In an energy-efficiency project, the client will save money each month on utility and maintenance costs.  At first, monthly savings are put towards the project cost.  Once project has been paid for (the savings equal the total capital cost) the client can re-invest the savings.  

The reinvestment rate is the annual percentage yield that the client will receive from investing the savings after the project has been paid for.  

We recommend using the conservative, default value of 2%.  

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