Part of the reason is the cheap quality panels coming out of china being taken up by the big players in the solar game. Most of the Chines panels are going to china's installations. This is why coal is dead here.

The enron's shifting form dirty oil to solar. Not because it is clean but cheap. They can replace oil coal and nuclear with solar because it cost less and is on line way faster. They have kept consumer level high so adoption is low keeping power production in the hands of the old guard. They want to sell you power not buy it from you.

I you have a grid tie system it for you is plug and play. And they work well.

Nether of the videos worked for me.