Given the low number of customer sales uptake records for energy efficiency and renewable energy (EERE) loan products, traditional methods of demand or market analysis are not possible for emerging residential, commercial and industrial EERE loan sectors. In this paper we ask, given limited historic market data for EERE loans, how can cities, counties, banks and states assess potential markets for EERE loan uptake? To answer this question, we develop a new methodology for assessing potential residential demand for EERE financing products, and use the CharlestonSAVES(TM) program to demonstrate how theTraffic Light Demand Rating System market analysis methodology works.