I installed 4.6 kW of solar in 2017 for $20k. I got bids from 3 different companies and they ranged from $4.40/watt to $5.60/watt. All this talk of $1/watt is

I installed 4.6 kW of solar in 2017 for $20k. I got bids from 3 different companies and they ranged from $4.40/watt to $5.60/watt. All this talk of $1/watt is blowing my mind.