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Nameplate Capacity (DC)

The maximum potential power of the array, defined as the total system nameplate power capacity in DC kilowatts (kW).


Plant Capacity (AC)

The maximum potential power of the plant, defined as the total system nameplate power capacity in AC kilowatts (kW).



The total energy generated during the simulation, in AC MWh or GWh


Performance Ratio

Performance Ratio (PR) shows the percentage of total potential energy for the array that is converted to AC energy.


Net System Yield

The specific energy – total simulation energy generation divided by the system DC nameplate power.


Net Capacity Factor

The net capacity factor of a power plant is the ratio of its actual output over a period of time, to its potential output if it were possible for it to operate at full nameplate capacity continuously over the same period of time.


System DC Output

The total energy output of the DC system, accounting for all wire resistive losses.


System AC Output

The total AC energy output from the inverters, taking into account inverter performance losses.


Levelized Cost of Electricity

Levelized Energy Cost (LEC), is the net present value of the unit-cost of electricity over the lifetime of a solar power plant. It is often taken as a proxy for the price that the solar plant must receive in a market to break even over its lifetime.


Internal Rate of Return

Internal rate of return is the discount rate that makes the net present value of all cash flows (both positive and negative) from a solar plant equal to zero.


Plant Net Present Value

Net present value (NPV) is defined as the sum of the present values (PVs) of incoming and outgoing cash flows over the lifetime of the solar plant.

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