Dear Victron,
With the latest high power modules increasing in Voc to above 50V, this has compromised the maximum number of modules in series for your current voltage ranges:
100V Now only 1 module!!
150V Now only 2 modules in series
250V Now needed for 4 modules in series..
With Voc’s now reaching just over 55V for temperatures of 0C, It would make economic sense (to the customers at least) to increase the VMax ranges to 120V, 180V and 300V. (Maybe the last is not needed, and could stay at 250V). Technologically, the change should be fairly simple, but re-approval of the products might put a different slant on this… However, If a product revision takes place, like updating the communications protocol to VE-CAN, for instance, then perhaps the voltage ranges could be upgraded at the same time?
A quick fix would be to produce a Max Voltage limiter that could be wired across the PV inputs, clipping the Max voltage to 1V below the max for the MPPT. Even for the high power modules with 55V Voc, the Max power voltages are all <50V.