Originally Posted by
Jantar
Onslow would be pure pumped storage, not just a hydro dam. It has very low natural inflows at around 4 cumecs, and so relies on pumped water for its fuel. It is not that the cost in the table has reduced by 25%, but that Labours estimate is 33% more than Majeed calculated in his thesis.
I fail to see where your $3m per mwh of production cost comes from. That is not in the table nor in any calculation I have seen anywhere. The construction cost would work out at $3.3m per MW. That is Construction, not production, and is certainly in line with other hydro projects. The storage construction cost is $0.50 per kw and the actual cost of the water stored would be $40 per MWh or 4 c per unit.
With an OPEX of $12 M per annum the cost of generation would be $62 per MWh or 6.2 c per unit.