how much money – Affordable Solar Power, Creating Renewable Energy with Solar Panels

If there are solar energy panels, is there anything to save water?

I know there are solar energy panels and wind turbines but is there anything for water? Also, how much money would you save a year if you installed a solar panel and wind turbine? No rude comments.

How much money would it cost to have solar panels installed in an entire city?

I have to write a bill in class and I want to know how much money it would cost for a city to run on wind and solar panels. It doesn’t have to be a specific amount. . .