Estimate the solar PV system area and electrical energy storage required to power a company purely by sunlight. If a solar PV system with a capacity factor of 15% can be installed for $3/Watt, and the energy storage costs are $200/kW-hr, what would be the up-front installation cost of such a system? If it lasts for 20 years and performs to its ideal specifications year round (i.e. you don't have to consider losses due to bad weather, clouds, fog etc) and interests costs for money are zero so that the present value and future value of money is equal (really an ideal world!)), how much does the electrical energy cost per kW-hr? How does this compare against conventional electrical energy costs?