[35mm]

In the US a large part of what you’re paying for is the sales and marketing cost.

Prices in the UK & Europe are lot lower per watt.

[swiftcoder]

Like, drastically lower. You can buy a 450 watt panel at a retail outlet for less than $200.

For example, https://www.leroymerlin.es/fp/88110787/panel-solar-risen-445...

[ncmncm]

Effectively, US solar panel cost is scaled by import duties.