I have a 12v Quattro II 3000 2x120v installed in my RV, up and running. Hooked up to shore power I have 240v across L1 and L2 on AC-in-2 (shore) and 240v across L1 and L2 on AC-out-1. However on AC-out-2 I only have 120v across L1 and L2. Measured between L1 and ground I have 120v and measured between L2 and ground I have 1v (note that it’s a 240v EV charger with no neutral hooked up to AC-out-2). I double checked torque on screws and am taking reading directly on the screws.
I have a Cerbo GX, Touch, Smart Shunt in the system.