10 Solar Power Myths in Australia: Separating Fact From Fiction

Over the years, humans have learned to harness the sun to generate electricity, and solar is now firmly established in Australia: the country reached 4 million rooftop solar installations in November 2024, with about one in three Australian homes having rooftop solar at that time.

And yet despite its popularity, solar power is surrounded by some myths that have persisted for a long time. For instance, a lot of people believe that solar energy stops working during overcast conditions. Others believe that solar batteries can only work when there is a blackout.

As a result of such solar power myths, homeowners often end up making uninformed and wrong choices regarding their energy needs. In this post, we take a look and debunk 10 solar myths that are highly popular in Australia.

Myth 1: Solar Panels Only Work in Hot Summer Weather 

There is a misconception that solar panels only work in summer. Many people still think that solar panels produce energy through heat, but in actuality they only require sunlight. Even in winter, solar panels can still generate electricity.

Solar panels are even more efficient during cool temperatures. High heat, such as during summer, reduces the panels' efficiency. Clear winter days are likely to see more efficient energy production.

That said, it's important to consider that the days in winter are usually shorter, which is likely to reduce overall solar energy generation.

The Verdict

Solar panels will generate electricity throughout the seasons provided there is sunlight and will often be more efficient during the cooler months.

Practical Takeaway

Since solar panels can generate electricity even in winter, they are still able to offset a substantial chunk of homeowners' electricity bills.

Myth 2: Solar Panels Do Not Work On Cloudy Days

This myth goes hand in hand with the one above, and is that many Australians believe that the solar panel will stop working completely, producing zero energy during an overcast and cloudy day. This is simply not true, as solar panels only require sunlight to generate electricity.

This myth comes from the fact that a lot of people still do not understand just how solar panels work, often assuming that panels require heat or blazing sun to work.

What the Evidence Shows

Solar panels require light to generate electricity, and as long as there is light, they will continue to work. Granted, clouds will reduce the amount of light, resulting in lower energy generation, but this doesn't cause the power to go down to zero.

The Verdict

Even during times of cloud cover, solar panels can still generate significant electricity and are more efficient when there isn't excessive heat. Cloudy weather indeed will affect energy production, but it doesn't stop it.

Practical Takeaways

Solar panels will still generate electricity, albeit at a reduced output. This, however, will still go a long way towards offsetting the overall energy cost and reliance on the grid.

Myth 3: Solar Power Is Expensive

Many Australians still hesitate to adopt solar energy as they believe that it is too expensive to install. While this might have been the case a decade ago, this is not the case today.

What the Evidence Shows

Advancements in solar technology and the growing demand have improved the solar industry, which makes access to solar equipment much more available and affordable. The Australian Government's Small-scale Renewable Energy Scheme (SRES) reduces the cost of most new residential and business rooftop solar systems.

The Verdict

Solar equipment is more affordable than it was a decade ago, making it within reach of the majority of Australians.

Practical Takeaways

While you will still need an upfront investment to acquire and install solar equipment, the question isn't whether it's affordable but whether you are willing to offset the rising energy bills.

Myth 4: Solar Panels Need Constant Maintenance

Many people also believe that they'll need to do constant maintenance on solar panels once installed. This is a myth. Since there are no moving parts, solar panels are relatively low-maintenance, but periodic inspection and servicing are still recommended, along with cleaning when needed.

What the evidence shows

Solar panels are designed to withstand harsh weather elements including strong winds, dust, snow, and extreme heat.

Australian Government guidance says regular maintenance helps keep a solar system working and identify issues before they become problems. Homeowners could service a solar system about every two years, while following the system documentation or installer's recommended maintenance schedule.

The verdict

Some homeowners will need to do casual solar panel cleaning depending on where they live to clear out dust and debris. That said, rain usually washes away most of the dust

Practical takeaways

Most solar panels will require little maintenance and can continue serving you for 25–30 years, requiring periodic inspection and care.

Myth 5: Solar Panels Need Replacing After A Few Years

Another misconception is that you need to replace your solar panels every few years or so. And while the earlier technology may have required this, it is not so with modern solar power equipment.

What the evidence shows

Manufacturers will conduct rigorous testing on the durability and robustness of their products. Almost all solar panels have a 25-year performance warranty, while product warranties are often shorter, commonly 10–15 years, although some product warranties now reach 25 years or more.

The verdict

Even with a 25-year performance warranty, solar equipment will continue to function efficiently, with many systems still producing electricity decades after installation. Sure, the output may go down over the years, but this happens in a steady and predictable manner.

Practical Takeaways

Solar equipment offers a reliable way to offset rising energy bills as it will continue to produce electricity decades later.

Myth 6: A Solar System Must Have a Battery

Many Australians believe that every solar system requires a battery installation. The truth is that batteries are an optional addition, and a solar system without batteries can still generate electricity during the day and run household appliances while exporting excess power to the grid.

What the evidence shows

The most common solar setups in Australia are actually connected to the grid and don't feature battery systems. The extra power is sent to the grid, which earns the owner a feed-in tariff.

Since 1 July 2025, the Australian Government's Cheaper Home Batteries Program has supported eligible small-scale battery installations through the Small-scale Renewable Energy Scheme.

Verdict

You simply don't have to install a battery system to take advantage of solar power.

Practical Takeaway

For a lot of Australian homes, solar panels are enough to provide sufficient power. However, if your needs justify an additional battery system, such as nighttime use or backup power in case of a blackout when the system is configured for backup, then it's worth the investment.

Myth 7: Rooftop Solar Always Powers a Home During a Blackout 

What the evidence shows

Most standard grid-connected solar-only systems shut down automatically during a blackout through anti-islanding protection. This prevents solar generation from being sent to the grid while technicians may be working on it.

