LBNL Report Number
Solar photovoltaic (PV) installations on some US homes still receive no value during an appraisal because comparable home sales are lacking. This first-of-its-kind study uses appraisal methods to evaluate sale price premiums for owned PV systems on single-unit detached houses across six states that were also evaluated in a large statistical study. The results provide strong, appraisal-based evidence of PV premiums in all the states studied, and the results support use of cost- and income-based PV premium estimates when paired sales analysis is impossible. The appraised premiums agree with statistical modeling results, which bolsters the suitability of both approaches for estimating PV home premiums.