Australia’s new battery rebate unlocks huge savings — if your plumbing is ready for it
With electricity bills climbing and solar feed-in tariffs dropping, Queenslanders are looking for ways to store and use their own power more effectively. Thanks to the new Cheaper Home Batteries Program, there’s now up to $4,000 in rebates available, making battery systems far more accessible for everyday households.
But here’s something most people don’t realise:
Your hot water system is likely the biggest power user in your home.
And it’s your plumber — not your solar installer — who decides how efficiently that power gets used.
If you want your battery investment to actually pay off, your plumbing setup has to be part of the plan.
What Is the Cheaper Home Batteries Program?
As of July 2025, homeowners and small businesses in Australia can now access:
- A rebate of up to $372 per usable kilowatt-hour, capped at 50kWh
- Roughly 30% off the purchase and install cost of a typical battery system
- No complex application — it’s applied automatically at point of sale through approved installers
With a rebate of up to $372 per usable kilowatt-hour (kWh) of installed battery capacity, capped at 50 kWh. This translates to a maximum rebate of $18,600 for a 50 kWh system. For a typical 11–13 kWh home battery system, the rebate would amount to approximately $4,000–$4,800, depending on the exact capacity.
This is part of a $2.3 billion national push to help Australians store solar energy, cut grid reliance, and lower energy bills. More details are available on the official Australian Government battery rebate page.
What Do Batteries Have to Do With Plumbing?
It comes down to energy load — and hot water is usually the single biggest load in a home, often consuming 20–30% of total power.
With more homes moving to all-electric setups, your water and energy systems are no longer separate — they’re connected. And that means:
- Your hot water system type determines how much power your battery needs
- Your plumbing layout can help or hinder smart energy use
- A poorly timed system can drain your battery before you even turn on the lights
That’s where a plumber who understands energy flow, not just pipes, becomes essential.
The Winning Combo: Battery + Efficient Hot Water System
Here’s the strategy many of our clients are using:
- Install a high-efficiency electric hot water system, such as a heat pump
- Program it to run during daylight hours when solar is strong
- Store unused solar in the battery for evening usage
- Result: extremely low running costs, improved battery performance, and future-proof compliance
Not sure which system to choose? Get in touch with us — we’ll recommend options based on your household size, usage patterns, and budget.
Smart Plumbing Supports Smart Energy
Here’s how RJT Plumbing and Gas helps you make the most of your battery system:
1. We assess your hot water demand
We calculate how much energy your current system uses, and whether an upgrade will be worth the cost in both savings and compliance.
2. We configure the system to run smart
Using timers and simple logic controls, we set up your hot water to run when your solar or battery is at peak performance — not when the grid is most expensive.
3. We coordinate with your battery installer
We make sure your energy and plumbing systems work together, not against each other — especially if you’re renovating or building from scratch.
Why This Matters More Than Ever
Queensland’s new 7-Star energy rules already push new builds toward efficient, all-electric systems. At the same time, gas prices are rising, rebates favour electric appliances, and battery technology is improving rapidly.
That means:
- Hot water upgrades are no longer optional — they’re strategic
- The value of a battery depends on how and when it’s used
- Smart plumbing helps control one of the biggest costs in your home
If you ignore your plumbing when adding a battery, you’re missing half the opportunity.
What to Do Next
If you’re:
- Planning to install a battery
- Upgrading an old gas or electric hot water system
- Building or renovating
- Looking to cut energy costs long term
Then now’s the time to talk to us.
Contact RJT for Expert Advice
We’ll walk you through:
- Your household usage profile
- How plumbing affects your battery return
- The best system pairing for your situation
- How to take advantage of the current rebates
