A feed-in tariff (FiT) is the rate an electricity retailer credits you for surplus solar power your system exports to the grid. The rate varies between retailers, electricity plans and states, and is usually much lower than the price you pay for electricity from the grid. Comparing the FiT alongside daily supply charges, usage rates and any battery benefits can give a clearer view of overall value. Your retailer sets the applicable terms, so check the current plan details and your state’s energy regulator guidance before switching.