Not necessarily, this depends on the retailer. Your usage tariff to buy electricity might be the same as previously, or your retailer may only offer a different tariff. The tariff structure may also change in regard to peak and off peak tariffs. For the majority of people, this may not significantly impact on
their overall annual bill. Whether a customer is better or worse off will depend on their energy use pattern. Some retailers might only offer a flat rate once you have solar power. Others might switch you from a flat tariff to a peak and off-peak tariff. You should discuss this issue with your retailer
before committing to solar power and it is advisable to shop around to make sure you get the tariff structure that you want.
If you currently have a peak and off-peak tariff and use a lot of electricity during off-peak times (such as for dedicated hot water heating, slab heating, air conditioning or pool pumps) it may be better for you to retain this tariff. In this situation if you lose your present tariff, you may be financially worse
off by installing solar power.