The solar panel is equipped with PV-rated, output Multi-Contact 4 cables,The Positive connector is a male connector and the
negative connector is a female connector, these wires by themselves are rated for series connections.
When the solar panels are connected in series (+ connected to -, + connected to-), the voltage is added;
when the solar panels are connected in parallel (+ connected to +,-connected to -), the current is added.
Note: Parallel connection, it need to purchase extra Multi-Contact 4 Y connectors, (Negative to Negative, Positive to Positive)