# PV panel material import in HB rad library

**URL:** <https://discourse.ladybug.tools/t/pv-panel-material-import-in-hb-rad-library/23999>\
**Category:** ladybug-tools\
**Tags:** daylight, honeybee, glare\
**Created:** [February 13, 2024, 12:07pm UTC](https://discourse.ladybug.tools/t/pv-panel-material-import-in-hb-rad-library/23999 "2024-02-13T12:07:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Julioamodia89](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/julioamodia89/32/15720_2.png) [@Julioamodia89](https://discourse.ladybug.tools/u/Julioamodia89)\
**Post date:** [February 13, 2024, 12:07pm UTC](https://discourse.ladybug.tools/t/pv-panel-material-import-in-hb-rad-library/23999/1 "2024-02-13T12:07:10Z")

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Dear all,

I am trying to import this material into HB Radiance. I am having a hard time figuring out what is the correct way to do it, or if it is possible.  
Could anybody please give me a hint about how to proceed?

The material is composed by two submaterials/properties:

**1st definition**

void texfunc pucker  
6 puck\_dx puck\_dy puck\_dz pucker.cal -s 4.0  
0  
1 0.0035

**2nd definition**

pucker ashik2 sunpower\_pvcells  
4 0 1 1 .  
0  
8 0.006995137 0.008994048 0.021037648 0.029284513 0.029518141 0.030717789 100 100

Source:

> **[Sunpower E20 Solar Panel Cell](https://spectraldb.com/measurements/00111/)**
>
> Material Measurement Data

Thanks,  
Julio

---

<div class="post-metadata">

**Author:** ![AbrahamYezioro](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/abrahamyezioro/32/3_2.png) [@AbrahamYezioro](https://discourse.ladybug.tools/u/AbrahamYezioro)\
**Post date:** [February 13, 2024, 12:38pm UTC](https://discourse.ladybug.tools/t/pv-panel-material-import-in-hb-rad-library/23999/2 "2024-02-13T12:38:52Z")

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Just defined a file and copied/pasted your definitions in there. The extension of the file is “.rad”.  
[PV\_Mat\_Modifiers.rad](https://discourse.ladybug.tools/uploads/short-url/vPo37h0AVCUih9tjyaaTcrEPR5w.rad) (210 Bytes)

 ![Screenshot 2024-02-13 143525](https://discourse.ladybug.tools/uploads/default/original/3X/9/4/94075014ee3716486c7f2fc976ca31843c1b85f4.png)  
Put it in C:\Users\USER\_NAME\AppData\Roaming\ladybug\_tools\standards\modifiers folder.

If Rhino s open you need to close it and open again in order to take effect.

-A.