Smartsolar MPPT regulator residual voltage

Hello
I come to you hoping to have an answer
in fact I have missing information from victron on the smartsolar range
I have 5 independent strings so connected to 5 smartsolar
3 mptt of 150/35 and 2 smaller in 100/20

for maximum protection I will therefore make a DC protection box for my 5 stings

however I cannot find on a smarsolar 100/20 the residual voltage in microseconds maximum to support, do you have any idea?
on the smartsolar 150/35 it is indeed 600 volts of residual level of protection for lightning in particular as described in the video with yoann le fol during a victron africa webinar.

regarding the fuses on the smarsolar 100/20 there is a 25A fuse but on the 150/35 I don’t see any visible one should we add one say 40A?

best regards

laurent sosson