How to Design and Plan Household Photovoltaic Power Generation System?

Many people visualized the idea of household photovoltaic power generation system. From visualization to implementation, this idea requires a series of design and planning to show results. The conventional approach is to collect your living environment information, including house type, roof structure, roof area and monthly power consumption, etc. According to the above information, the product provider or scheme designer will design a set of the most economical and applicable system scheme for you, so as to maximize the benefits of the photovoltaic power generation system while meeting your power demand. To do this, you need to know the following questions.

What services do product providers usually provide?

Product providers generally provide one-stop services, including scheme design, system equipment, transportation and installation, technical support for grid connection and after-sales services.              

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What equipment does distributed photovoltaic power generation include?

major equipment 

Solar panel, inverter, AC / DC distribution box, photovoltaic metering meter box and support;

auxiliary equipment

Photovoltaic cable, AC cable, pipe clamp, lightning strip and lightning grounding, etc. Large power stations also need transformers, distribution cabinets and other auxiliary equipment.

What is the installation area of distributed photovoltaic power generation?

The installation area shall be calculated according to the actual area available for your roof. Here, take 1kW as an example. Currently, the inclined roof requires an area of 4m2; The flat roof needs an area of 5m2. If the capacity is increased, this type of push can be used.          

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How is the income of photovoltaic power generation system calculated?

The income includes three parts: electricity saved for self use, state subsidies and some local subsidies, and electricity revenue from selling electricity to power companies. Taking the user as an example, the formula is as follows:

Self use: the electricity charge is 0.45 yuan / kWh, and the subsidy is 0.03 yuan / kWh (state subsidy, 20 years, and some regions have local subsidies) =0.48 yuan / kWh.      

Surplus electricity on Grid: 0.38 yuan / kWh (benchmark coal electricity price); 0.03 yuan / kWh (state subsidy, 20 years) =0.41 yuan / kWh.

If the 1 kW system conservatively generates 1440 kwh a year, the annual income per kW is between 590.4 yuan (surplus electricity on the grid) - 691.2 yuan (self use). The more self use electricity, the higher the relative income of power generation!

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