Hi Aldo,
1. For the battery storage model configurations, you specify battery costs on the System Costs page. You can specify the installation cost in $/kWh of battery capacity, $/kW of maximum discharge power, or both. The battery capacity and discharge power are from the Battery Storage page. On the System Costs page, you also specify the battery replacement cost under "Operation and Maintenance Costs" at the bottom of the page. The replacement frequency depends on the battery lifetime and battery replacements options you choose on the Battery Storage page.
2. You'll have to do research on the equipment choices for your design. You can use SAM to model different equipment choices and compare performance or economic metrics as part of your evaluation of different choices.
3. On the Electricity Rates page, the minimum charges are for situations where the electric utility company defines a minimum charge for the monthly electric bill. For example, if the minimum charge for a given month is $100, and the sum of energy charge, demand charge, and fixed charges for that month is $90, then the monthly bill would be $100.
4. I'm not sure how to make the calculation of energy required for a shower. That is outside the scope of SAM.
5. No. There is not an energy storage option for the wind power model.
6. Please follow the link to the SIREN Toolkit from the SAM weather data page for information about the toolkit:
sam.nrel.gov/weather-data.html.
Best regards,
Paul.