Energy consumption: -Ideal candidates are facilities that are already energy efficient: i.e. tight building envelope, high

efficiency appliances, CFL lightbulbs, etc.

Roof structure and type: -Standing seam roof: only one roof penetration for

conductors, compared to multiple penetrations required for racking system on asphalt shingled applications.

-Asphalt Shingled Roof: Multiple penetrations required for racking system.

-Flat roof: panels must be mounted at an angle, requiring additional racking.

Tax liability: -In order to take advantage of federal and state tax

incentives for solar pv, one must have a tax liability. In other words, one must owe the government money.

Site-specific:

-adequate roof space for modules -Wire run from array to Inverter -adequate room next to service panel for inverter mounting

Ideal site conditions include:

-At least 5 full hours of sun on the modules. -Minimal shading from trees, nearby structures and roof-mounted hvac equipment. -Ability to face modules between 15 to 30 degrees west or east of magnetic south.

System maintenance:

-There are no moving parts associated with a solar pv system. -The system should be monitored to ensure proper performance.

Life expectancy of system: -Solar PV systems have a design life of 20-25 years-In most cases the system will

outlast the design life.