TD series, this inverter have five working mode. AC input priority mode, battery priority mode, ECO mode, generator mode and unattended mode.

AC input priority mode, means the appliance will use the AC power first, then use the battery energy.

Battery priority mode, means the appliance will use the battery energy first, then use the AC power.

Eco mode, it is the energy saving mode. When there is no power supply, and use the battery energy to supply the appliance. In this situation, if all the appliances are turn off, the inverter will shut down automatically to save energy in the battery.

And the generator mode, it is similar with the AC priority mode. The appliance will use the energy from generator.

Most important and innovative one is unattended mode.