Ok Ill work it out.
To get an idea of what the whole pack will look like stacked into as close to square.
One way to look at this.
196L x (161H + 161H) x (128W + 128W)
Or rounded off for a battery box, 20cm X 33cm X 26cm
Have I got it right this time.
Actually that's quite acceptable. Over doubles my capacity for the same weight at 24kg.