Small photovoltaic science knowledge

Solar photovoltaic webex: bloomy spring day has come, for pv users, electricity peak is coming, the little profit just want to chat with you today about photovoltaic system installation, operations of the common sense.

a: photovoltaic cells will be obscured as load consumption, other obscured produced by cell energy, obscured the battery will be fever, easy to form a hot spot effect. Reducing photovoltaic generating system, serious and even burned photovoltaic modules.

a: rainy or fog days the solar irradiance is low, but still photovoltaic modules under the weak light power. As long as the working state of the pv modules to the inverter start conditions, photovoltaic power generation system will work properly. Distributed grid pv system does not work, the load automatically by the grid, there exists no problem of power shortage and power.

a: directly influence the power factor is the radiation intensity, sunshine duration and the working temperature of photovoltaic modules, irradiation intensity is weak in winter, the sunshine duration shorten, thus generating capacity will be reduced in comparison with the summer. But distributed photovoltaic power generation system will be connected to the electricity grid, as long as there is electricity grid, family electric power shortage and the load will not happen.

a: distributed photovoltaic power generation systems are equipped with lightning protection devices, so you don't have to disconnect. For safety insurance, it is suggested that can choose disconnect junction box of the circuit breaker switch, to cut off the circuit connection with photovoltaic modules, avoid lightning protection module can't remove direct lightning harm. Operations staff to test the performance of the lightning protection module, timely to avoid the harm produced by lightning protection module failure.

a: dc side components border grounding, in the case of installation of high join straight surge protector, in addition, also need to add the ac ac surge protector.

a: the rain can clean, do not need special maintenance. If there are any adhesion dirt, can make a simple wipe with a soft cloth and water. Advice when clean glass surface photovoltaic components with a soft brush, gentle clean water, clean is used when the smaller efforts, in order to avoid damage to the glass surface, with coated glass components should pay attention to avoid damage to the coating layer.

a: wipe with water there is no danger, photovoltaic power generation systems and components have insulation and grounding protection. But in order to avoid wiping component in high temperature and strong sunlight on personal electric shock damage and possible damage to the component, suggest that in the morning or late in the afternoon cleaning the component.

a: snow accumulated on the component has a heavy snow, the need for manual cleaning. Can use soft items will be pushed down snow, be careful not to scratch the glass.

a: component has a certain bearing, but cannot be trample on the component cleaning, can cause damage of cracked components, power generation and the service life of components.

overall, strictly abide by the system of the manual of each component, and photovoltaic systems for regular inspection and cleaning maintenance, higher Dally over the electricity!

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