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# How we can assign the tilt of PV array in EnergyPlus?

In EnergyPlus the PV assign to flat surfaces. How we can assign the tilt for PV arrays?

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## Comments

2

you meant "tilt", not "title"?

( 2016-07-20 13:56:08 -0600 )edit

## 3 Answers

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As user @Ricardo GAllegos suggested, you need to create the 'shading:building' or 'shading:site' object. More specifically, according to 'Input Output reference guide pp.334 E+ 8.5'),

Shading:Site, PV-roof-mounted-surface, !-Name Your angle here, !Azimuth Your angle here, !-Tilt Your coordinate here, !- Starting X coordinate Your coordinate here, !- Starting Y coordinate Your coordinate here, !- Starting Z coordinate number, !-Length number, !-Height

then connect that surface to the photovoltaic Generator:Photovoltaic, PV:ZN_1_FLR_1_SEC_1_Ceiling, !- Name PV-roof-mounted-surface, !- Surface Name PhotovoltaicPerformance:Simple, !- Photovoltaic Performance Object Type 20percentEffPVhalfArea, !- Module Performance Name Decoupled, !- Heat Transfer Integration Mode 1.0, !- Number of Series Strings in Parallel {dimensionless} 1.0; !- Number of Modules in Series {dimensionless}

Look up the ShopWithPVandBattery.idf example

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## Comments

Thank you Alex Vlachokostas for your response. I was able to do it, following your solutions and it worked great for me. One other thing. Could you tell me what is the difference between Total Source Energy and Net Source Energy in the result. Because when I put PV systems they are different. Tanks a lot

( 2016-07-21 21:34:47 -0600 )edit

@Noosha, A tentative thought would be: Total Source Energy is always positive and indicates the amount of energy produced by your PV system. However, Net Source Energy has positive and negative values. Positive values indicate electricity fed to the building energy systems by the PVs and negative values indicate surplus electricity that is fed back to the grid. (Check your results and make sure that the Net Source Energy output has both positive and negative values.)

( 2016-07-22 10:29:26 -0600 )edit

You need to create a titled surface in "shading: building" and link this surface in " generator:photovoltaic "

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Thank you for your reply. But, I already link the roof surfaces to the " generator:photovoltaic ". Do you have any example file that I can find how define the shading building and link it to the photovoltaic. Many thanks

( 2016-07-21 08:40:46 -0600 )edit

Thank you for your reply. But, I already link the roof surfaces to the " generator:photovoltaic ". Do you have any example file that I can find how define the shading building and link it to the photovoltaic. Many thanks

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## Comments

2

This is not an answer, please use the "add a comment" button instead

( 2016-07-21 06:14:57 -0600 )edit

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Asked: 2016-07-19 19:34:25 -0600

Seen: 526 times

Last updated: Sep 08 '16