Total Cost of going all in Renewables is Total $530– $760Billion...

Total Cost of going all in Renewables is Total $530– $760Billion (2024–2040, phased)

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What is the alternative electricity cost of renewables only for Australia if we decide to not include fossil fuels Coal & gas Include only the following mix renewable energy. Also keep in mind the extra additional costs weeks-long droughts require overbuilding due to day to day changes in weather patterns, example cyclones, droughts etc.
1) Solar cells and windmills.
2) extra transmission lines
3) Battery back up
4) Pumped hydro.


ANSWER

Required Renewable Capacity (2030–2040 Target)

Technology	Capacity Needed	Notes
Solar PV	150–200 GW	3–4x current capacity (accounting for droughts/clouds).
Wind (Onshore + Offshore)	100–150 GW	Offshore helps during calm periods.
Battery Storage	40–60 GWh	12+ hours of grid backup.
Pumped Hydro	20–30 GW	Snowy 2.0 (2.2 GW) + new projects.
Transmission	10,000+ km	New lines to connect REZs (e.g., Marinus Link).

Estimated Costs (2024 AUD)

Component	Cost (AUD Billion)	Source
Solar PV (200 GW)	$120–160B	CSIRO GenCost 2023
Wind (150 GW)	$180–240B	AEMO ISP 2024
Batteries (50 GWh)	$50–80B	BNEF Battery Price Survey 2024
Pumped Hydro (30 GW)	$60–90B	ANU Pumped Hydro Atlas
Transmission Lines	$20–40B	AEMO ISP 2024
Overbuilding (30% extra)	$100–150B	RMI Report 2023
Total	$530–760B	(2024–2040, phased)