The arguments you provide for the panels I quoted being a higher price in Switzerland do not change when applied to Australia. We also have transport costs, trader margins, exchange rates etc.
What I suspect you will find, if you investigate, is that your local producers in Europe are protected from too much competition. You will likely find that high import tarrifs are in place, and possibly that other incentives are provided to local producers.
To give you an example (not solar related) of international price manipulation, at one point I owned an identical motor vehicle in the UK and in Australia (actually they were different colours, but other than that they were the same). Both vehicles were made in Europe, at the same factory. On a straight exchange rate, and talking about the price of the vehicle including all taxes etc. on the same day, the vehicle was about 15% cheaper in Australia. That is not a typo, after exporting the vehicle and shipping it halfway around the world, it cost 15% LESS in Australia.
I was also (when younger and fitter!) a keen cyclist. I wanted some Amercian parts for a mountain bike, and as I went to the USA every few weeks I decided to get them over there. I discovered that they were actually cheaper to buy in Europe than in the USA (actually within a few km of where they were made).
The reason? Market protection. The USA has (had?) large import tarriffs on Japanese products, so their local producers could increase prices to match. When they were exported to Europe, they had to compete and so the price was lower. Australia, on the other hand, has no significant punitive tarriffs on imported vehicles, so the European car I bought had to compete directly with the Japanese vehicles and was therefore less expensive than it was in Europe.
Austalia has no market protection of any significance, and therefore everything has to compete. Unfortunately, due to high labour costs, legal requirements, unions, work ethics etc., this is very hard to do. The problem is not limited to solar panels, by the way. There is very little real production of anything in Australia.......
I genuinely wish you luck, by the way, if you are trying to set up some solar panel production in Australia, because I think it would be a great thing to do. But at a time when factories are closing because they cannot compete with imports, and several manufacturers of all kinds of different products have closed Australian factories and open factories in China (and then imported the product in to Australia because it's more profitable), it seems like a hard road!