My 3-phase MultiPlus II system is configured to send surplus power back to the grid. In my country the limit for such delivery is 253V.
I observe the line voltages and see that L1 in my system usually has the highest voltage, regardless if I deliver back to the grid or not. Many neighbors have solar systems too, I suppose there are more attached to that phase that to L2 and L3.
The MultiPlus attached to L1 delivers most of the power to L1 as well, and that phase approaches 250V regularly. It would make more sense to deliver most excess power to L3 instead, which hovers around 239V. Is this something that Victron is aware of? Is this by design? Is there an easy way to influence this?