The introduction of the solar lease financing model and third-party system ownership has rapidly and fundamentally transformed the residential solar market in the US. One could argue that the advent of high-voltage string inverters in the US market in 2001 was the last transformative event of this magnitude. The solar lease is a once-ina- decade industry-changing product that has created vast opportunities for some integration firms, and competitive challenges and disadvantages for others. Examining the evolution of the residential solar lease, its current status, and likely future developments can assist integrators in navigating these often complex and quickly evolving system-financing mechanisms.
