Optimization Results
After you click Next and the calculation is complete, HOMER will display the results in table format. If you have included a sensitivity, double-click to view all the feasible simulations that were run for the selected sensitivity case to open the Optimization Results table.
The highest net present value simulation for that specific sensitivity is displayed in the table and includes the following metrics.
- Configuration and sizing
- Revenue
- Cost
- Project economics
- Compare Economics
Configuration and sizing metrics
| PV Solar (MW) | Energy Storage | Converter | Solar Converter | Storage Converter |
|---|---|---|---|---|
| total installed DC size | total installed MW/MWh size | total capacity in MW | size in MW or size relative to the solar total installed size, also known as PV to Converter Ratio | size in MW, relative to the energy storage capacity. This is analagous to the C-rate, which is the storage power/storage energy capacity. The units for C-rate are 1/hour |
Revenue
The Optimization Results table includes a Revenue section that will display the revenue associated with the selected system. Depending on the Application or selected Energy markets, The revenue may include:
- one or more selected energy markets
- the capacity and energy revenue from a capacity market,
- and the revenue from a time of delivery power purchase agreement.
Cost
The Optimization Results table includes a Cost section that displays the capital and operating expenses for the selected simulation.
- Capital expenses in year 0
- Operating expenses, annualized
| NPV (Net Present Value) | IRR Internal rate of return (%) | Payback Time |
|---|---|---|
| The present value of all costs of installing and operating the system over the project lifetime in ($) | The discounting rate that makes the Net Present Value equal to zero (%) | The simple payback time in years that it takes to recuperate the capital expenses from year 0 |
Compare Economics
In the Detailed Results, the compare economics table compares financials between a base case and the proposed system. By default, HOMER will use zero cash flow as a base case. To select a different scenario as the base case, uncheck the default “use zero cash flow as base case” and use the “Select base case” button. This feature enables graphs and tables for analysis of both scenarios and the difference between scenarios. Annual and cumulative toggles present an Annual Cash Flow Chart and a Cumulative Cash Flow Chart, respectively.