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HOMER Pro 3.9

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Photovoltaic (PV) Library

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You can view and specify the properties of Photovoltaic (PV) panels in the Photovoltaic Library under the Components Library. You can create a new panel by copying an existing panel and changing the specifications.

General Parameters




A unique name used to identify this type of PV.


A short, distinctive name to identify this PV in the schematic and results. There is no specific limit on the abbreviation length, but long abbreviated names do not fit well on the schematic or results.


An optional field used to specify the manufacturer of the PV.


An optional field to provide text for a web link for the PV.


The actual web address of the link defined in the "Website" input.


Used if "Weight minimization" mode is selected.


An optional field for reference.


An optional field used to specify additional specifications, manufacturer contact information, or anything noteworthy.

Electrical bus

The type of PV output current (alternating current or direct current).

Concentrating PV

Check the box if this component is a concentrating PV.

DNI rating condition

The irradiance at which concentrating PV panel produces its rated output. This input applies to concentrating PV only. A typical value is 850 W/m2 (0.85 kW/m2).

Lifetime (yr)

The period of time, in years, before the PV must be replaced, and the replacement cost is incurred.

Derating factor

A scaling factor applied to the PV array power output to account for reduced output in real-world operating conditions compared to operating conditions at which the array was rated. A derating factor of 80% means that the panel produces 20% less power than the nominal specification.


The Converter tab contains inputs to specify the dedicated inverter (for AC panels) or maximum power point tracker (for DC panels). The inputs are similar to those for the Inverter/MPPT for the PV page in the Design, and are described in that help section.


You can input or download a Temperature Resource and HOMER calculates the PV cell temperature. You can specify parameters under the Temperature tab of the PV so HOMER can account for temperature effects on PV efficiency when calculating the PV array output. You can define the default values for a PV module temperature effects here and change them once the panel is added to a HOMER model. See the temperature effects inputs for PV in the design view section of the help.


The Defaults tab contains several inputs specific to the PV installation. You can set the default values here and modify them when you add the PV to a model. For an explanation of these inputs, refer to the Advanced Inputs section of the PV design menu help article.

Note: To the right of each numerical input is a sensitivity button (shots_sensitivity-button) that allows you to do a sensitivity analysis on that variable. For more information, see Why Would I Do a Sensitivity Analysis?