How to Choose the Right Solar Battery in 2025
With electricity prices rising again in July and the federal solar battery rebate finally launching, Australians are rapidly switching to solar battery systems to lower their energy bills and boost energy independence. If you’re thinking about joining them, you’re in the right place.
Choosing the right solar battery can feel confusing—but this practical guide will walk you through everything you need to know: how they work, how to size one for your home, installation options, and how to make the most of the solar battery rebate.
Why More Australians Are Choosing Solar Batteries in 2025
Solar batteries are transforming how homes manage energy. They allow you to store excess solar power generated during the day and use it at night—when grid electricity prices spike.
- Daytime solar: Generates power, fills your battery
- Night-time: Battery discharges, reducing grid reliance
- Blackouts: Certain systems can provide backup
- Surplus energy: Any extra power can still be exported to the grid
With retail energy rates jumping to over 50c/kWh in peak times, batteries give you control over costs and protect against future price rises.
Key benefits of installing a solar battery:
Use more of your own solar power- Avoid peak demand tariffs
- Enjoy backup power during blackouts
- Reduce your carbon footprint
- Improve your energy independence
And with rebates now available, payback periods have shrunk to just 4–6 years.
Do You Actually Need a Solar Battery?
Before diving into quotes and sizing, here are three simple questions to see if a solar battery makes sense for your home:
- Do you use power at night?
- Do you already have solar (or plan to install it)?
- Do you have space for a battery installation?
If you answered yes to all three, you’re already a strong candidate. The rest comes down to choosing the right system.
How to Size Your Solar Battery System
Your solar battery should match your solar system size and night-time usage. Here’s how to get the balance right:
1. Understand Your Energy Use
Let’s say your electricity bill shows you consume 20 kWh per day, with 75% used at night. That means 15 kWh needs to be covered by a battery.
2. Size Your Solar System
A 7 kW solar system typically generates around 25 kWh/day on average. If you use 5 kWh during the day, that leaves 20 kWh available for battery charging.
✅ Ideal match: 7 kW solar system + 20 kWh battery
3. Factor in an EV (if applicable)
A small EV might need 4–8 kWh/day to charge 10–20%. To charge your EV using solar power:
Increase solar system by 1–2 kW
Increase battery size by 4–8 kWh
4. Consider Backup Needs
Do you want blackout protection? If yes, make sure your battery is set up with a critical load circuit (e.g. fridge, lights, internet).
AC Coupling vs DC Coupling: Battery Installation Types
When adding a solar battery, you have two main installation options:
AC Coupled (Retrofitting)
Ideal for homes with existing solar
Battery connects to home independently
Easier to install but slightly less efficient
DC Coupled (New Systems)
Install solar panels, inverter, and battery together
More efficient and often cheaper for new builds
Better integration and fewer components
Before installation, your accredited installer will inspect the site, assess safety, ventilation, wall strength, and any state-specific compliance rules.
How Solar Batteries Actually Work
Let’s break it down simply:
Daytime: Your solar panels produce energy
Battery charges: Unused solar fills the battery
Evening/night: Your home draws from the battery
Grid backup: If the battery depletes, grid power kicks in
If the battery is full, surplus energy still exports to the grid.
What Type of Battery Is Best in 2025?
Lithium iron phosphate (LFP) batteries are the most popular choice in 2025—and for good reason:
Safe and thermally stable
Long lifespan: 10–20 years warranty
No cobalt or nickel (ethically sourced)
Low maintenance
Avoid older tech like lead-acid or nickel-based batteries, which are outdated and less efficient.
Make the Most of the Solar Battery Rebate
Thanks to the new solar battery rebate, homeowners across Australia can now access thousands of dollars in savings. Rebates vary by state and federal scheme—but most homeowners are seeing:
Federal rebate available from July 2025
State-specific schemes (e.g. VIC, SA) offer additional support
Rebates apply only to systems installed by Clean Energy Council (CEC) accredited installers
💡 Pro tip: Always ensure your installer provides warranty documents, compliance certificates, and full shutdown instructions.
Real-Time Monitoring & Maintenance
Today’s solar batteries include smart apps and dashboards to track:
Battery charging/discharging
Solar generation
Grid exports and imports
System health and alerts
Most systems are low-maintenance, but we recommend:
Annual check-up to protect warranty
Regular app checks to optimise performance
Ready to Get Started? Here’s Your Next Step
Installing a solar battery in 2025 is a smart investment that pays for itself quickly—and future-proofs your home against rising power costs. With the solar battery rebate now in place, there’s never been a better time to act.
👉 Visit Australian Battery Quotes: Free Battery Quote Comparison to get three free quotes from trusted, local accredited installers.
