I bought a used RV with three solar panels and simple solar controller. I have purchased a Victron Smart Solar 100/30 to replace it. Attached is a portion of the schematic from manual for the rig, plus my sketch of what I want to do.
The existing controller has only three wires, battery positive, battery negative, and PV. I plan to use the existing PV wire to connect to positive of the Victron PV connection, and the existing negative wire to connect both the PV and battery negatives on the SmartSolar.
My question is can I connect the negative side of solar panels to the negative side of the batteries, along with the negative side of the smart solar output battery connection.