Am I the only one who was still wondering what a 'zero energy ready home' is after reading the entire article? So I followed a link, that led me to this definit

Am I the only one who was still wondering what a 'zero energy ready home' is after reading the entire article? So I followed a link, that led me to this definition: > A DOE Zero Energy Ready Home is a high-performance home that is so energy efficient that a renewable energy system could offset most or all the home's annual energy use And now I still don't know. What is a 'high-performance home'? And what exactly is the criterium to decide if 'a renewable energy system could offset most or all the home's annual energy use'?