Chasis grounding of MPPT 100/50 - Yes or No?

DIY
, ,
1

Should the chassis of an MPPT 100/50 be grounded at the ground screw (A)?

The manual states the following:

Chassis grounding (only for the 30A model)
A separate ground path for the chassis ground is permitted because the chassis is isolated from the positive and the negative
terminals.

Should I read from that that on the 50A model (i.e. the MPPT 100/50) there is NO need to ground the chassis via the ground screw?

Thanks!