Hi guys, thanks for your advice. We calculated load by amps and would like to be able to run up to 400 amps at once minus a cushion for safety as needed. There is no motors unless you consider aircons as. Yes 300A without a new transformer + 100A line might be the solution to avoid the transformer. Still we would need to run some thick cables up the road, which can add up to a substantial cost I believe. We do have qualified engineers helping us with this but it's great to hear your ideas. I was unaware that PEA can supply that list of qualified contractors.