With the rapid expansion of residential solar systems, many Australians are curious about supplementing with a solar battery. Our clients often wonder, “How Do Solar Powered Batteries Work?”.
Here, we’ll simplify the solar battery storage process, cover the benefits of solar battery systems, and help decide if it is the right choice for your home.
Understanding Solar Battery Systems
What Is a Solar Battery?
A solar battery is a type of energy storage system used to supplement solar PV systems. Solar batteries store excess energy generated by solar panels during the day.
This stored energy can then be used to power households when the sun is not shining, such as cloudy days or during the night. This reduces reliance on the electrical grid and can lead to even higher cost savings over time.
Learn more about solar batteries in our in-depth guide: How To Find the Best Solar Battery Package.
How Solar Batteries Store and Release Energy
How Do Solar Powered Batteries Work?
Here’s a simple breakdown of how solar batteries work:
- During sunny days, the solar cells absorb sunlight
- This sunlight is absorbed and converted by the solar inverter into usable energy (AC electricity) to power your home
- The switchboard directs AC electricity to where it is needed
- With a solar battery, any excess solar energy is sent to the inverter
- This excess energy charges the solar battery and gets stored
- The solar battery has an inverter to convert stored energy into AC electricity
- When the sun sets or if your solar panels aren’t generating enough electricity to meet your needs, you can utilise the energy stored in the battery
We recommend this excellent resource if you are interested in learning more about the solar battery process: How does a solar battery system work? | solar.vic.gov.au.
What Happens if the Solar Battery Runs Out of Power?
If the solar battery runs out of power while you are drawing energy from it, this is known as fully discharging. If your solar battery discharges, the system automatically switches back to drawing electricity from the grid.
You May Also Like: Our Guide to Understanding How Do Solar Panels Work?
Different Types of Solar Batteries
Common types of solar batteries include:
- Lithium-Ion Solar Batteries: Lithium ion batteries are efficient, long-lasting, compact, and lightweight. Most residential solar systems utilise this battery option. Lithium-ion phosphate (LFP or LiFePO4) and lithium nickel manganese cobalt oxide (NMC) are the most common options. LFPs are hailed as the safest option because NMCs are at risk of overheating if discharged too fast.
- Flow Solar Batteries: Flow batteries utilise liquid electrolytes to store energy. Flow solar batteries are considered safe, innovative, and easy to maintain. However, they are generally used in more specialised applications due to their higher cost and reduced efficiency compared to lithium-ion batteries.
- Lead-Acid Solar Batteries: For safety reasons, sealed lead acid (SLA) batteries have recently replaced ‘flooded’ lead-acid batteries. Lead-acid solar batteries are mostly found in off-grid solar systems. They are more affordable than lithium-ion batteries but less efficient.
Learn More: What Are Your Solar Energy Storage Options in Sydney?
Can Solar Panels Charge a Battery During a Power Outage?
Solar panels can charge a battery during a power outage, but it requires the proper setup. Typical grid-connected solar systems shut down during outages.
To charge a battery during a power outage, the solar system must be paired with a hybrid inverter and battery. Off-grid and hybrid solar battery setups can continue supplying power, even in the event of a blackout.
If blackout protection is a priority for your household, make sure to work with a licensed solar technician. Working with an expert will ensure you choose a battery and setup that will meet your needs.
Are Solar Power Batteries Worth It?
Benefits of Solar Power Batteries
While solar battery systems can save money and maximise independence from the grid, they are not suitable for all households or solar systems.
Here are some considerations to help you determine, “are solar power batteries worth it for me?”:
- Cost Savings: Having a solar battery system to store excess energy you generate can reduce electricity costs. This can lead to immediate and long-term savings. However, it is important to note that you will likely still need to draw some electricity from the grid. You’ll most likely need to pay a daily supply charge to cover your connection to the network as well.
- Make the Most of Your Solar Energy Investment: Investing in a solar battery can maximise the amount of solar energy you generate and use. The right solar battery system can also minimise the amount of electricity you need to buy back from the grid. These savings can help maximise your return on investing in solar energy.
- High Electricity Rates: If you are looking to minimise your energy costs and enjoy protection against rising electricity rates, a solar battery may be ideal.
- Blackout Protection: If your area experiences frequent blackouts, solar power batteries may be a good solution to consider.
- Independence: Solar battery storage can help you enjoy decreased reliance on the electrical grid.
- Environmental Benefits: Using stored solar energy instead of drawing from the grid can reduce your carbon footprint and support sustainable energy usage.
- Take Advantage of Solar Rebates: The New South Wales (NSW) government offers various incentives and rebates to help offset the cost of solar battery storage. The WA state government has also pledged a $387 million program that is to be confirmed for 1st July 2025. Learn more about the available solar rebates here:
Choosing the Right Solar Battery for Your Home
Choosing the right solar battery for your home involves a variety of factors. If you already have a solar PV system, a solar battery system may not be compatible. We can evaluate if your solar PV system is suitable for solar battery connection.
You’ll also want to make sure your solar PV system generates enough excess solar power to justify a solar battery.
Working with a licensed solar expert is the best way to ensure you find a solar battery and system that meets your needs.
It can be confusing to determine what kind of battery you need, battery capacity, and compatibility. Our solar technicians handle all of the details, calculations, measurements, and specifications to make sure we tailor a solar battery to your exact energy needs.
We evaluate these considerations to find the ideal solar battery option for clients:
- Battery capacity,
- Battery lifespan,
- Battery compatibility with existing solar systems.
- Type of battery
- Warranty
- Home energy habits
- Blackout protection, if desired
- Budget
Become More Energy Independent with the Benefits of Solar Battery Storage
Solar batteries can help you enjoy maximum energy independence, cost savings, and blackout protection.
Ready to take control of your energy usage? Explore the benefits of solar battery storage and maximise your solar investment. Contact Aus Energy Solar today for expert advice on the best battery solution for your home.
