The coal industry employs 40k,and they are expecting that to increase by 5percent per year until 2025.
Ok after doing some research ,Australia does not manufacture solar panels in fact there is only 1 that does,but all it's components are made overseas ,and assembled here.
The profit margin of manufacturing solar panels here is very small ,and the better profit margin made is by installing them ,which you have to be a trades person .
Solar panels have warranties of 20/25 years,inverters 10 years ,so once installed they need little to no maintenance.
So to manufacture them here would cost more for a short term gain ,we can't compete with overseas slave workers .
Here is a story about the rise and fall of solar panels manufacturing in Australia.
Twenty years ago, Australia appeared set to be a global player in the solar panel manufacturing industry. Today, with panels in high demand, we hardly make any of them. Here's how we lost our head start.
www.abc.net.au
Ok you used Spain as a example ,but they still have systems for constant power Nuclear/combined cycle /Hydro//Coal/ so they have over 50 percent of there general power being from a constant power source.
Also you have to take into account that Spain is 15 times smaller than Australia.
The Spanish grid was mainly powered by wind and nuclear power plants in 2023.
www.statista.com
I have heard people mentioning battery storage,the one built in Victoria ,has the capacity to power 1.5 million homes for 30 minutes ,Melbourne has about 3-4 million people,Victoria has roughly about 6.5 million people ,so you would need to build quite a lot of battery storage facilities to provide constant power .
Batteries are good for short term power/long term no.
Ok here's a couple of sites of the positive and negative of solar panels .
Environmental scientists and solar industry leaders are raising the red flag about used solar panels, which contain toxic heavy metals and are considered hazardous waste. With recycling expensive, most solar panels end up in landfills. Will they be exported to poor nations?
www.forbes.com
An in-depth look at the environmental upsides and downsides of solar panels, including environmental impacts during the manufacturing and lifetime of the system
kubyenergy.ca
Like l have said to do it properly it has to be gradual ,lm not against renewables ,but to have it done in a time frame some are suggesting is ridiculous .
I could add so much more ,but it has already become too long winded.
Go the Tiges.