If you’ve installed solar panels or are thinking about it, you’ve probably heard about solar batteries.

They can help you store the energy your panels generate during the day so you can use it at night or during a blackout. But are they really worth it for your home in Queensland? 

Let’s break down the key questions about solar batteries.

Do I need a solar battery, and how do I know if it’s worth it?

A solar battery isn’t essential, but it can make a massive impact depending on your energy use. If you use most of your electricity at night or want backup power during outages a battery will help.

Consider your electricity costs: if your home uses a lot of energy outside of solar production hours and your electricity provider charges high rates, a battery can save you money over time.

What size battery do I need?

Battery size is measured in kilowatt-hours (kWh). The right size depends on your home’s electricity use and whether you want full backup power or just partial coverage. For a typical Queensland home:

• Small battery 0-15kwh
• Medium battery 15-25kwh
• Larger battery 25+kwh

We can help calculate the right size based on your energy usage and roof system.

Can I add a battery to my existing system?

Yes! Many Queensland homes add batteries to existing solar systems. If your inverter supports a battery (some older systems may need an upgrade), you can usually retrofit a battery without replacing your panels. This is a popular option for homeowners who installed solar before battery prices dropped or before rebates were available.

How long do solar batteries last?

Most modern batteries last 10–15 years although different brands have different cycle ratings. eg Sigenergy is 10,000 cycles which is 25+ years with proper use. 

Battery maintenance is minimal, but it’s important to follow your installer’s recommendations to prolong battery life.

What happens if the battery runs out overnight?

If your battery runs out, your home simply draws electricity from the grid, just like a normal solar setup. You won’t lose power, but you won’t be using stored solar energy until the panels generate more during the day. This is why battery size and energy habits are important when choosing a system.

Conclusion:
Solar batteries can offer peace of mind, backup power, and potential savings, but whether they’re right for you depends on your energy needs, home setup, and budget. If you’re in Queensland and thinking about adding a battery to your existing solar system, a consultation with Open Electrical is the best first step.

Curious if a solar battery makes sense for your home? Get a free assessment from our trusted  installers today. Click here.