Off-grid power generation system Off-grid power generation system consists of solar panels, batteries and charge-discharge controller and off-grid inverter, solar power controller (photovoltaic controller and wind and solar complementary controller) on the regulation and control of the electrical energy, on the one hand The adjusted energy sent to the DC load or AC load, on the other hand the excess energy sent to the battery pack storage, when the sent electricity can not meet the load needs, the controller in turn the battery power to the load. After the battery is fully charged, the controller controls the battery not to be overcharged. When the stored energy stored in the battery, the controller to control the battery is not over-discharge, to protect the battery. Grid-connected power generation system Grid-connected power generation system is the photovoltaic array, wind turbines and fuel cells and other renewable energy generated by the battery without storage, through the grid inverter directly fed back into the grid power generation system. Because the direct input of power into the grid, dispense with the configuration of the battery, save the battery energy storage and release process, you can make full use of renewable energy issued by the power, reduce energy consumption and reduce system costs. Grid-connected power generation systems can use both mains and renewable energy sources in parallel as a source of local AC loads, reducing the overall system load-to-power rate. At the same time, renewable energy grid-connected system can play a role in regulating the public grid. Grid-connected power generation system is the development direction of solar energy and wind power generation and represents the most attractive energy utilization technology in the 21st century. In the PV off-grid system and photovoltaic grid system, we compare the following aspects: First, the cost of the problem: Off-grid system to be used in battery and solar charge controller, an increase of costs, the general price of the solar off-grid system is more than 1.5 times the quoted price of solar energy grid system; Battery life is generally about 5 years (with the depth of charge and discharge different battery life, daily charge and discharge conditions of use, the battery life is generally not more than 3-5 years), which is great when the battery is replaced Of the investment, but also need regular maintenance, an increase of workload; Second, the efficiency issue: (A) photovoltaic off-grid system efficiency 1, battery components: Tianwei Yingli YL180 (35) 1580x808 Component parameters: Component Type: Polycrystalline PV Module Peak power: 180W; Peak voltage: 35.5V; Open circuit voltage: 44.0V; Peak current: 5.07A; Short circuit current: 5.45A; Component Size: 1580mm × 808mm × 50mm Module Efficiency: 14.1% 2, solar controller: the ideal efficiency of 90%; 3, the battery uses a dedicated photovoltaic gel batteries, 12 volt series gel batteries; under the ideal efficiency of 85% 4, independent system inverter, the maximum efficiency of 90%; The highest efficiency of the entire system = 0.141 × 0.9 × 0.85 × 0.9 × 100% = 9.7% (ideally) 5, the independent system of batteries in the full charge, the panels will be most of the power generated will be wasted, not only failing to save energy, but also reduce the system's actual operating efficiency; (B) grid-connected photovoltaic system efficiency 1, battery components: Tianwei Yingli YL180 (35) 1580x808 Component parameters: Component Type: Polycrystalline PV Module Peak power: 180W; Peak voltage: 35.5V; Open circuit voltage: 44.0V; Peak current: 5.07A; Short circuit current: 5.45A; Component Size: 1580mm × 808mm × 50mm Module Efficiency: 14.1% 2, the maximum efficiency of photovoltaic grid inverter can reach 97%; In the grid system eliminates the solar controller, battery, so as not to consider the loss of efficiency; Overall system efficiency = 0.141 × 0.97 × 100% = 13.677% (ideally) Niigata Concrete Pump Spare Parts Niigata Concrete Pump Spare Parts Niigata Concrete Pump Spare Parts HBYM GROUP Co,.LTD , https://www.hbympumpparts.com