BenDL

I agree, equipment earthing (or grounding, same thing different words) makes sense & is straightforward.
 
System grounding is about whether to earth one pole of a battery to an earth conductor or not.
As far as standby battery installations are concerned I prefer not to earth a pole neither on PV side or on battery side.
 
If you were to earth one pole, you are effectively creating a "first earth fault" which is fine. (nothing happens as there is no short-circuit return path created to the other pole.)
Problem arises if you accidentaly create the "second earth fault" i.e. when you accidentally earth the other pole.
If you install earthing protection then you may sometimes require one pole to be earthed.
 
There is nothing to be gained by earthing one pole of a DC system other than if you wish to use the earth/ground as a current return path.
 
Cars work that way: you attach the negative pole to the body of the car. (some older cars use the positive pole)
But in that case it is about saving conductors as you use the metal shell of a car as the negative conductor.

This looks like a seriously good piece of kit if it all works & is reliable.
MMPT built in, on-grid, off-grid.
 
You'll need what, at least 5 x 24V panels in series to get to the minimum voltage for operation?
But I would imagine that 10-15 panels would be the norm?
 
Any idea on the price point?
 
Ben

Would be interesting to see if you will get through a couple of cloudy days on that battery capacity?
I would think not, especially if the batteries start ageing.