NPV Calculator Formula
The Solar NPV calculator is based on the formula:
Where:
NPV = Net Present Value
CIns = Installation Cost
CRep = Cost to replace the inverter at year 15
i = Future value discount rate
p = lifespan of the solar panel system
G1 = Electricity price in year 1
PS = Price of electricity for self consumption
S = Self-consumption factor
PE = Price of electricity for export
ie = Electricity price inflation
d = Solar panel degradation (annual, compounded)
See solar NPV spreadsheets to learn more about solar panel NPV calculations.
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