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Snow loading effect of PV Modules
https://forum.pvsyst.com/viewtopic.php?f=22&t=4411
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Author:  Janani [ Mon May 13, 2019 1:57 pm ]
Post subject:  Snow loading effect of PV Modules

Hi,

I am estimating generation for a region near Himalayas in India. as the location is prone to snow fall, pl let me know how to account loss due to snow loading on PV modules.

Should it be factored in soiling?..

Pl help.

Thank you

Author:  fredericr [ Mon May 13, 2019 4:03 pm ]
Post subject:  Re: Snow loading effect of PV Modules

Yes, losses due to snow should be added to the soiling losses.

Author:  Janani [ Tue May 14, 2019 5:46 am ]
Post subject:  Re: Snow loading effect of PV Modules

ok. But it is seasonal.

Hence is there any PVsyst's recommendation on how much % loss to be considered for snow cover?

Author:  fredericr [ Tue May 14, 2019 6:15 am ]
Post subject:  Re: Snow loading effect of PV Modules

You need to apply soiling on a monthly basis. It is not unusual to have 50% snow losses for peak winter months if you are in a snowy location and if your tilt is low.
There are a few studies available online that can help you estimate snow losses but it is very location and system dependent.
We operate projects in Canada and Japan and it’s always been a challenge to model snow losses. Thankfully winter months in snowy location are not high production to start with.

Check this from NREL https://www.nrel.gov/docs/fy17osti/68705.pdf
This from DNV https://solarprofessional.com/modeling- ... o-snowfall

Author:  Janani [ Fri May 17, 2019 1:22 pm ]
Post subject:  Re: Snow loading effect of PV Modules

Noted.

Kindly request PVSyst to include snow loading effect in energy estimation with the input of snowfall pattern and snow depth.

Thank You

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