10 Important Questions to Ask When Considering Rooftop Solar Panels

Investing in rooftop solar panels is one of the most impactful ways Australians can reduce their electricity bills, decrease reliance on the electricity grid, and lower their carbon footprint. Thanks to Australia’s sunny climate and government incentives, solar power has become an accessible and practical choice for homeowners. However, to get the most out of your investment, you must ask the right questions before installing solar panels. Below, we explore 10 essential questions to guide you through the process and maximise your returns.

1. How much electricity do you need to power your home?

Understanding your household’s energy consumption is crucial when sizing a solar PV system. Review your electricity bills to determine your average daily usage in kilowatt-hours (kWh). Most Australian households consume between 15 and 25 kWh per day.

For example, a 6.6 kW system can typically generate enough solar electricity to meet the needs of an average household, depending on location and roof orientation. If you’re planning to purchase an electric vehicle or add energy-intensive appliances, consider a larger system to future-proof your energy needs.

2. How much roof space do you need for solar panels?

The amount of roof space required depends on the size and efficiency of the solar panels you choose. A standard 6.6 kW solar PV system typically requires 30–35 square metres of roof space.

Orientation and shading also play significant roles in solar power generation. North-facing roofs generally yield the best results in Australia, while east- and west-facing roofs can still perform well with the right setup. Minimise shading from nearby trees or structures, as it can reduce the electricity generated by your system.

3. How does a solar PV system work with the electricity grid?

Most rooftop solar systems are connected to the electricity grid, allowing you to draw power when your panels aren’t generating enough energy, such as during the night. Conversely, when your system produces excess solar power, you can export it back to the grid in exchange for a feed-in tariff.

This seamless integration ensures that your household always has access to reliable electricity while reducing reliance on expensive grid power during the day.

4. What should you look for in a solar company?

Selecting a reputable solar company is essential to ensuring a smooth installation process and long-term performance. Look for companies accredited by the Clean Energy Council, as they adhere to strict safety and quality standards.

Ask your installer about their experience, the warranties they offer, and whether they provide ongoing support for maintenance. A reliable solar company will also help you understand government incentives, such as Small-Scale Technology Certificates (STCs), which can significantly reduce upfront costs.

5. How much excess solar energy can you generate?

One of the biggest advantages of installing solar panels is the potential to produce more electricity than your household consumes during the day. This excess solar energy can be exported to the electricity grid or stored in a solar battery for later use.

Feed-in tariffs vary by state and energy retailer, so it’s worth shopping around for the best deal. Generating and utilising excess solar energy effectively can maximise your savings and shorten the payback period for your system.

6. What types of solar panels and inverters should you choose?

The solar panel industry offers a range of products, each with unique features and efficiency levels:

• Standard Panels: Reliable and cost-effective, suitable for most households.
• High-Efficiency Panels: Ideal for homes with limited roof space, offering greater energy output.
• Thin-Film Panels: Lightweight and flexible but generally less efficient than crystalline panels.

Your choice of inverter is equally important, as it converts the DC electricity produced by your panels into AC electricity for household use. String inverters are cost-effective and widely used, while microinverters provide optimal performance for roofs with shading or multiple orientations.

7. Can solar batteries increase your energy independence? 

Adding a solar battery to your system allows you to store excess solar power for use at night or during cloudy periods. While the initial cost is higher, batteries can significantly reduce your reliance on the grid and help you avoid peak electricity rates.

For example, pairing a Tesla Powerwall with your solar PV system can give you greater control over your energy consumption and ensure you make the most of your system’s output. Batteries are particularly beneficial in areas prone to blackouts or for homeowners aiming to live off-grid.

8. Is solar power truly cheap in the long run?

Although the upfront cost of installing solar panels may seem significant, the long-term savings on electricity bills make it one of the most cost-effective energy solutions available. By harnessing Australia’s abundant sunshine, homeowners can enjoy cheap solar power for decades

Government incentives, such as the federal solar rebate and Small-Scale Technology Certificates, further reduce costs, making solar an affordable option for households across the country.

9. How does solar power generation reduce carbon emissions?

Rooftop solar panels help combat climate change by reducing reliance on fossil fuels. Every kilowatt-hour of solar electricity generated replaces energy that would otherwise come from polluting sources, such as coal or gas.

By investing in a solar PV system, Australian households can significantly lower their carbon footprint, contributing to a cleaner, greener future. In fact, a standard 6.6 kW system can offset several tonnes of CO2 annually, making it a powerful tool in the fight against climate change.

10. How can you maximise the efficiency of your system?

To get the most out of your household solar system, regular maintenance is essential. Dust, dirt, and debris can reduce panel efficiency, so periodic cleaning is recommended.

Additionally, ensure that your system is designed to optimise output. This includes considering factors such as roof angle, panel placement, and how direct sunlight hits the panels throughout the day. Properly maintained systems can continue generating reliable, clean energy for 25 years or more.

Conclusion

Rooftop solar panels offer Australian homeowners a sustainable way to lower electricity bills, reduce carbon emissions, and gain energy independence. By asking the right questions, you can ensure your solar PV system is tailored to your specific needs and delivers maximum benefits.

Whether you’re aiming to generate cheap solar power, store excess energy with a battery, or minimise reliance on the electricity grid, careful planning and choosing the right solar company will set you up for long-term success. With government incentives and advancements in technology, there’s never been a better time to harness the power of the sun.

Take the leap into renewable energy today, and enjoy the financial and environmental rewards of a well-designed rooftop solar system.