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  4. APPENDIX
  5. LIST OF OPTIMIZER INPUT FIELDS AND DEFAULT VALUES

LIST OF OPTIMIZER INPUT FIELDS AND DEFAULT VALUES

Input Field Unit Demo Inputs Default
Electrical Inputs
Is the Point of Common Coupling (PCC) coincident with the Point of Delivery (POD)? None 1 (Yes)
Gen-Tie Line Length Mi 0
Max AC Power at Point of Delivery (POD) MW 100
Interconnection Voltage kV 34.5
Maximum Combiner Box Size # Strings 32
Non-Ohmic DC Losses % 0
Pre-parallel Strings? None No
Soil Thermal Resistivity °C-cm/W 90
Module 1 Selection (Add up to 5 Modules)
Manufacturer None
Model None
Width m
Length m
Energy Degradation %/Year
Price $/W
Inverter 1 Selection (Add up to 5 Inverters)
Manufacturer None
Model None
Width m
Length m
Max DC Inputs None
Max DC Fuse Size A 400
Number of Inverters per Station None 1
Price (Inverter Only) $/Unit
Structural and Geotechical Inputs – Detailed Mode
Rack Type None 4×4 Landscape Fixed Tilt
Wind Exposure Category None C
Basic Wind Speed mph 115
Ground Snow Load Pg 10
Racking Ground Clearance ft 2
Seismic Coefficient – Sds g 1.5
Ultimate Side Friction Resistance psf 500
Factor of Safety for Side Friction ASD 1.5
Ultimate End Bearing Capacity lbs 1500
Factor of Safety for End Bearing ASD 3
Unconfined Compressive Strength qu 1000
Minimum Required Pile Embedment ft 0
Top Soil to Neglect in 0
Pile Equipment Rental Cost $/Pile 15
Pile Labor Cost $/Pile 15
Rack Install Labor Cost $/W 0.05
Price of Structural Steel $/lb 0.52
Structural and Geotechical Inputs – Override Mode
Structure Type – Generic Fixed Tilt or Generic Single Axis Tracker None Fixed Tilt
Number of Modules Per Rack (Up) None 2
Number of Modules Per Rack (Across) None 4
Portrait or Landscape Orientation None 1 (Portrait)
Single-Axis Rotation Limit (tracker Only) Degrees 45
Shading Mode (Tracker Only) None Backtracking
Length of Piles Including Above Ground Portion (ft) ft 10
Linear Weight of Piles (lb/ft) lb/ft 7
Piles Per Rack None 2
Pile Equipment Rental Cost $/Pile 15
Pile Labor Cost $/Pile 15
Rack Install Labor Cost $/W 0.05
Price of Structural Steel $/lb 0.52
Racking Material Cost $/W DC 0.1
Financial Inputs
PPA Price $/kWh 0.15
PPA Escalation %/yr 1
PPA Escalation Years yrs 20
Project Lifespan yrs 25
Energy Availability % 100
Energy Degradation % 0.5
Soiling Losses – Average Annual % 5
Soiling Losses – January % 5
Soiling Losses – February % 5
Soiling Losses – March % 5
Soiling Losses – April % 5
Soiling Losses – May % 5
Soiling Losses – June % 5
Soiling Losses – July % 5
Soiling Losses – August % 5
Soiling Losses – September % 5
Soiling Losses – October % 5
Soiling Losses – November % 5
Soiling Losses – December % 5
Insurance Rate % 0.5
Insurance Rate Escalation %/yr -6
Inflation Rate % 2.5
Salvage Percentage % 0
Real Discount Rate % 8.2
Is Land Owned or Leased? None 2 (Leased)
Land Purchase Cost $ 0
Property Tax Rate % 0
Annual Land Lease Cost $/acre/year 500
Annual Land Lease Escalation Rate % % 0
Land and Site Prep Costs $/acre 2000
Interconnection Facilities and Gen Tie Costs $/kWAC 30
Design, Engineering, Permitting Costs $/kWAC 50
Construction Labor Rate $/hr 60
Electrical Labor Rate $/hr 75
Contractor Management & Margins % 15
Other Development Costs (AC) $/kWAC 0
Other Development Costs (Area) $/acre 0
Other Development Costs (DC) $/kWDC 0
Other Development Costs (Fixed) $ 0
Average Material Shipping Cost % 4
Federal Investment Tax Credit (ITC) % 30
State Investment Tax Credit (SITC) % 0
Federal Production Based Incentive $/kWh 0
State Production Based Incentive $/kWh 0
Man Mins per kW Civil Works man-min/kWDC 30
Man Mins per kW Mobilization & Staging man-min/kWDC 10
Man Mins per kW Panel Install man-min/kWDC 27
Man Mins per kW DC Electricals Install man-min/kWDC 25
Man Mins per kW AC Electricals & Inverter Install man-min/kWAC 13
Man Mins per ft Trenchwork man-min/ft 4
Loan Fraction % 50
Loan Term yrs 20
Loan Rate % 7
O&M Cost/Capacity (Excludes Land Lease & Insurance Costs) $/yr/kWDC 15
O&M Escalation %/yr 0
Federal Income Tax % 35
State Income Tax % 7
Sales Tax % 5
Depreciation Type (Federal) None 2 (MACRS)
Depreciation Type (State) None 2 (MACRS)
Federal Depreciation Straight Line Years yrs 7
State Depreciation Straight Line Years yrs 7
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