Nowadays, household solar power generation systems have entered many homes. In the hot summer, the peak of the use of home appliances has come. For consumers who are not yet familiar with photovoltaic systems, there are many misunderstandings in the use process, resulting in unsatisfactory use effects, so they are full of complaints about photovoltaic systems. In this regard, we have summarized the six major misunderstandings in the use of home photovoltaic owners. Can you see if there are any tricks?
Misunderstanding 1: The output power of the photovoltaic system should reach the nominal power
Hot summer and sun exposure, the whole day photovoltaic power generation has reached the highest level of the year, but the output power of the photovoltaic system has not reached the nominal value of the DC module, why? Because photovoltaic modules have a negative temperature coefficient characteristic, the module temperature of the photovoltaic system in summer reaches the highest throughout the year, but the power can only reach about 80% of the maximum nominal value.
Special reminder: In spring and autumn, the peak instantaneous output power of the photovoltaic system will reach the highest.
Misunderstanding 2: North-facing components will not generate electricity
Many owners consider the whole house to cover photovoltaic modules when designing the roof to achieve the effect of heat insulation, heat preservation, and increase power generation. However, many owners feel that the system does not generate electricity except for due south. In fact, Shanghai is located in a lower latitude area, even if the phalanx faces north, the annual loss of optimal power generation will not be less than 25%. To the east and west is approximately 93% of the optimal power generation direction.
Special reminder: The design concept of home photovoltaic system and large ground power station is different. The roof of the home is the most precious resource. Install as many as possible to maximize the comprehensive income, but pay attention to the matching of strings.
Misunderstanding 3: Home photovoltaic power generation system does not need monitoring system
There is almost no monitoring system in all home appliance systems, let alone remote monitoring systems. But the photovoltaic system is a "quiet beauty". If there is no monitoring system, you have no idea about the operation of the power station. The operation rate of the power station is the most fundamental factor that determines the income of the power station. The way to effectively improve the operation rate of the power station is to install 24/7 uninterrupted monitoring system.
Special reminder: There are many monitoring methods and methods at present, including the monitoring that comes with the inverter, and the independent monitoring of a third party. It is recommended to use a third-party independent monitoring system.
Misunderstanding 4: The exposed inverter needs to be equipped with an awning
When the inverter is designed, water-proof, acid-proof, and rust-proof functions are added, and no additional shielding is required. Therefore, if the suspension position of the outdoor unit is good, the awning is not needed to prevent wind and rain. However, if you often need to have an outdoor machine exposed to the sun, it is best to have an awning. When installing the awning, pay attention to the size and position spacing of the awning, because too small awning will affect the heat exchange of the inverter.
Special reminder: The protection level of the inverter is IP65. and generally it only needs to be installed outdoors where it is not exposed to the sun.
Misunderstanding 5: PV modules need to be cleaned frequently
Many owners think that photovoltaic modules must be cleaned after they have been used for a period of time. In fact, this view is not correct. The surface of the photovoltaic module has a self-cleaning effect, and regular rain will wash away the dust on the surface. Frequent cleaning will not only not greatly increase the power generation, but will also cause a waste of water resources.
Special reminder: The components need regular inspection and maintenance to remove the dirt that is not easily washed away by natural rain, such as bird droppings. And it's best to clean it on a cloudy day.
Misunderstanding 6: Photovoltaic system can be guaranteed for 30 years
The design life of the photovoltaic system is 25 years, which is the highest life expectancy that can be guaranteed under current mass production conditions. However, the entire home power generation system is composed of solar modules, solar inverters, monitoring systems, bracket systems, electrical boxes, conduits, terminals, etc. In normal use, aging and replacement are unavoidable. For example, solar inverters may face replacement after 10-15 years of operation. Electrical switch boxes will also be damaged and replaced after a few years due to engineering quality reasons.
Special reminder: Except for the longest life of solar modules, the entire photovoltaic system cannot guarantee that it will not be broken for 25 years.
Although distributed photovoltaics are becoming popular now, there are still many people who are still unclear about photovoltaic-related common sense, so there have been misunderstandings. This will affect consumers' sense of use, and will also have a significant impact on the development of distributed photovoltaics. In addition, when talking about portable solar panels, portable solar panels do not have these misunderstandings. For example, our ITEHIL solar panel does not have an inverter, and it does not need monitoring software. You only need to connect to our ITEHIL solar generator station. Know whether it is good or bad at present, it is all made up of solar modules, so the service life of ITEHIL must reach 30 years, please rest assured to use it.
