Out of the total installation cost of about $3/watt, equipment purchase cost is $1.70. The actual cost of a solar panel per watt is falling every year until in most places in 2021 it’s less than $1/watt.
For many homeowners, it isn’t worth the hassle of installing a complex piece of equipment like a sun-tracker when they could simple add a few solar panels to get the same impact, particularly if they only have limited roof space for mounting.