You’ve made the smart choice to invest in solar—but now you’re wondering, “Should I add a battery too?”
In Brisbane , 6.6kW solar systems are one of the most popular sizes for households. They’re efficient, cost-effective, and usually enough to power most homes during the day.
But without a battery, your system might not be doing all it can. In this blog, we’ll help you decide whether battery storage is worth it for your setup—and which options are best.
What Does a 6.6kW Solar System Do Without a Battery?
A 6.6kW solar system typically generates around 24 to 28kWh per day, depending on where you live and the weather conditions.
This size is ideal for covering daytime power usage, like running the fridge, lighting, and other appliances.
But here’s the catch—any excess energy you don’t use is sent back to the grid. And with feed-in tariffs dropping, the return isn’t as good as it used to be.
At night or on cloudy days, you’ll still be buying power from the grid, often at peak rates. This is where battery storage can step in.
What Changes When You Add Battery Storage?
Adding a battery to your 6.6kW solar system gives you much more control over your energy usage. Here’s how:
- Store excess power generated during the day to use in the evening
- Reduce your electricity bills by avoiding peak-time usage
- Stay powered during blackouts—great for families or those working from home
- Increase your solar ROI by using more of the energy you generate
- Lower your carbon footprint by relying less on fossil-fuel-powered grid energy
Common Scenarios: When You May Not Need a Battery
While batteries add lots of benefits, they’re not essential for everyone. You might not need one if:
- You use most of your power during the day (e.g. if you’re retired or work from home)
- Your electricity bills are already low
- You want to keep installation costs as low as possible
- You’re planning to add battery storage later when budget allows
When Battery Storage Does Make a Big Difference
In these situations, battery storage can be a game-changer:
- Higher evening or 24/7 energy usage – running lights, heating/cooling, cooking, and entertainment
- With time-of-use pricing, electricity costs more during busy hours—batteries help you avoid those higher rates.
- Frequent blackouts – especially in areas prone to storms or grid instability
- Electric vehicle charging – reduce the cost of running an EV
- Growing households or future expansion plan
6.6kW Solar System + FoxESS Battery Options
To meet a range of energy needs, FoxESS offers high-voltage (HV) battery packages that are modular and scalable.
Each unit has a usable capacity of 4.196kWh, and you need at least two batteries (1 master + 1 slave) to start.
You can stack up to 8 batteries in one system.
Here’s a breakdown of FoxESS battery options for 6.6kW systems:
6.6kW + 9.2kWh FoxESS Battery
- Usable: 8.392 kWh
- Ideal for small homes
- Covers light evening use and emergency backup
- Price: $3,499
6.6kW + 13.8kWh FoxESS Battery
- Usable: 12.588 kWh
- Balanced for medium-sized families
- Great for evening cooking, entertainment, and heating/cooling
- Price: $4,648
6.6kW + 18.4kWh FoxESS Battery
- Usable: 16.784 kWh
- Suits larger homes or homes with higher night-time loads
- Offers solid blackout protection
- Price: $5,797
6.6kW + 23kWh FoxESS Battery
- Usable: 20.980 kWh
- Future-ready solution
- Ideal for energy independence or homes with EVs
- Price: $6,946
Thinking Bigger? 13.2kW Solar System with Battery
For high-energy households with larger appliances, pools, or electric vehicles, a 13.2kW solar system Brisbane paired with FoxESS batteries may be more suitable.
This setup generates nearly double the daily output and works well with higher-capacity storage.
Here are the matching battery packages for 13.2kW systems:
- 13.2kW + 9.2kWh Battery – Basic backup, small home
- 13.2kW + 13.8kWh Battery – Standard family-sized storage
- 13.2kW + 18.4kWh Battery – High-use households
- 13.2kW + 23kWh Battery – Maximum power and coverage
How Much Does a 6.6kW Solar System with Battery Cost?
Let’s look at general pricing for 6.6kW + FoxESS battery combos :
| System Setup | Usable Capacity | Price (AUD) |
| 6.6kW + 9.2kWh Battery | 8.392 kWh | $3,499 |
| 6.6kW + 13.8kWh Battery | 12.588 kWh | $4,648 |
| 6.6kW + 18.4kWh Battery | 16.784 kWh | $5,797 |
| 6.6kW + 23kWh Battery | 20.980 kWh | $6,946 |
Note: These prices are for battery packages only. Full system quotes may vary based on site conditions, rebates, and installation needs.
Why Choose QuickSolar for Your Solar + Battery Setup
Quick Solar is a local Brisbane Company helping homeowners take control of their energy with practical, well-designed solar and battery systems.
We don’t believe in one-size-fits-all packages—instead, we tailor every setup based on how you use power and what you plan for the future.
From helping you choose the right battery to making installation easy, we’re here to make the switch to solar simple and worthwhile.
- We understand how Brisbane homes use energy and design systems that work with the local weather and available government rebates.
- Our installers are fully certified and meet Clean Energy Council standards for safety and quality.
- Every system is built around your energy habits, household size, and future plans—not just pulled off a shelf.
- We use trusted, proven products like FoxESS that offer solid performance and long-term reliability.
- You’ll get honest pricing from day one, with no surprises or hidden costs later.
Is a Battery Worth It?
A 6.6kW solar system is a great investment for most homes—but pairing it with the right battery can take your setup further.
With options from 9.2kWh to 23kWh and beyond, FoxESS offers scalable battery solutions that match your current and future energy needs.
Whether you’re after lower bills, blackout protection, or full energy independence, battery storage is a smart upgrade that more homeowners are now choosing.
Need help choosing the right battery size?
Request your free solar and battery quote from QuickSolar today: Contact Us