Solar can cut how much power you buy from the grid. How much depends on when you use energy and how your electricity plan works. Understanding those two things is more useful than trusting an impressive savings figure from a generic ad.
The two ways rooftop solar can affect your bill
First, power your panels generate and your household uses straight away replaces power you'd otherwise buy from the grid. Second, unused solar power sent back to the grid may earn a feed-in tariff credit, depending on your retail plan.
In NSW, IPART’s 2026–27 all-day export benchmark is 3.4–6.5 cents per kWh. That's guidance, not a rate your retailer must offer. Compare it with the usage price on your actual bill to see what using your own solar is worth.
A simple example with transparent assumptions
Say solar replaces an average 8 kWh a day of grid power that would otherwise cost an illustrative 30 cents per kWh. That's about $2.40 a day, or $876 over a 365-day year, in power you didn't have to buy.
The example leaves out system cost, export credits, seasonal swings, equipment losses and changing retail tariffs. It's not a prediction for your home.
Why your daily routine matters
Solar generates during daylight. If you run the air conditioner, hot water, laundry, a home office or EV charging while the sun is up, you'll use more of your own generation directly.
If that's not your household, shifting flexible appliances into daylight can sometimes improve the numbers without a battery. Check your tariff first.
Look beyond the first electricity bill
Solar output changes with the seasons. Your costs also move with the weather, family routines and retail tariffs. Compare year on year rather than assuming one low bill means the same saving every month.
A good assessment separates power you no longer buy, export credits, ongoing supply charges and other costs.
Freedom is having a realistic plan
The real benefit of solar isn't a promise of zero bills. It's knowing your options and making a decision that suits your family, budget and home.
Start by checking your electricity use and your roof, then decide how big a system makes sense.
Explore the numbers for your own home
Generic savings claims can't account for your roof, your electricity plan or your daily habits. EnergyBrain gives you an indicative, personalised solar report so you can compare before committing. No pressure, and no installer calls required.
Frequently asked questions
Will solar pay for electricity at night?
Panels generally don't produce power at night. A battery can shift some stored energy into the evening, but it adds cost.
Are feed-in credits the main solar saving?
Often the biggest financial value comes from using your solar in your own home, rather than exporting it.
Why are estimated savings different between solar websites?
Models can assume different tariffs, production, self-consumption, equipment costs and household demand.
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Editorial note (October 2026): Financial examples are explanatory, not quotes or guaranteed savings. Rates, prices, rebates, installation requirements and incentives must be checked again for the date and location of any proposed installation. This article provides general information, not personalised financial advice.