TRON users who regularly send USDT or interact with smart contracts may encounter network fees that are not always easy to predict. One way to manage those costs is to use Energy, a resource required for certain transactions on the TRON network. http://tron-energy.com is a website focused on this part of the TRON ecosystem. Here is an overview of what visitors should consider when evaluating the service and deciding whether it suits their needs.

## Understanding the service

TRON uses several network resources, including Bandwidth and Energy. Energy is generally needed when a transaction involves smart-contract execution, such as sending USDT to an address that already has a token account. If a wallet does not have enough of the required resources, the network may use TRX to cover the cost instead. For people who make these transactions frequently, obtaining Energy can be a way to manage how their TRX is used.