Summary: With the deepening of the concept of energy saving and emission reduction, photovoltaic power generation has developed rapidly in recent years. Today, many ordinary people have installed photovoltaic solar power generation in their homes. However, some users who are considering installation do not know how photovoltaic power generation is charged, how much photovoltaic power generation costs per square meter, or whether to install monocrystalline photovoltaic power generation panels or polycrystalline photovoltaic energy production panels. The editor below will answer these questions. 1. How much does photovoltaic power production cost per square meter?
The price of photovoltaic solar cell modules is usually based on power (watts) rather than square meters of area. The current market price of a setfull photovoltaic power generation is about 8 yuan/W. The power of each photovoltaic power generation module commonly used in China is 270 W. It can be calculated that the price of each module is 270*8 = 2160. yuan.
General situation: The installation area of 3KW system is about 22_, 4KW system is about 30_, 5KW system is about 40_, 6KW system is about 50_ and 1kw10 square meters.
2. Are monocrystalline or polycrystalline photovoltaic solar panels better?
Photovoltaic solar modules currently on the market can be roughly divided into three categories: monocrystalline silicon modules and polycrystalline silicon modules. and amorphous silicon modules (thin film modules).
1. Monocrystalline silicon components
The current photoelectric conversion efficiency of monocrystalline silicon solar cells is enaround 15%, the highest reaching 24%. It has the highest photoelectric conversion efficiency, but its production cost is so high that it cannot be widely and commonly used in large quantities. Since monocrystalline silicon is typically encapsulated in tempered glass and waterproof resin, it is strong and durable, with a lifespan of typically up to 15 years and up to 25 years. It is currently the dominant trend in the market.
2. Polycrystalline Silicon Components
The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency of polycrystalline silicon solar cells is much lower. . About 12%. In terms of production cost, it is cheaper than monocrystalline silicon solar cells. The material is easy to manufacture, saves energyogy and the overall production cost is low, so it has been widely developed. In addition, the lifespan of polycrystalline silicon solar cells is shorter than that of monocrystalline silicon solar cells. In terms of performance-price ratio, monocrystalline silicon solar cells are slightly better.
3. Amorphous Silicon Components (Thin Film Components)
Even if scrap silicon wafers are used, silicon wafers are not necessarily inexpensive given their efficiency levels. Thin-film solar cells are cheaper than traditional solar panels, but are also less efficient, with photovoltaic conversion rates between 20% and 30%. Compared with monocrystalline silicon components and polycrystalline silicon components, they are basically 2 to 3 generations behind.
For users, it doesn't matter whetherthey choose monocrystalline, polycrystalline or thin film modules, the most important thing is to choose the overall income! Product quality is the most important factor in determining a power plant's revenue. If your product is of good quality, you will earn more. Regardless of the type of component it is, the same principle applies.
1 kilowatt hour of electricity is equal to 1,000 watt hours (WH), and 700 kilowatt hours of electricity is 700,000 WH.
Based on 5 hours of sunshine per day, the battery panel will generate 700,000 WH of electricity per day, and the required power of the battery panel is:
700,000/5=140,000. watts, if energy production is also included. If the efficiency (based on 90%) is actually 140,000/0.9 = 155,556 W.
If a battery panel is 300 W, 155,556/300 = 519 battery panels are required.
The surface area of a battery panele of 300 W is approximately 2 square meters.
519 battery panels are approximately 1,040 square meters.
Thus, to generate 700 kilowatt hours of electricity per day, the spread of battery panels requires an area of more than 1,000 square meters.
If there is less sunlight, the panel will have greater power and take up more space.