Energy Experts
- All users
- Gordon Traill
- Mike Mackmurdie
- Linn Raffety
- Tim Pullen
- Good Energy team
- John Martin
- Matthew Rhodes
- John Barker-Brown
- Rick Beament
- Barry Nutley
- Chris Rudge
- Gabriel Wondrausch
- Paul Hutchens
- Graham Eastwick
Other Contributors
Cathy Debenham Gilly JonesArchive
Posting rulesRecent Comments
- Hi I'd recommend that you measure the wind before you install, rat…
comment by Cathy Debenham
- Hmm - interesting. Some of the energy companies seem able to pay, and other…
comment by Cathy Debenham
- Hi As sashton says, you won't use all the electricity you generate in th…
comment by Cathy Debenham
Tag Cloud
YouGen Blog
How to deal with snow on solar PV modules
Posted by Chris Rudge on 7 January 2010 at 11:36 am
This past weeks little deluge of snow may have provided a nice seasonal blanket of white over your solar PV modules. While the glass in most modules has self cleaning properties, the adhesion of snow means it will cover the modules until the temperature rises. In the case of a ground mounted system, you can simply clean them off yourself.
Light is restricted through the snow, so output will be down, but you may be pleasantly surprised to see that on a sunny day with a covering of snow, the output is quite good. This is because the module temperature is really low, which improves efficiency, plus snow still transmits diffused light. Only when any layer of snow gets quite thick, will the output start to drop off dramatically.
Photo by Mike Weston
About the author: Chris Rudge is a qualified electrician who specialises in renewable energy.
Click here to ask an Energy Expert a question, and sign up to RSS feeds, to make sure you don't miss the answer.
Comments
2 comments - read them below or add one
Yes, if the modules are within easy safe reach, then cleaning off the snow is far better. However, dont risk your life clambering onto a roof!
Recently built roofs should be designed to take a loading of at least 100kgs per square metre plus snow loading. Slates weigh in at 25kg a sq metre, and Concrete tiles can be up to 75kgs a sq mtr. A PV array will be around 12 -14 Kg sqmtr maximum.
ePower-SolarComment left on: 7 January 2010 at 12:29 pm
I would always recommend to wipe the snow of the solarpanels. This is simply due to the decrease in efficiency and also the additional weight load it might imply on the mounting or suporting structure. Imagine your whole roof is covered with solar (adding about 14 kg per sqm) and than you add another 10 kg for 1m of wet snow. Thats distributed over a surface area of 120 sqm is quite some weight.
Regarding the temperature you are 100% right. This is why I always recommend customers to not overlook the temperature coefficient when buying a 12V-Solarmodul or any other solar panel.
Leave a comment
You must log in to make a comment. If you haven't already registered, please sign up as a company or an individual, then come back and have your say.
Quick Find
Advanced Find
Promote your business
Make it easy for customers to find you (and recommend your work). It’s free!
Add your company
Chris Rudge from Chris Rudge Renewable PowerComment left on: 7 January 2010 at 2:04 pm