Definition: Maximum Input Channels refers to the number of DC input circuits supported by an inverter, typically indicating the maximum allowable PV string connections. . ADNLITE advises ensuring that the total input voltage and current of the modules fall within the inverter's DC input voltage and current range. This is the maximum voltage that can be input into the inverter, meaning the sum of the open-circuit voltages of all panels in a single string should not. . Input Channels & MPPT Inputs: The number of input channels of the inverter refers to the number of DC input channels, while the number of MPPT channels refers to the number of maximum power point tracking channels. The number of MPPTs refers to the number of channels in the inverter that perform. . When deciding how many solar panels can be connected to an inverter, there are several important specifications to consider: Maximum Input Voltage: This is the highest voltage that the inverter can handle safely from the solar panels.