Australians can make rooftop solar electricity for about $0.04 per kilowatt-hour. In NSW, buying that same power from the grid costs between $0.30 and $0.40 per kilowatt-hour.
This six- to eight-fold difference is why almost 40% of Australian homes now have solar panels, the highest rate in the world. If you don’t have solar yet, or if you do but still get high bills, this article is for you.
PSC Energy installs solar and battery systems across NSW every week. We see the actual numbers before and after installation, so we know what really helps lower your household energy bill.
In this article, you’ll learn:
- Why Rooftop Solar in Australia Is the Cheapest in the World
- What the Numbers Mean for Rooftop Solar in NSW
- NSW Energy Price Gap: Why Solar Alone Is Not Enough
- The All-Electric Home: Cut Your Gas and Fuel Bills Too
- Home Batteries and Energy Resilience
- Battery Rebates in NSW: What Is Available Right Now
- What to Do First
- FAQ: Rooftop Solar NSW
By the end of this article, you’ll know why rooftop solar is so affordable in Australia, what it means for your costs in NSW, how an all-electric home works, and which steps to take first to manage your energy bills.
Why Rooftop Solar in Australia Is the Cheapest in the World
Australia has the world’s cheapest rooftop solar for good reason. Several factors made this possible, and they still matter today.
- Scale: Australia has one of the biggest residential solar markets in the world. When installers put in thousands of systems each year, costs drop across the whole supply chain.
- Streamlined regulation: Australian standards for solar installations are clear and well-known in the industry. Installers spend less time on paperwork, which cuts labour costs.
- Built-in marketing: Solar companies in Australia spend little on advertising. Rooftop panels are visible everywhere, so the product sells itself.
- High skill levels: A large, experienced installer workforce keeps installations quick and reliable.
These conditions are not changing. In fact, as system sizes keep growing and new installations now average about 11 kW, costs keep falling.
If you’re interested in learning more about solar systems, you might want to check out our introductory article titled, New to Solar: Start Here.
What the Numbers Mean for Rooftop Solar in NSW
A fully installed 10 kW solar system in Australia costs about $10,000 and lasts around 20 years. A system this size produces around 11,000 to 12,000 kilowatt-hours of electricity per year in NSW, based on real-world output data for New South Wales.
Here is how that translates into a cost per unit of electricity:
- System cost: $10,000
- Lifespan: 20 years
- Annual output: ~11,500 kWh
- Total output over 20 years: ~230,000 kWh
- Cost per kWh generated: ~$0.04
For most NSW homeowners, the key comparison is not the feed-in tariff, but the retail rate you pay for grid electricity.
At $0.30 to $0.40 per kWh, this is six to eight times more than making your own power. Every kilowatt-hour you generate and use saves you that difference. Over 20 years with a 10 kW system, these savings add up.
Rooftop solar in NSW is now cost-effective, even without subsidies or high export rates. Making your own electricity costs much less than buying it from any retailer.
If you’re interested in learning a bit more about solar panels and energy systems, you might want to check out the following article titled, Are Solar Panels Worth It in NSW, Australia? A Price Breakdown for 2026.
NSW Energy Price Gap: Why Solar Alone Is Not Enough
If you already have solar but still get a large electricity bill, the main reason is the gap between the feed-in tariff and your solar system.
- What you pay to buy electricity from the grid: $0.30 to $0.40 per kWh
- What you earn for electricity you export to the grid: $0.04 to $0.07 per kWh
Your solar system produces the most power in the middle of the day, when your home uses the least electricity because people are often at work or school. The extra power goes to the grid and earns you a low export credit.
In the evening, your electricity use goes up. Lights are on, the oven is running, the air conditioning starts, and devices are charging. By then, your solar panels have stopped producing, so you buy power from the grid at the full retail rate, the same rate you didn’t save on during the day.
As a result, many solar households in NSW generate plenty of energy but only get a small part of its value. The answer isn’t a bigger solar system.
Instead, you need to use and store more of the power you generate, so less goes to the grid at $0.04 and more replaces grid power at $0.35.
If you’re interested in learning a bit more about solar batteries, you might want to start with the following article titled, Adding a Battery to a Solar System.
The All-Electric Home: Cut Your Gas and Fuel Bills Too
Going all-electric helps you save even more with solar. An all-electric home doesn’t use gas or petrol, so you avoid those costs. All your energy needs, including heating, cooling, cooking, hot water, and transport, are powered by solar electricity.
