Hi SidewinderMk, Thanks for reaching out. Electricity bill is calculated mainly using three components usage in kWh, Supply charge and Solar feed in tariff (if applicable). It would be best to compare how much you are paying per kWh usage and supply charge to what you were previously paying to get a better understanding of your energy bill. I would also recommend visiting here to check if you are on the best plan available. Cheers, Deepesh
