Page 177 - Alternative Energy Systems in Building Design

ECONOMICS OF SOLAR POWER SYSTEMS 153

■ PPA yearly escalation cost as a percentage of the initial energy rate
■ Net present value over 25 years
■ Proposed cost-reduction measures
■ Net present value of reduction measures
■ Annual inflation rate
■ Projected annual electricity cost escalation
■ First-year avoided energy cost savings
■ Total life-cycle energy saved in kilowatthours
■ Total life-cycle energy PPA payment
■ Cost of PPA buyout at the end of life cycle
■ PPA expenses
■ Total life-cycle pretax savings
■ Total project completion time in months
■ Customer training
■ Insurance rating

Technical matters of interest
■ PV module manufacturer and type
■ PV module technology
■ PV module efficiency rating
■ PV module dc watts
■ PV module PTC watts as listed under CEC equipment and product qualification
listing
■ Total PV module count
■ Percent yearly solar power output degradation
■ PV module warrantee in years after formal test acceptance and commissioning
■ Inverter make and model as listed under CEC equipment and product qualification
■ Inverter kilowatt rating
■ Number of inverters used
■ Inverter performance efficiency
■ Inverter basic and extended warrantees
■ Solar power–tracking system (if used)
■ Tracking-system tilt angle in degrees east and west
■ Number of solar power–tracker assemblies
■ Kilowatts of PV modules per tracker
■ Ground or pedestal area requirement per 100 kW of tracker (For large solar-
powered farms, tracker footprint must be accounted for in acres per megawatt of
land required.)
■ Tracker or support-pedestal ground-penetration requirements
■ Tracker above-ground footing height
■ Tracker below-ground footing height
■ Wind shear withstand capability in miles per hour
■ Environmental impact during and after system installation (if applicable)
■ Lightning-protection scheme