Here is what an all-electric household looks like in practice:
- Hot water: A heat pump hot water system replaces a gas or electric resistance unit. Heat pumps use roughly one-third as much energy as a traditional electric heater. Most systems include a storage tank with a capacity of 10 to 15 kWh, which you can set to charge during the middle of the day using solar power.
- Space heating and cooling: A reverse-cycle air conditioner handles both. It is far more efficient than gas heating or a resistive electric heater. A timer or smart schedule moves the bulk of heating and cooling load to daytime, when solar power is available.
- Cooking: Induction cooktops use electricity and are faster and more efficient than gas cooktops.
- Clothes washing and drying: Both can run on a timer set to daytime hours, powered directly by solar energy.
- Dishwasher: Same principle. Set it to run at midday.
- Electric vehicle: An EV charges from your solar system during the day. It replaces petrol costs with near-zero fuel costs. An EV battery also stores 40 to 80 kWh of energy, a significant storage capacity.
The main idea is to move as much appliance use and charging as possible to the daytime, when your solar panels are making electricity. Simple timers can handle most of this for you, so you don’t have to do it manually.
If you’re interested in learning a bit more about how to save with solar, you might want to check out the following article titled, Self-Consumption: How to Increase Solar Energy Use.
Home Batteries and Energy Resilience
A home battery stores solar energy you generate during the day and releases it in the evening. It solves the timing mismatch directly.
Battery storage options for an all-electric home include:
- Heat pump hot water tanks: These provide 10-15 kWh of effective thermal storage. While not a traditional battery, they work in a similar way because you store energy when it’s cheap and use it when it would otherwise cost more.
- Home batteries: 10 to 40 kWh of usable capacity. These sit between your solar system and the grid, capturing surplus generation and dispatching it when you need it.
- EV battery: 40-80 kWh. Some EV models and compatible charging setups support bidirectional charging, allowing the car to power the house. This capability is expanding across more vehicle models.
Energy resilience is a major benefit for battery owners. If the grid goes down during a storm, heatwave, or infrastructure problem, a home with solar and a battery can keep running.
The solar system charges the battery during the day, and the battery powers your home at night. For most households, this covers almost all normal use during an outage.
This kind of independence from the grid is a real and measurable benefit, separate from the financial savings.
If you’re interested in solar batteries, you might want to check out the following article titled, Are Solar Batteries Worth It in NSW? PSC’s Ultimate Guide for 2026.
Battery Rebates in NSW: What Is Available Right Now
Two incentives are currently available to NSW homeowners installing a battery, and you can use both together.
Federal Cheaper Home Batteries Program
- Reduces the upfront cost of an eligible battery installation by approximately 25%.
- The rebate value is roughly $238 per kWh of capacity for the first 14 kWh.
- Applies to batteries with usable capacity between 5 and 100 kWh.
- Available whether you are adding a battery to an existing solar system or installing solar and battery together.
- Requires installation by a SAA-accredited installer
NSW Virtual Power Plant (VPP) Incentive
- An NSW Government incentive paid upfront for connecting your battery to a Virtual Power Plant.
- A VPP is a network of home batteries linked by software. When the grid comes under pressure, the network releases stored energy to help stabilise supply. Your provider manages this automatically within agreed limits.
- Incentive amounts: Up to $550 for a 10 kWh battery. Up to $1,500 for a 27 kWh battery. Roughly $55 per usable kWh of capacity
- The battery must have between 2 and 28 kWh of usable capacity to qualify.
- One claim per home (per electricity meter).
- Stackable with the federal rebate.
Together, these rebates make it much easier to afford a battery. For a typical 10 kWh system, you can save thousands of dollars on the installed price.
Keep in mind that VPP providers like AGL, Amber, Engie, Origin, and others all operate independently. Each has different contract terms, payment structures, and rules about how much of your battery they can use or whether you need to switch retailers.
It’s smart to compare a few before signing up.
If you’re interested in learning a bit more about solar and battery rebates in NSW, Australia, you might want to check out the following article titled, Ultimate Guide to Australia’s 2026 Solar Rebate and Battery Rebate: Federal and NSW Rebate for Solar.
What to Do First
Switching to an all-electric, solar-powered home isn’t just one decision. It’s a series of steps, and the order matters.
- If you don’t have rooftop solar yet, start there. It’s the foundation for everything else. Batteries, heat pumps, and EVs all work better and cost less when you have solar making cheap electricity during the day.
