1. A business method for financing renewable energy systems, comprising: offering a loan to a homeowner in which the payments by the homeowner are at least in-part tax deductible; offering a lease to the homeowner for the installation and use of a renewable energy system; and arranging for a deposit of cash proceeds from said home loan into a trust held by the equivalent of an escrow agent for the single purpose of paying lease payments for said lease as each payment becomes due; wherein, the proceeds from said home loan are effectively used to defease the debt represented by the future payment obligations of said lease.