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The fact that cell technologies featuring the highest efficiencies in industrial production are based on N type Cz-Si wafer is a striking demonstration of why n-type wafers are the most suitable material for high-efficiency solar cells.
Getting into more details, there are some physical reasons for the superiority of N type versus P type, the most important are:
1. due to absence of boron, there is no light induced degradation (LID) occurring in p-type Si wafers, due to boron-oxygen complexes
2. as N type Si is less sensitive to prominent metallic impurities, in general the minority carrier diffusion lengths in n-type Cz-Si are significantly higher compared to p-type Cz-Si
3. N type Si is less prone to degradation during high temperature processes such as B-diffusion.
1. For wholesalers
Q: Are you a trading company or factory?
A: We are a professional import and export company mostly at the moment, but with some manufacturing facilities and resources.
Q: How long is your delivery time?
A: Generally, it is 5-10 days if the goods are in stock, or it is 15-20 days if the goods are not in stock. It really depends on the quantity ordered.
Q: Do you provide sample? Is it free or the buyer has to pay?
A: Yes, we could offer sample for parts and smaller components, which can be free of charge. The freight cost should be on buyer's account.
Q: What is your payment term?
A: Payment<=5000USD, 100% in advance. Payment>=5000USD, 30% T/T in advance, the balance before shipment.
2. For end users
Q: How do solar photovoltaic (PV) panels work?
A: Solar panels absorb the sun's energy throughout the day and convert it into direct current (DC) electricity. Most homes and businesses run on alternating current (AC) electricity, so the DC electricity is then passed through an inverter to convert it to usable AC electricity. At that point, you either use the electricity in your house or send it back to the electric grid.
Q: Will I still receive an electric bill if I have solar panels?
Unless your solar energy system includes battery storage and you are fully off the grid, you will still receive a bill from your utility. However, you can dramatically reduce your bill, or even cut the amount you owe to $0, with a solar panel system that matches your energy use.
Q: Is my roof suitable for solar panels?
A: Sun-facing roofs with little to no shade and enough space to fit a solar panel system are idea for stalling solar. However, in many cases, there are workarounds if your home doesn't have the ideal solar roof. Please contact us to learn more about all of your options; all installation offers are based on images of your actual roof.
Q: What happens if I sell my solar house?
A: If you own your solar energy system, your solar house will sell at a premium and studies have shown that solar increase property values. However, if you lease your system, that is not the case. You will need to either buy out your lease before you sell your home, or work with your leasing company to transfer the lease agreement to the home's new owner.
If you have more questions, please feel free to contact us directly.
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