Generally speaking, the life of off-grid photovoltaic power generation systems is considered. The control and inverter integrated machine has complete internal protection circuits, with input overvoltage, input undervoltage, output overload, output short circuit, input DC reverse connection, overheat protection and other protective measures, which can effectively ensure the safety of use during use.

To develop an integrated system of photovoltaic and building, it is not something that photovoltaic producers can do independently., it should be listed as a first-level load range that guarantees power supply at any time; for residents, shops, etc. Forecast of load development. Among them, the monthly value of total solar radiation is essential. Available. Charge controller performance and measures to prevent lightning strikes Insulation measures should be taken between the battery and the ground, for example, wood boards or other insulating objects can be placed to prevent the Led light housing battery from being discharged due to a short circuit with the ground. The performance and potential of each main system.

The working status of the charge controller in each period. Building operations are embodied in the planning, construction, use, renovation, and demolition of buildings throughout the life cycle of various activities. The data related to climate conditions mainly include: annual average temperature, annual average maximum temperature, annual average minimum temperature, the longest continuous cloudy days in a year (including precipitation or snowfall days), annual average wind speed, annual maximum wind speed, annual hail times , The number of sandstorm days per year. As a general rule, make sure that there is no shadow from 9 am to 3 pm. and in their vicinity. 9 Cost analysis of off-grid photovoltaic power generation system Investment costs and operating costs constitute the main costs of off-grid photovoltaic power generation systems.

The convenience of operators and the transmission loss of low-voltage cables should be considered. At the same time, when determining the battery capacity, the larger the capacity is not the better, too large battery capacity scale can also cause problems. The solar resource data mainly includes: the total solar radiation (irradiance) of each month or the monthly daily average of the total solar radiation and radiation intensity. At present, there are disadvantages such as long distance, low local technology level, and limited independent grid capacity, which increase the difficulty of managing photovoltaic power plants.

The data obtained from the Meteorological Bureau is the radiation data of the horizontal plane, including: total horizontal plane radiation, horizontal plane direct radiation and horizontal plane scattered radiation. Therefore, the implementation of the operation monitoring of the power station, through scientific analysis of the system operation data, finds out the internal laws, provides a reliable basis for the system optimization design, and contributes to the larger-scale promotion of independent photovoltaic power generation systems. In summer, the sun rises early and sunsets late, and the sunshine time is much longer than in winter. The balance between the initial investment of the building and the investment in the photovoltaic project during the life cycle; comprehensively consider the operating cost of the building and its external costs. 

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