Photovoltaic System Calculator

This calculator is intended to give you a very rough idea of what a PV installation will cost and what it will save you over time.

Enter the site specific information into the calculator and it will generate results to illustrate your case. To look up Sun-Hour data for your specific location, you can find a Sun-Hour table here. For autonomous capacity, meaning no help from the grid, use the minimum value. For Net-Metering applications, use the average value.

Electric Utility

Photovoltaic System

Electric Consumption (KWH/Month)

Average Full Sunlight/Day (hours)

Grid Attachment Cost ($)

PV System Peak Wattage Requirement (W)

Electricity Cost ($/KWH)

PV System cost per peak watt ($)

PV System Yearly Expense

PV System Lifetime (years)

Displaced Grid Electricity Cost ($)

PV System Cost ($)

Economic Factors

Electricity Inflation Rate (%)

Money Inflation Rate (%)

Federal Incentive (%)

Local Incentive (%)

Local Incentive ($)

Local Incentive ($/W)

Bottom Line

After Incentive Cost ($)

Simple Payback (Years)

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