Gensizer Load Calculation Tool

“Size Your Generator with Precision.”

GenSizer® is a professional generator load-calculation tool designed to help determine the correct generator size for residential applications. The system calculates electrical loads in accordance with NEC guidelines and produces professional reports that can be submitted for permit applications or shared with clients. With easy appliance input, whole-house calculations, and downloadable PDF reports, GenSizer helps contractors and homeowners confidently select the right backup power solution.