How much can I save on electricity bills with solar panels in Queensland?

In Queensland, households can greatly reduce their electricity costs by installing solar panels, with savings depending on factors such as energy usage, system size, and feed-in tariffs. Because every home is unique, we design bespoke solar systems tailored specifically to your property and energy needs — ensuring you achieve the best results and long-term value.  

What government rebates or incentives are available for solar panels and batteries in 2025?

Queensland homeowners can access the federal Small-scale Renewable Energy Scheme (STCs) for solar panels, which reduces upfront costs. For batteries, the new Cheaper Home Batteries Program offers around a 30% discount on approved systems, applied directly at the point of sale by accredited installers.

How do I know what size solar system my home or business needs?

The right system size depends on your electricity usage, available roof or land space, and future energy goals — such as adding an EV or battery storage. These days, most households choose systems of 13 kW or larger to maximise savings and future-proof their energy needs. We provide a tailored assessment to ensure your solar system is the perfect fit for your home and lifestyle.  

What’s the difference between rooftop solar and ground-mounted solar panels?

Rooftop solar is most common, but ground-mounted systems are ideal for properties with large open spaces or unsuitable roofs. Ground mounts often achieve higher efficiency due to optimal tilt and orientation and can generate up to 30% more energy with tracking systems.

Are solar batteries worth it, and how long do they last?

Yes, solar batteries are increasingly valuable for reducing grid reliance, lowering evening electricity costs, and providing blackout protection. Most quality batteries last 10–15 years with warranties covering at least 6,000 charge cycles.

How long does a solar panel installation take from start to finish?

At Black Diamond Solar, we know that time is literally money when it comes to paying power bills. That’s why we strive to have every system installed and operational within just 7 days of approval. Most residential installations take only a day or two, ensuring you start saving sooner. Larger commercial projects may take a little longer, depending on their size and complexity.

Do solar panels work during cloudy days or at night?

Solar panels still generate electricity on cloudy days, though output is reduced by 10–25%. At night, panels don’t produce power, but homes with batteries can use stored solar energy instead of relying on the grid.

What maintenance is required for solar panels and batteries?

Solar panels require minimal maintenance — typically just a professional clean and inspection every 12 months to keep them performing at their best. Batteries are also low-maintenance but should be monitored for software updates and performance checks. For added peace of mind, we offer ongoing maintenance packages to ensure your system continues to run efficiently year after year.

How long is the warranty on solar panels, inverters, and batteries?

Most solar panels come with a 25-year performance warranty and a 10–15 year product warranty. Inverters typically include a 10-year warranty, while batteries range between 10–15 years, depending on the manufacturer. However, at Black Diamond Solar, we go above and beyond — offering an industry-leading 30-year warranty and exclusive warranty options that no other solar company provides, giving you unmatched confidence and long-term protection.

Can I add a solar battery to my existing solar panel system?

Yes, in most cases you can retrofit a solar battery to your current system. This can be done with a compatible hybrid inverter or by adding a separate battery inverter. Our team can assess your system and recommend the best upgrade option.