The number of kilowatts required for solar photovoltaic power generation in an ordinary household generally depends on the roof area or electricity consumption of the household. Take the commonly used 250W card as an example. The map measures approximately 1.6 square meters. It is generally calculated as 100 W per square meter. For example, 100 square meters can probably install an installed capacity of 10 kW.
The concepts and characteristics of solar photovoltaic power generation are as follows:
1. Solar photovoltaic power generation is a process that uses the photovoltaic effect to convert solar energy into electrical energy. is an efficient and straightforward process for human beings. A method of using solar energy. It hasn't been long since the first solar cells were manufactured in the 1950s, and today solar cells are manufactured and installedare on a large scale. Solar cell technology is still in a period of rapid development.
2. Since it is a conversion process, it involves the evaluation of the conversion process. We generally use the photoelectric conversion efficiency of solar cells to evaluate this conversion process, which is the ratio of electrical energy to incoming light energy. The international standard measurement method (there are other measurement standards for ground and space batteries) is to measure the power output of a solar cell per unit area under AM1 lighting conditions. 5, and its value is equal to the conversion efficiency. .
3. The highest level currently in the lab is over 42%. The factory's production line level is around 20%, and it is estimated that the production level will be significantly improved in the second half of the year.
4. Taking the common polycrystalline silicon solar cell module as an example, the size is about 1.6 meters x 0.9 meters. If the rated power is 260W, it means the irradiation power density is 1000W/m2. and when its spectral distribution is within the standard error range specified by AM1.5, the ambient temperature is 25 degrees Celsius and its output power is 260W.
5. In the actual use environment, its maximum output power will be affected by factors such as lighting conditions, temperature, wind speed, installation conditions, etc. Generally, the maximum power will not exceed 1.3 times the rated power. The actual output power also depends on the impedance of the load connected to the output, which corresponds to maximum power tracking.