Most Melbourne households land between 4 and 7 years. The biggest lever is not the purchase price but self-consumption: feed-in tariffs now pay only a few cents per kilowatt-hour for power you export, while power you use directly saves you the full retail rate.

Practical translation: run the dishwasher, washing machine and hot water during daylight and your payback shortens more than shaving a few hundred dollars off the quote ever would. A household that exports almost everything it generates can see payback stretch well past 7 years.

A feed-in tariff is what your electricity retailer pays you for solar power you export to the grid. In Victoria it is now only a few cents per kilowatt-hour, a fraction of what you pay to buy power, because so much solar already floods the grid in the middle of the day.

This is not a reason to skip solar; it is a reason to design around self-use. Size the system for your actual consumption, shift usage into daylight hours, and treat exports as a small bonus rather than the business case. It is also the main economic argument people weigh when considering a battery.

Six checks cover most of it: a Clean Energy Council accredited installer doing the actual work, a Google rating of 4.5 or better across a meaningful number of recent reviews, an itemised quote naming the exact panel and inverter models, three warranties in writing (panels, inverter, and the installer's own workmanship), a physical local presence, and no pressure to sign today.

Get at least three quotes so you can see what the market really charges for your roof. Our directory ranks Melbourne installers by Google rating so you can build that shortlist quickly, and our choosing guide covers the red flags in detail.

Something is different, and it is rarely something good. The usual suspects: budget panels or an unproven inverter brand, the sale made by a marketing company that subcontracts the installation to whoever is cheapest that week, corners cut on mounting and cabling you cannot see from the ground, or a business structured to disappear before warranty claims arrive.

A low price is not automatically a scam, but make the installer explain exactly what makes it cheaper, in writing. If the answer is vague, pay more elsewhere. The workmanship warranty is only worth something if the company still exists to honour it.

The inverter matters most. It works hardest, fails first, and a dead inverter means a dead system. Choosing a well-proven inverter brand over the cheapest option typically costs $500 to $1,500 more and is usually worth it.

Panels are more commoditised: mid-tier panels from established manufacturers hit the value sweet spot for most homes. What matters more than the badge is that the manufacturer has an Australian office to honour warranties, and that your installer actually carries the brand. Our brand rankings show which panel, inverter and battery brands Melbourne installers mention on their own websites, so you can see what is actually being installed locally.

Batteries have become much better value since the federal Cheaper Home Batteries Program began in July 2025: it discounts installations by roughly 30%, currently around $250 per usable kilowatt-hour on the first 14kWh, taking a typical 10kWh battery from about $12,000 to the high $8,000s installed.

They make the most sense if your evening usage is heavy, you are on a time-of-use tariff, or blackout backup matters to you. On pure payback they are still slower than panels, so if the budget forces a choice: panels first, battery later. The system just needs a battery-ready inverter or space for one. Figures last checked 29 August 2026.

Match the battery to your evening and overnight consumption, not to the biggest number the salesperson offers. For most Melbourne homes that lands between 10 and 15kWh: enough to cover the evening peak and morning routine without paying for capacity that sits unused.

Check your electricity bills for daily usage, subtract what you use during daylight, and that gap is roughly what the battery should cover. Note the federal discount applies at full rate on the first 14kWh of usable capacity, so very large batteries earn proportionally less rebate. An installer who asks for your usage data before recommending a size is a good sign; one who quotes a size in the first phone call is not.