BLOG
search

The behavior of solar modules under stress

Adrienne SorensenAugust 23, 20181510

The behavior of solar modules under stress 

As solar panels manufacturers find more innovative methods to decrease costs, product design is valued by this objective. In this article, we’ll review the solar frame of the panel and how the behavior of modules under mechanical stress varies.
 

The mechanical role of the frame
 
The frame of solar panels lies in its mechanical qualities that provide a few perks. Some of these advantages are handling, storage, grounding, fixation, and resistance against mechanical load.  Two modules with the exact same frame thickness doesn’t behave the same. The behavior of each module really depends on the choices made during its design process.  
Most of the cost of a photovoltaic module lies in the cell, thus is silicon related. Within non silicon costs, the frame signals an important part. Thus, thinner aluminum frames are favored and their cost depends on the weight of metal. Decreasing the thickness of the frame influences the cost as less and is lighter to handle by the installer.  The evolution of frames is slow. Trying to locate an accurate compromise between the design and the weight of aluminum to ensure reliable mechanical properties is still a process. 


Reviewing the results 

Solar panels were chosen from various brands and frame thickness, from 31 mm to 50 mm to conduct a mechanical resistance test.  A load of 2400 Pa is equaivalent to 400 kg per panel (1,6 sqm) of snow on the module. Electrical performances is what’s at stake. When modules have to endure mechanical load, the frame is influenced the ability of the module to perform properly. In particular, when there’s a high mechanical load, which could be the case with severe climate change, the electrical properties of the module can be extremely damaged. If this should take place around the time of an actual installation, the yields would be impacted for decades.

All the modules don’t act the same under mechanical load and part of that  reason comes from the frame. The evolution of frame design  should be developed carefully to ensure reliable behavior. Although it can be overlooked,  for an installer, a bad frame is synonymous with price or time related concerns:

– Freezing inside of the frame during winter causing module breakage
– Frame breakage due to poor assembly
– Loss of yields in case of loss of electrical power
– Loss of versatility in the option of mounting system and module orientation due to clamping limitations
 
Move into the future with solar with the help of HahaSmart., Try our price checker tool and see how affordable solar really is. We can also help find qualified solar installers who can help save you money on the cost of going solar. 
Don't forget to visit our solar blog section for more handy guides and articles, about going solar.
 

Solar system price checker

Comments

Design Your Solar Home

START

12 3

Input your address to see if it is solar friendly and how much you can save with solar.

Great. Your address is perfect for solar. Solar incentive is still available. Select monthly utility cost and calculate the size of solar system you will need now.

Whoa ! Going solar is definitely a smart decision.

kw System size years Payback period Lifetime savings

No money down, 100% finance is available.

Looking for more solar news? Sign up now and we will find them for you.

Do not show this information again.