Why We Worry About Photovoltaic Grid-Connected Power System Application
Author: Source: Datetime: 2017-01-13 15:02:45
Recently someone worry about their village is installed photovoltaic grid-connected power system future application of worry, because worry about the battery does not to force.
And then return to the villagers of this concern, in fact, there is a misunderstanding, and now many rural PV systems are generally connected to the system, to take the "spontaneous use, more than electricity online" model, so do not need batteries . At present, the photovoltaic power generation according to the system classification can have two modes, one is off-grid photovoltaic power generation system, a grid-connected power generation system.
Next, we talk about off-grid photovoltaic power generation system and grid-connected power generation system.
Off-grid PV systems are mainly used in areas where grid-connected or grid-connected power is not stable. Off-grid PV systems are typically composed of portable solar power generator solar modules, controllers, inverters, battery packs and rack systems. Photovoltaic power generation system during the day in addition to their own use of direct current, but also can be stored in the battery for the night, rainy days to provide electricity. Off-grid system is an independent solution, without the need to integrate into the grid, can be flexible to install, flexible use, photovoltaic hair clean, low cost.
The PV grid-connected system is usually composed of solar power batteries modules, inverters, photovoltaic racks, convergence boxes, etc., where the difference between electricity and off-grid, it is necessary to access the local power grid, in addition to spontaneous use, Into the power grid, access to electricity income, the state will give subsidies for photovoltaic power generation, 0.42 yuan per degree.
In the present, the grid-connected system is widely used in rural areas, compared with the off-grid system, and the grid system has a relatively low cost and long life. Lead-acid batteries, lithium batteries, these two types of batteries are inadequate, lead-acid battery charge and discharge cycle life is relatively low, follow-up operation and maintenance costs are higher. Lithium battery procurement costs higher, but also need a reasonable technical solutions, in some energy storage systems because of lack of technical solutions, the system is running, has failed to achieve the desired benefits, but the system life reduced invisible operation and maintenance costs .
In addition to the battery an additional cost of photovoltaic power generation, for rural users, the price is not close to the people, as to promote a large area there is still a long way to go.
Therefore, the photovoltaic power generation system in rural areas is not the standard battery, photovoltaic and off-grid or there is a fundamental difference between the rural users for the choice of photovoltaic power generation system, or tend to grid system, when the face of a business selling batteries Off-grid system, please do not misunderstanding area.
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