Of course, however it depends on certain things such as your system size, your feed in tariff rates and your energy consumption during the day. (the less you use the more you export into the grid
On the occasions that you use more power than your solar panels are generating, you will be importing (buying) electricity from the grid to power your home.
The wonder is, you need very little maintenance. One and only thing we highly recommend is that you keep your panels nice and clean.
At Victorian Solar Light, we only use BCSE and CEC accredited installers and licensed electricians. That way we can guarantee quality control.