It varies on how much it takes to build solar farms, but it is approximately $2.00 per watt. This includes the engineering design, the site layouts, detailed interconnection drawings, and full turnkey installation of that system on your site.
With solar panels, the consumer is able to save 60% or more on electricity.
Since solar energy can only produce energy when the sun hits the panels during the day, to make sure people have energy at all times we need a way to store this energy.
One way to do this is to copy photosynthesis in plants. Use the sunlight to power electrolysis of water to generate hydrogen as a fuel.
This will power fuel cells with virtually no pollution byproducts as the hydrogen combines with oxygen again.
For this to happen, engineers will need to find new ways to perfect this chemical reaction with the development of new catalysts. If there is a way to produce catalysts that work as well as natural enzymes it will make the solar production-fuel cell storage system better for solar Economy.