I just found out that many electricity providers in VIC has reduced their plans from again , (may be from 01/05/2021, but not sure). I just checked and I could save $16 than last month with the same provider.
So, it is better to compare your current one with others and there may be a better deal for you.
VIC Energy Compare is your friend : https://compare.energy.vic.gov.au/
To offset the EV road tax?