Loading Solar Battery Perth...
Loading Solar Battery Perth...
Your Synergy electricity bill holds the key to understanding how much a battery could save you. This guide breaks down each section of your bill, explains the DEBS time-of-use tariff, and shows a real before-and-after comparison for a typical Perth household.
Understanding your Synergy electricity bill is the first step to making informed decisions about solar and battery storage. Here is what each section means and why it matters.
This is the fixed daily charge you pay simply for being connected to the Western Power grid. It appears regardless of how much electricity you use or generate. The current residential supply charge is approximately $1.08 per day. You cannot avoid this charge with solar or batteries — it is a fixed cost of grid connection.
This section shows the electricity you imported (drew) from the grid, measured in kilowatt-hours (kWh). The charge is calculated by multiplying your usage by the applicable rate. On the standard A1 tariff, this is a flat rate of approximately 30.17 cents per kWh. If you are on the DEBS (time-of-use) tariff, rates vary by time of day.
If you have solar panels, this section shows the electricity you exported back to the grid. Export credits appear as negative charges, reducing your total bill. The rate you receive depends on your tariff and the time of export.
Your total is calculated as: supply charges + energy usage charges - solar export credits + GST. Synergy bills are issued quarterly (every three months), so multiply any daily figures by approximately 90 days to estimate your quarterly bill.
The Distributed Energy Buyback Scheme (DEBS) is Western Australia's time-of-use tariff designed for homes with solar systems. Unlike the flat A1 tariff, DEBS pays different export rates depending on when you send electricity back to the grid — and this has significant implications for battery strategy.
The DEBS tariff structure creates a clear financial case for batteries:
For homes without a battery, DEBS can improve export income if your panels face west and generate into the peak window. For homes with a battery, the tariff choice matters less because you are self-consuming most of your solar generation.
If you have solar panels, your Synergy bill includes a separate line item for electricity exported to the grid. Understanding this section helps you evaluate whether a battery could improve your financial return.
Export credits appear as a negative charge on your bill, reducing the total amount due. Your bill will show:
Your bill shows two key energy figures. Comparing them reveals how effectively you are using your solar generation:
These rates have decreased significantly over the past five years and may continue to fall as rooftop solar penetration in Perth increases. This trend makes self-consumption through battery storage increasingly attractive.
The best way to understand a battery's financial impact is to compare two real-world scenarios for a typical Perth household with a 6.6kW solar system.
These figures are based on summer generation. In winter, solar generation drops and savings will be lower. A realistic annual average for Perth is typically $800-$1,200 depending on household size, usage patterns, and battery capacity.
Now that you understand how your Synergy bill works, you can see exactly where a battery saves money: by shifting cheap midday solar into expensive evening self-consumption. The bigger the gap between your export kWh and import kWh, the more a battery can save you.
Use our tools to estimate how much a battery could reduce your Synergy bill based on your actual usage and Perth solar conditions.
Six questions, two minutes. We'll match you with CEC-accredited Perth installers who quote based on your actual usage.