ROTFL!
If a DIYer reverse connect a HV Battery and it make a big bang…
…maybe not only the installation is cooked and the parents of the DIYer have to make/redo a new child!
Have a nice day. (here it is rsining since 48 hours already)
First thing I think when seeing this topic was: below 50 V, electrical short circuit through human body is not dangerous. The drawback is that short circuit with conductive pieces are producing higher currents because batteries are in parallel instead of in series. Considering that power dissipated through your screw driver or something else is equal to I²/R, there is higher probability to start a fire. So, choose your hazard. 
BTW, HVDC is more and more common, like the new power line between France and Italy (Ligne Savoie-Piémont). 350 kV/1200 MW. Surprising considering that both countries are on the same synchronous AC network.
There is a compromise with the 96V, though, isn’t there?
Compromise is always related to local parameters. Victron is providing recommendations for system DC voltage, in relation with expected power. Right now, recommendations are limited to 48 V but, if power is increasing, it make sense to increase DC voltage to minimize costs (size of wires, switches, circuit breakers…).