10kw are stacked on site on a castor assembly and have six single phase 16Amp connections. 20kw are a single unit with integrated castors and have three single phase 32Amp connections. Both can be directly connected to customer supplies or using our power distribution, giving options as to the final connection. 10kw can be stacked three high and a 10kw can be mounted on top of a 20kw; creating 30kw stacks (bracing must be installed).