A battery can provide backup power during an outage only if the system is configured to do so. There are also a few islandable solar-only inverters that can provide power without a battery during a blackout, but only while the sun is shining.

Verdict

Most standard grid-connected rooftop solar will not power a home during a blackout. Backup requires a system designed and configured for islanded operation; this commonly includes a battery, although a small number of islandable solar-only inverters can supply daytime power without one.

Practical Takeaways

If your goal is blackout protection, then it's important that you discuss the requirements with your solar system installer. A battery must be configured for backup to provide power during an outage, while some islandable solar-only inverter systems can provide daytime power without a battery.

Myth 8: Solar Energy Is 100% Free and Impact-Free

Another misconception is that solar energy is completely free and impact-free. While it's true that the sun's energy is free and is clean, producing solar energy is neither free nor impact-free.

What the Evidence Shows

You will need to invest in solar equipment and installation, all of which will cost money. Ongoing operating and maintenance costs are generally low after installation, but periodic servicing and eventual component replacement may still be required.

Solar equipment also has lifecycle impacts: panels and other components eventually require replacement, and end-of-life equipment should be handled through appropriate recycling or disposal pathways.

The verdict

False! While solar energy itself is free and clean, solar equipment requires investment.

Practical Takeaways

Once you make the initial investment of acquiring solar equipment, ongoing operating and maintenance costs are generally low but are not zero, helping you cut down on energy costs. Having a battery system also means that you can store excess energy for use at night or, when the system is configured for backup, during a blackout.

Myth 9: Portable Solar Panels Work Just Like Rooftop Systems

There is a myth that portable solar panels work just like rooftop solar panels. And sure, both convert solar energy into electricity. However, rooftop panels are permanently installed, connected to the grid, and sometimes to battery systems and an inverter.

On the other hand, portable solar panels are used to charge portable power stations and run small devices.

What the evidence shows

Both portable solar panels and rooftop panels use the same solar technology but aren't the same. Portable panels have a lower power output, smaller surface area, and are best suited for lower energy needs, such as when camping, powering an RV, etc.

Rooftop solar panels can produce a much higher power output and can cater to the energy needs of an entire household.

The Verdict

While portable solar panels and rooftop panels use the same solar technology, they are not the same.

Practical Takeaways

If your needs are for mobility, such as having a power backup for camping and travel, then a portable solar panel is a good choice. On the other hand, if you want to take advantage of solar energy to use at home, then rooftop solar is ideal. 

Myth 10: A Solar Generator Provides Unlimited Off-Grid Runtime

There are a lot of people in Australia who believe that a solar generator is able to offer an unlimited amount of power. However, this is not true, as runtime will depend on factors such as energy consumption, available sun hours, and battery capacity.

What the Evidence Shows

A solar generator comprises solar panels, batteries, and an inverter. How long the solar panels generate electricity will depend on the available sun hours, noting that power generation shuts down during the nighttime. The Battery capacity, as well as your home's energy consumption, also determines how long you still have power.

The Verdict

A solar generator will not provide unlimited off-grid runtime, but it will significantly improve your energy independence.

Practical Takeaways

Find out your home's energy consumption needs and choose solar equipment that matches your needs, including the right capacity solar panels, batteries, and inverter.

Factors to Consider Before Buying Solar Equipment

If you are looking to buy the right solar equipment for your needs, there are a couple of factors you will need to consider other than just the price.

Power Load

Calculate and understand the total wattage of the equipment and appliances you need to run. This helps you prevent oversizing or undersizing the solar system.

Efficiency

The higher the efficiency of the solar system, the more electricity it can generate with the same amount of sunlight. Aim for efficiency levels of between 15 and 22%.

Type

You have a choice between off-grid, on-grid, or hybrid systems. The on-grid system will typically be connected to the grid, while the off-grid type will require battery installation.

Temperature coefficient

A lower temperature coefficient means that the solar panels will continue to generate sufficient electricity even while the harsh Australian heat continues to rise.;

Certifications

Check that your system and installation comply with the standards that apply to each part of the installation: AS/NZS 5033:2021 covers installation and safety requirements for PV arrays; AS/NZS 4777.1:2024 covers installation of grid-connected inverter energy systems; AS/NZS 4777.2:2020, with current amendments, covers inverter requirements; and AS/NZS 5139:2019, with current amendments, covers safety of battery-system installations used with power conversion equipment.

Warranty

Many solar panels have a 25-year performance warranty, while product warranty periods can be shorter; check both warranty types before buying.

A Compact Example with Elite 100 V2 and a 200W Portable Solar Panel

Let's consider the BLUETTI Elite 100 V2 connected to a 200W solar panel, for example. It features a 1024Wh battery capacity and offers an 1800 W AC output.

This makes it well capable of running essential household devices such as televisions, fridges, routers, laptops, smartphones, and lighting.

It can therefore help cut down on power costs or provide backup when there is a blackout.

And the 200W solar panels mean that you can recharge the Elite 100 V2 using the sun's energy and won't have to rely on the grid to recharge the portable power station. That said, how practical this unit is for a household boils down to the home's energy consumption levels.

Households that consume more energy than the unit can provide will need a larger battery pack. And this is exactly what we said before: before you get yourself a solar system, calculate your home's power consumption and needs and then match this to the size of the unit.

Conclusion

When it comes to solar energy, it is never a one-size-fits-all. Different households have different energy requirements and usage. The myths around solar energy only work to create confusion when it comes to the energy production, costs, and performance of the solar units.

Rather than basing their choices on myths, homeowners are better off using site-specific calculations, including considering the weather patterns, amount of daylight, and their overall energy requirements, to make better, more accurate choices.