Monocrystalline Solar Modules Vs Polycrystalline Modules
Integrated Energy Storage has investigated various solar panel performances and have now resolved to only supply Monocrystalline product. Performance and lifespan are the two main factors that brought us to this decision. Given our long-term company goals and the future service and performance requirements of our customers, combined with the recent failings of many polycrystalline panels in the Australian conditions, Integrated Energy Storage will now only supply Monocrystalline solar modules.
- Monocrystalline cells are physically more flexible than polycrystalline cells which are physically rigid. Hence, they are less susceptible to cracking from movement over time and deterioration due to the severity of the Australian Sun.
- Monocrystalline cells are higher efficiency than polycrystalline and offer better performance in low light, and overcast weather.
We have chosen two leading Brands as our core offering. LONGI solar and Talesun. Both are Vertically Integrated Tier 1 manufacturers that offer supreme quality at affordable prices.
LONGI solar are the worlds largest producer of Monocrystalline cells and supply much of the world market.
Talesun is one of the largest solar panel manufacturers in the world, with a 28 year history in the solar industry. The company offers solar modules for a range of applications in the Australian market, a lightweight monocrystalline and a zero potential-induced degradation module.
LONGI and Talesun are both Vertically Integrated Tier 1 manufacturers that maintain their own quality assurance controls. You, the customer, take a risk when you buy from telemarketing companies selling "cheap" solar and..If they wont offer you a FREE site assessment at your home, whats the chance they will come out when you have an issue?
Did you know there are two types of Tier 1 manufacturers? Yes, very confusing. You will be interested to read this.
Tier 1 Manufacturers originally were given this ranking if:
- They were vertically integrated, growing silicone in ingots and slicing them into wafers, grading cells as A-grade , B and C-grade, through computer analyzing x-ray technology . Naturally using A-grade cells for their own use (selling the rest)
- Using mostly automated production processes to build solar panels (less human error) quality control systems - out pops a quality solar panel
- They needed to be in business for at least 5 years
- They needed be spending millions on R & D
Seems straight forward enough, but no... there is also a new version of Tier 1 manufacturer that came into effect a few years back. They don't need to follow these guidelines but still get called Tier 1! Yes that's confusing..
These are predominantly polycrystalline module manufacturers. To qualify for this recognition, all you needed to do is produce over 300megawatts of solar panels each year and it doesnt need to be vertically integrated and doesnt need to be in your own factory ... therefore, manufacturing agents could make them (like sub-contractors) and just paste the labels on the back of the solar panel for which ever solar manufacturer has hired them! The scary thing is not all have Brand controlled quality control systems or staff. Seriously why did they do that? World demand I suspect, or someone had a mate.
So, if they didn't grow the silicone themselves, where did their solar cells that they use come from? Perhaps they bought some of the B and C grade cells also? So whilst these Tier 1 panels may perform ok for 4-5 years many they can degrade rapidly even with just one poor quality cell of the 60 cells that comprise a solar panel. (Just like your torch at home, if one battery is dead it doesn't work!) I have seen complete solar arrays deteriorate and fail within 3 years. Additionally, controlling the quality of the EVA materials used (plastics) is another concern. I have seen, big name brands we have removed from roofs where the backing sheets have all deteriorated in our sunlight and weather. Consequently moisture ingresses and they completely failed, yet other vertically integrated produced panels over the same period, do not...due to better quality control and quality plastics.
You have likely seen this happen yourself around your own home. Leave something made of plastic material outside too long and it yellows go brittle and cracks.