Design should include

a site analysis
calculation of system output
percent of electrical use offset
type of solar panel chosen
number and type of inverters selected
mounting system
disconnect switches
other safety or monitoring materials, batteries, and charge controllers, if required.

Process/Skill Questions:

How many kilowatts of electricity does the average home in the local community consume, on average, per month?
What is the conversion calculation from kilowatt hours consumed and kilowatts produced?
What size solar array would be needed to power a building in the local community?
What are the three most common racking systems for solar PV?
What size inverter would be needed to handle a PV array that could power a building in the local community?
What is wind loading?
How does heat affect PV panel output?
What is a passive tracking system?
What is an active tracking system?