How does the tool calculate the estimated savings?

Savings are based on your current estimated electricity bill (tariff * electricity usage) less your estimated new electricity bill (tariff * total electricity used from the grid – potential solar feed-in). 

Your new solar system means you will be using less energy from the grid. If you’ve chosen a solar, battery and smart energy kit then we estimate you’ll see greater savings than the tool shows. 

Depending on where you live (the sunnier the location, the more solar generation), and when you use your electricity (e.g. work from home and use electricity when it’s sunny) your grid usage will change.