Looks like even less than 30% - the chart in this article shows panels are only around 10% of total cost for residential, meaning further panel price declines n

Looks like even less than 30% - the chart in this article shows panels are only around 10% of total cost for residential, meaning further panel price declines now have very little effect: https://www.pv-magazine.com/2017/06/12/u-s-utility-scale-solar-falls-below-us1-per-watt-w-charts/ https://www.pv-magazine.com/2017/06/12/u-s-utility-scale-sol... As you imply, for utility scale the other costs are much lower, so falling panel costs still have a significant impact on total price.