Good grief
,
The amount of energy required to run a hydroxide plant, given the Nemaska data, would be 58Mw X 24hrs = 1,392Mwh of power per DAY.
The problem with both solar and wind is intermittency, there will be days when both are low.
Please put up some capital cost numbers for a renewable system for a hydroxide plant that uses a constant 1,392Mwh of electricity per day. I will quite confidently state that a billion dollars (US) will not allow you to have just a renewable system based on wind, solar and batteries for that amount of energy.
The same $US1B spent on a large upgrade of Mpiana, to a couple of hundred Megawatts capacity makes far more sense to me!!