The S2400 has two MPPT inputs (two PV inputs), each with a voltage range of 10-100V. Connecting a standard PV module (e.g., 450Wp (peak power)) will ensure normal operation. The maximum number of PV panels that can be linked should be determined by consulting the PV panel data sheet (maximum open-circuit voltage). Ensure that the total open-circuit voltage of the PV panels, whether connected in series or parallel, does not exceed 100V.