Calculate your electricity costs with solar

If your business’s monthly electricity bill is around $2,000–$5,000 then you are probably classified as a large electricity customer.

Use the calculator below to see how much your electricity bill could be with different sizes of systems. All you need to know is your typical usage (in kWh), the billing period (e.g. one or three months), and how many days (not nights) a week your business operates.

Even if your business’s electricity bill is less than $2,000 per month, you could still enjoy a significant saving on your electricity costs.

How it works

When your business’s use of solar power brings your total grid energy use under 100 megawatt hours (MWh) a year, you will be reclassified from a ‘large customer’ to ‘small customer’ by your local network operator, Ergon Energy or Energex.

As a small customer, you will be billed on a flat rate tariff, not a demand tariff. While a flat rate tariff is higher per kilowatt hour, you will no longer pay demand charges.

You will need to contact your electricity retailer to request the change to a flat rate tariff as soon as possible after your solar system is operational and reducing your grid energy usage.

The network operator may need 12 months of data in order to verify that the installation of your solar system is consistently reducing your grid energy usage to less than 100MWh per year. In the interim you will still benefit from reducing your grid energy usage.

Before installing solar think about your future energy needs and how this might impact the way you’re charged for electricity. If you expand your business, and this increases the amount of grid energy you consume to over 100MWh, your business may be reclassified as a 'large customer' again.