More windmills! We have lots already that are due to be replaced or refitted at prohibitive costs. Apparently, 10 years is all you can expect from these 'wonders' before replacement is necessary.

Australia’s largest ever solar power plant, AGL’s 102 megawatt Nyngan – has begun feeding power into the grid. But there’s a far more interesting solar power plant no one is talking about in Mildura.
The Nyngan plant in Western NSW now has its first 25MW of capacity, involving 350,000 solar modules made by First Solar, generating power that is exporting power to the grid. Further generation will progressively be brought online over the next three months as the remaining three sections of the plant are individually commissioned.

Ok Foxy, a book you might find interesting is "Too Much Magic" by
James Kunstler. Joe I think will also find it interesting.
It tackles the dependence we place on technological fixes.
You might get it in your local library.

Doog 350000 panels to generate a measly 25 Megawatt.
That means 28 million panels to equal one large coal fired station !
Hmm, and it only produces near its max output for four hours a day !
Does it track the sun ? then it will work for 8 hours a day.
I would presume that the project is dependant on subsidies.
However all these projects depend on something else taking up the
load when the sun goes down.
ttbn; It should be possible to refurbish for quite reasonable cost.
The gearbox might need replacing as that would be the most mechanical
part involved. The blades could be replaced with new/reconditioned
ones so it could be quite practical to refurbish.

Because you can bet on it that at intervals there will be no sun and
no wind. So a backup system that is equal in size is needed.
If batteries, it is just an absurd cost, therefore it has to be gas
coal or nuclear. What else is there ?

Dear Joe,

You know what.

I'm too tired to argue with you.
I'll leave it for now.

Dear Bazz,

How expensive would nuclear be, and what do we
do with the toxic waste?

cont'd ...

The following link may be of interest:

http://www.ga.gov.au/scientific-topics/energy/resources/australian-energy-resource-assessment

The only answer is nuclear power stations and before it is too late.
The government sold off the power infrastructure based on the cash reserves the
units held and as soon as the new owners stepped in they raped the cash out as
dividends and exorbitant salaries and now they have to increase the
cost of power exponentially to cover infrastructure updates and maintenance.
The governments have to allow the increased costs because the people have to have
power and they are powerless to do anything about it.
It's almost too late to act but getting out from under the climate change bull crap just as
Trump has done would give us a chance.