A solar feed-in tariff (FiT) is the payment made to solar system owners for the energy they generate and send back into the grid. It is expressed as a rate per kilowatt hour (kWh).
If you do not have a battery, the electricity you generate cannot be stored. So any excess energy generated through your solar panels is pushed back into the grid. Your electricity retailer will provide a credit for this electricity, which is offset against your total bill costs.
In most states in Australia there is a minimum feed-in-tariff that must be offered by retailers, but you will find they vary greatly. But a word of caution, the electricity plan with the highest FiT does not necessarily mean the best outcome for your household. Many retailers seek to entice consumers with a high FiT, but also have high usage rates so you are actually worse off!