Abstract: Computer-based systems, media, and methods for sourcing, analyzing and calculating and underwriting the financing of distributed energy systems affixed to real property with the financing payments secured by a lien placed by a governmental authority. A web-based calculator tool is enabled to facilitate web searches used to collect required necessary information to create a project finance profile and to calculate and display results to property owners and to contractors or other channel partners. In some cases, the tool is further used to underwrite the project financing and displaying whether a project is preliminarily credit-approved. In further cases, the tool further enables pre-setting project finance assumptions for offering standard fixed-pricing to project applicants arranged by utility tariff, city or county or zip code subject to particular program parameters.