(I would genuinely like an explanation for why it’s so much more expensive in the US. Australia is not cheap for basically anything - high materials and labor cost comparatively. I don’t understand how solar in the US costs so much more. )
Since Trump’s first term, the US has had 25% tariffs on solar panels from China and a few other countries, which certainly wouldn’t be helping.
That said, the Australia price seems particularly cheap; is that before grants and things? In Ireland, say, it’s typically 1.5-2eur/W before grant (grant is .7eur/W up to 2kW, .2eur/W up to 4kW, capped at 1800).