Is it cheaper to build residential rooftop solar or buy power from the grid?

The cost of building a residential rooftop solar project has dropped dramatically in the last decade. Where does it fall compared to buying electricity from the grid?

Download the full spreadsheet here by clicking on the bottom right of the embedded Excel spreadsheet.

This analysis is used in: Energy Fact; Building a commercial-scale solar project is cheaper than buying from the grid

Code: m162 FinResSolGrid math xbMath