- Check your last three electricity bills to see how much power you buy from the grid and when you use it. If you use a lot of electricity in the evening and your solar credits are low, adding a battery is probably your best next step.
- Upgrade an older or undersized system before adding a battery. A battery connected to a poorly performing system won’t work well either. If your panels are more than ten years old or your system is too small for your current usage, check the panels first.
- Replace gas appliances as they wear out. There’s no need to remove a working gas system. When your hot water system or heater needs replacing, choose a heat pump instead.
- Think ahead about switching to an electric vehicle. If you’re planning to buy or replace a car soon, consider how it will work with your solar and battery setup. A larger solar system and a battery that supports two-way charging help you get the most from an EV.
- Take advantage of both rebates. When you’re ready to add a battery and claim the federal Cheaper Home Batteries Program rebate and the NSW VPP Incentive, make sure you use a SAA-accredited installer to qualify for both.
If you’re interested in learning more about the Cheaper Home Batteries Program and its recent changes, you might want to check out the following article titled, Changes to the Australian Government’s Cheaper Home Batteries Program Explained.
Wrapping Up: Power to the People
Rooftop solar in NSW lets you make electricity for about $0.04 per kWh, while the grid charges six to eight times more. An all-electric home closes this gap by using and storing solar power for all your needs, like heating, cooling, hot water, and transport, so the savings work for you.
The main steps are simple: install solar, shift your appliance use to the daytime, add a battery to store and use your solar power at night, replace gas appliances with heat pumps as they get older, and plan for an EV. Use both the federal battery rebate and the NSW VPP Incentive to lower your upfront storage costs.
Australia leads the world in rooftop solar for good reason. The savings are real, the technology works, and support is available. NSW homeowners who start now can generate their own electricity for decades at a much lower cost than the grid.
PSC Energy installs solar and battery systems throughout NSW. If you’d like to see how this could work for your home and energy use, contact PSC Energy for a no-obligation chat. It’s what we do.
If you’re interested in learning more about the changes to the federal battery rebate, you might want to check out the following article titled, Is the Federal Battery Rebate Still Available?
FAQ: Rooftop Solar NSW
How much does rooftop solar cost in NSW?
A fully installed 10 kW system costs around $10,000. Prices vary depending on system size, panel brand, inverter type, and roof complexity. Most residential systems in Australia now average around 11 kW. The cost per kilowatt-hour generated over a 20-year lifespan is approximately $0.04 in NSW, far below what any retailer charges.
How much can rooftop solar save me on my NSW electricity bill?
The savings depend on how much of your solar generation you use directly. Every kilowatt-hour you generate and use yourself replaces electricity you would have bought at $0.30 to $0.40 per kilowatt-hour. A well-sized system with good daytime usage habits can cut a household’s electricity bill by 60 to 80 per cent. Adding a battery and shifting evening usage to stored solar energy can further reduce the bill.
Why is my electricity bill still high if I have solar panels in NSW?
The most common reason is a mismatch between the feed-in tariff and the market price. NSW feed-in rates sit at $0.04 to $0.07 per kWh. If your solar surplus flows to the grid at that rate and you buy it back in the evening at $0.30 to $0.40, you are not capturing most of the value your system produces. A battery, daytime appliance scheduling, or both will usually fix this.
What is the best battery rebate available for NSW homeowners?
Two rebates are currently available, and you can claim both. The federal Cheaper Home Batteries Program reduces the upfront cost by roughly 25% off. The NSW VPP Incentive pays up to $1,500 upfront for connecting your battery to a Virtual Power Plant. Together, they reduce the cost of a typical 10 kWh battery by several thousand dollars.
What happens to my rooftop solar system if the grid goes down?
A solar system without a battery will shut down during a grid outage for safety reasons. A solar system with a battery can keep your home powered. The battery stores energy during the day and supplies it at night. For most households, this covers nearly normal operation for the duration of a typical outage.
Is an all-electric home in NSW actually cheaper to run?
For most homeowners with solar, yes. An all-electric home removes gas bills and vehicle fuel costs and replaces both with electricity you largely generate yourself. Heat pumps for hot water and space heating use significantly less electricity than resistive heaters. An EV charges on solar during the day at near-zero fuel cost. The combination of solar, storage, and electrified appliances typically results in a lower total energy spend than a conventional gas-and-grid household.
