1.Click on the “Economics” tab, and enter the installed cost, energy credit (if applicable), and loan information (if applicable).
2.Click on the “Op Cost Summary” tab, and select the systems to compare by clicking the check box next to “Compare” for each of the systems to compare. You may select up to two comparison systems. Only the reference system and the comparison systems will be show in the graphs.
3.The calculations will show a simple cash payback in years (see screen shot below – “Op Cost Summary”). The annual and monthly loan payments (if applicable) are shown in the “Economics” tab (screen show above). In the example shown in the above screen, the annual loan payment for geothermal is $2161 more per year than the propane system. The screen below shows that the operating cost savings are $2189 per year for geothermal vs. propane.
Payment Analysis
