6000xp Getting a PV2 voltage reading when no wires are connected

[priorityelec]

I've got the new 6000xp and have been noticing that when my pv1 input is near the max for the panels i setup, i get low voltage reading on the pv2 too even though there is nothing connected to pv2. Any ideas? Inverter is powered off since I don't use it all the time.