Red tape is the biggest challenge to home solar→

Scientific American:

The technology behind solar power continues to ramp up in performance and drop in price. As it does so, the soft costs—permitting, financing, installation—are making up a bigger portion of the price tag for new projects.
The Department of Energy reported that soft costs now make up more than half the price tag of installed solar power, with residential solar bearing the largest burden of these expenses.

“We tried to save the world, but there was too much paperwork involved.”