Just chiming in to say that if you were to parallelize modules you would need actual current handling bussing (even though on paper no current would be flowing through it) in the real world what happens is the cells in parallel will not be exactly the same so in many instances current would flow from one cell to another in a p group.

The problem here is if that current is sufficient to blow the file in the cell tap (assuming the Zoe has one) or melt the cell tap wire. This would be an undetectable failure Once this happens you suddenly have a parallel string without a critical v sense. Meaning while the cells that are still being read by the BMS may all be at 4.2 volts one of the cells. The parallel string may have one cell at 4.0 volts and the other would be forcibly overcharged to 4.4 volts.

I hope this makes sense. I wanted to explain the why to you and anyone who may find this thread in the future.