TRON network has an energy price policy established for sending TRC20 tokens like Tether (USDT). This energy is the fee required to perform contract operations.
Please note that energy prices are determined by governance proposals on the TRON network and are subject to change at any time.
Also, when users send TRC20 tokens, an amount of TRX coins equivalent to the energy price is consumed from their TRON account.
Therefore, if there is not enough TRX balance in your TRON account, your transaction will fail with a "FAILED - OUT OF ENERGY" error message.
Recently, a new governance proposal within the Tron network has led to an increase in the price of energy.
Consequently, more energy must be consumed to process TRC20 token transactions, and you need to have at least 100 TRX coins available in your TRON account to avoid transaction failures.
If you don't have enough coins in your account to cover the fee, you can purchase enough TRX coins via an exchange or the "Exchange" service before initiating the transaction.