Do You Still Need Solar Panels If You Have Free Electricity and a Home Battery?
For years, the formula for reducing electricity bills was simple:
Install solar panels.
Add a battery.
Use your own energy instead of buying from the grid.
But electricity retailers are beginning to change the conversation.
With some plans now offering free electricity periods during the middle of the day, homeowners are asking a new question:
If I can charge my battery for free from the grid, do I still need solar panels at all?
It's a fascinating question, and the answer depends entirely on what you're trying to achieve.
The Traditional Solar and Battery Model
Historically, solar panels generated electricity during the day.
That energy would:
Power the home directly
Charge the battery
Export excess energy to the grid
At night, the battery would discharge and reduce the amount of electricity purchased from the retailer.
This remains the most common battery operating strategy throughout Australia.
Enter Free Electricity Periods
Several electricity retailers now offer plans that include free electricity windows, often during the middle of the day when solar generation across the grid is extremely high.
The logic is simple.
Australia now has so much rooftop solar that wholesale electricity prices often collapse during daylight hours.
In some cases, electricity can become extremely cheap or even negative.
Retailers use these conditions to create plans that encourage customers to consume more power during these periods.
For battery owners, this creates an interesting opportunity.
Instead of charging a battery from rooftop solar, the battery could potentially be charged from the grid during the free electricity period.
The stored energy could then be used later that evening when electricity prices are higher.
Could You Skip Solar Completely?
In theory, yes.
Let's imagine a household installs:
30kWh battery
Hybrid inverter
No solar panels
Every day during the free electricity window, the battery charges from the grid.
That stored energy then powers the home through the evening and overnight period.
Technically, the system could operate very much like a solar battery system without any rooftop solar generation.
Benefits may include:
✅ No roof penetrations
✅ No concerns about panel placement
✅ No shading issues
✅ Reduced installation complexity
✅ Lower upfront investment
For some households, particularly those with limited roof space or heritage-listed homes, this could become a genuine alternative worth considering.
The Biggest Advantage: Lower Upfront Cost
Solar panels are often one of the largest components of a renewable energy system.
A homeowner might spend:
$10,000 to $15,000 on solar
$10,000 to $20,000 on battery storage
Removing the solar component may significantly reduce the initial project cost.
The homeowner still gains access to:
Energy shifting
Time-of-use optimisation
Backup power
Battery export opportunities
without installing anything on the roof.
But There Are Some Serious Drawbacks
Before everyone starts removing solar from their quotes, there are several important considerations.
You Are Completely Dependent on Your Retailer
This is perhaps the biggest risk.
A solar system may produce power for 25 years or more.
Retail electricity plans can change with very little notice.
A retailer offering free electricity today may:
Change the hours
Reduce the benefit
Cancel the plan entirely
Withdraw from the market
A strategy that makes sense today may look very different in five years.
Solar generation, on the other hand, remains under your control.
You Lose Energy Independence
One of the biggest attractions of solar is producing your own electricity.
Even if electricity prices rise dramatically, your solar panels continue generating energy every day.
A battery-only strategy means you remain dependent on the grid for every kilowatt-hour entering the system.
Some homeowners are comfortable with this.
Others prefer the security of generating their own energy.
Blackout Performance Is Reduced
Many people install batteries for blackout protection.
What happens if there's a prolonged outage?
A battery-only system eventually runs out of energy.
Without solar panels, there is no way to replenish the battery until the grid returns.
A solar and battery system has a major advantage here.
During daylight hours:
Solar can power the home
Solar can recharge the battery
Backup duration may extend for days
This can be particularly valuable in regional areas prone to extended outages.
Future Retail Plans Are Uncertain
The economics of battery-only systems depend heavily on favourable electricity tariffs.
What happens if:
Free electricity periods disappear?
Time-of-use rates change?
Export tariffs fall?
Network charges increase?
The business case can change quickly.
Solar panels effectively hedge against those future uncertainties.
The Hybrid Approach May Be Best
Personally, I think the most effective solution may not be choosing one or the other.
It may be combining both.
Imagine a home with:
A modest solar system
A large battery
Access to free electricity periods
On sunny days:
Solar charges the battery.
On cloudy days:
Free electricity charges the battery.
The homeowner gains flexibility while reducing exposure to changes in weather or retailer pricing structures.
This approach provides:
✅ Energy independence
✅ Backup capability
✅ Retail tariff optimisation
✅ Protection against future electricity price changes
So, Is Solar Still Worth Installing?
For most homeowners, I believe the answer is still yes.
Solar panels remain one of the lowest-cost sources of electricity available and provide a level of independence that grid charging alone cannot match.
However, the emergence of free electricity periods has undoubtedly changed the conversation.
For some customers, particularly those with:
Limited roof space
Complex roof designs
Heavy evening electricity usage
Large battery systems
a battery-first strategy may become increasingly attractive.
What was once considered unthinkable is now a legitimate discussion.
Final Thoughts
The rise of free electricity plans is forcing homeowners to rethink how batteries are used.
Instead of simply storing excess solar production, batteries can now store low-cost or free grid energy and shift it to more valuable times of the day.
Does this mean rooftop solar is dead?
Absolutely not.
But it does mean the future of home energy may look very different from the solar-only strategies that dominated the last decade.
The best solution will depend on your home, your energy usage, your retailer and your long-term goals.
One thing is certain:
Home batteries are evolving from simple storage devices into sophisticated energy management tools, and that's creating opportunities that simply didn't exist a few years ago.
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Do You Still Need Solar Panels If You Have a Home Battery and Free Electricity?
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With retailers offering free electricity periods, is rooftop solar still worth installing? Explore the pros and cons of charging a home battery from the grid versus generating your own solar power.