200W solar panelBased on 6 hours of sunlight per day, this represents 1.2 kilowatt hours of electricity.
Based on 6 hours of sunshine per day, 200W*6h=1200Wh=1.2KWh, or 1.2 kilowatt hours of electricity.
The power generation efficiency of solar panels is also different depending on the lighting angle. The power generation efficiency of solar panels is highest under vertical lighting. The output power of the same solar panel is different under different. light intensities.
The power of the power supply can be divided into: rated power, maximum power and peak power. Rated power: the ambient temperature is between -5 and 50 degrees, the input voltage is between 180V^264V, and the power supply can output stably for a long time, that is, the stable power at this time is 200 W.
Can the solar panel still be used if there are hot spots?
The maximum water temperature in the solar panel is of 100 degrees.
However, solar power design requires the temperature to reach 45 degrees and not exceed 60 degrees. This beach is the best. Water temperatures above 80 degrees can easily damage the water tank! If solar energy is not used for a long period of time, it is likely that the temperature inside will reach 100 degrees every day.
Generally, the water temperature of vacuum tube solar water heaters can reach more than 60 degrees Celsius in summer and around 45 degrees Celsius in winter. The vacuum tube cannot be adjusted and will continue to heat in cloudy weather. and in rainy days, high-power electric heating system is used, but it is better than ordinary electric heatinginary which consumes more electricity.
Since flat panel solar water heaters use advanced heat collection plate cores, the heat absorption rate of the plate core is higher than that of vacuum tubes. Water temperatures can reach over 90 degrees Celsius in summer. and around 70 degrees Celsius in winter. In addition, flat panel solar water heaters can adjust the water temperature by themselves, greater freedom of use in rainy days, electric heating design is adopted, which can save 70-90%. energy than ordinary electric water heaters.
Factors that affect water temperature of solar water heaters:
1. The ratio of water volume to heat collection surface area for the same volume of water tank, if water diameter; The tank is reduced and the length of the water tank is extended. More collector tubesHeaters can be placed and the water temperature will naturally increase. This is the most effective way to increase water temperature.
2. The quality of the glass collector tube coating; if the quality of the vacuum tube coating is good, its heat absorption performance will be better, its performance will decline more slowly, and the water temperature will of course be higher. .
3. The leaving water temperature; the morning water temperature is 60 degrees, which is of course higher than the morning water temperature which is 20 degrees. If you use less water, more water will remain and the water temperature will be higher; if the water temperature is higher, you will use less water, and the water temperature will be higher if you use more water; the temperature will be lower; if the water temperature is lower, you will use more water and the water temperature will not bewas not higher.
4. The thermal insulation performance of the water tank; Of course, the water temperature will be higher if the thermal insulation performance is good.
5. Meter accuracy; the same water will give different readings. This is a meter accuracy issue.
Temperature coefficient of solar panels
Cannot be used.
In addition to having a serious impact on the lifespan of solar panel components, the hot spot effect can also burn solar panel components or even cause fires.
Under certain conditions, a shaded solar panel component in a series branch will be used as a load to consume energy generated by other illuminated solar panel components. The shaded components of the solar panel will generate heat at this time, which is the hot spot effect. This effectt can seriously damage solar panels.
Generally speaking, it is estimated that when the temperature of the photovoltaic components of the solar panel is 30°C in normal operation and the local temperature is 6.5°C higher than the ambient temperature, the local solar panel This component can be considered a hot spot area.
Solar panel market conditions
The European Trade Commission may propose in May to impose punitive tariffs of more than 30% on Chinese solar panels to protect European manufacturers.
Reuters cited diplomats as saying that EU Trade Commissioner Karel De Gut would propose imposing punitive tariffs on Chinese solar panels at the EU trade representatives' meeting on 8, and that she should receive support. In accordance with current European regulations, temporary tax measuresrelevant will come into force before June 6.
However, even if the EU issues a preliminary decision by then, there will still be room for negotiation with China to resolve the issue. If both parties successfully negotiate, they can avoid punitive tariff measures that can be implemented for up to five years.
The European Commission has launched anti-dumping and countervailing investigations respectively into solar panels imported from China, involving Chinese companies' exports to the EU worth up to €21 billion (approximately 27.6 billion US dollars), which is called by industry insiders The largest "double counterfeiting" case involving the largest sum of money in the history of the European Union.
These temperature coefficients indicate the effect of temperature changes on the electrical performance of the tipsto solar. In simple terms, the higher the temperature coefficient, the greater the change in electrical properties such as output power, open circuit voltage, short circuit current, etc. Specifically, in places with large temperature differences and high temperatures, solar panels with higher temperature coefficients cannot be used, or sufficient leeway should be left in the design.