It's not expensive in all developed countries though... In the US, we pay $3/W for residential installation, but in Australia it's literally 1/10th the cost at

It's not expensive in all developed countries though... In the US, we pay $3/W for residential installation, but in Australia it's literally 1/10th the cost at $0.3/W. The $3/W is a choice that we made in our political system, by 1) keeping highly fractured and inconsistent local permitting processes rather than a more efficient higher-level rule making, 2) letting utilities exercise control over the process such that they can minimize installations (why isn't your electricity bill going down even though electricity generation is getting cheaper with the new technology? Same reason: regulatory capture of your Public Utilities Commission).