System list:
     Solar off-grid system is a PV power generation system which power the load though solar modules and solar controller inverter all in one, 
    and charge the battery when there is excess power. 
     It mainly includes PV panels and frames, combiner box, batteries, etc. 
    The system is widely used in village family, school, office building, communication base station and other places without electricity or stable mains supply. 

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     On grid solar system can convert solar energy to electricity, 
     and send the electricity to mains power grid through on-grid inverter without battery. 
     It mainly includes solar modules, mounting brackets, combiner box, solar on-grid inverter, distribution box and other equipments. 
     It is widely used in residential building, office building, college, plant and PV power station. 

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     Introduction to  PV off-grid system

1. Off-grid photovoltaic power generation
    Off-grid photovoltaic power generation also named individual photovoltaic power generation, photovoltaic grid can covert the solar energy into electrical energy when it is sun , it can providing electricity  through the charge and discharge controller of the solar energy ,charging the storage battery as well ; when there is no sun ,the storage battery can provide electricity to the DC load and to the stand-alone inverters directly , then the DC become AC through the stand-alone inverters, then the electricity is available to the AC load.

2. The advantage of PV off-grid
    (1) Easing install and operation, economic and inflexible.
    (2)Generating and providing electricity separately, the electricity-providing system is reliable; it is easy to maintenance locally.
    (3)This system drived by the green energy, it has the advantages of energy conservation and emission reduction, environmental-friendly. It does not consume other kind of energy.
    (4) Solving the problems of no electricity and lack of electricity and bad quality of electricity-providing efficiently.

3. The applicable area of PV off-grid generate system
    It is applicable to the area of low capacitance and great separation. such as isolated mountain area , no electricity covered area , island , communication foundation and street light.

4. The formation of the PV off-grid
    Solar panel: covert solar energy into electrical energy.
    Charge controller: prevent storage battery from over charge , over discharge , counter charge , over current and over loading.
     Inverter: transit the low-voltage DC into normal AC.
    Connector:  making sure the line connect steadily with every device.