Core clew: household roof photovoltaic power station has gradually come into our lives, for a lot of photovoltaic enthusiasts or beginning ability is very strong friends hope can install a photovoltaic system on their own, small make up today about finishing the common problem for installation household photovoltaic power station, steps, create your own roof distributed photovoltaic power generation systems. To apply for a first step to the local power supply bureau to apply for. With the material such as id card, hu kou book, house property card is dealt with, if the roof is public, need to provide another the consent of the other owners, property management, residents' committees. Provide application, a power supply enterprise send people to the scene investigation, issued by a receiver

Household roof photovoltaic power station has gradually come into our lives, for a lot of photovoltaic enthusiasts or beginning ability is very strong friends hope can install a photovoltaic system on their own, small make up today about finishing the common problem for installation household photovoltaic power station, steps, create your own roof distributed photovoltaic power generation systems.

The first step to apply for

Go to the local power supply bureau to apply for. With the material such as id card, hu kou book, house property card is dealt with, if the roof is public, need to provide another the consent of the other owners, property management, residents' committees.

Provide application, power supply enterprises send people to the scene reconnaissance, issue a accept scheme, citizens according to the scheme design, purchase qualified unit of solar panels, inverter, brackets, cable, etc., for installation, then the power supply enterprise to review. After approval, send people to install metering device, power supply enterprises to sign a contract with grid, parallel debugging.

State grid company promises to complete the whole process in 45 working days. From the perspective of part family photovoltaic power station, power supply enterprises can complete service process within 45 days.

The second step is to install

Power supply bureau agreed to install application, after the owner in accordance with the requirements of power supply bureau to design, purchase materials.

Household photovoltaic system as shown in the figure below, general photovoltaic components include (1), (2) cables, (3) grid inverter, (4) grid switch box, (5) measuring instrument.

Solar power system capacity design

The capacity of the system general design according to roof available area and power consumption. Per kilowatt every day about 4 KWH, need 10 square installation area.

The choice of grid solar inverters

Grid solar power inverter as photovoltaic cell components and grid interface device, the photovoltaic battery dc can be converted into ac power and transmission to the grid, the photovoltaic (pv) grid power system plays a vital role.

In grid inverter has two kinds, one is a centralized grid photovoltaic inverter, the minimum power is 1 kw, ranging from 150 v to 550 v input voltage. Additionally one kind is the micro grid photovoltaic inverter, commonly used in the voltage grade of AC220V, power from 200 w to 500 w, the range of input voltage is 12 v ~ 28 VDC. The volume of a centralized grid inverter generally larger suitable for hanging installation, small micro grid photovoltaic inverter, general and battery components installed cable choice together

Cables can select photovoltaic dedicated cable, but the price is high, quantity is little also not good to buy. Short or use BV cable, according to one square millimeter for 6 a current calculation. Power of 3 kw system, for example, for pv input cable, for DC350V rated input voltage of the inverter voltage, the current of 3000 w / 350 v = 8.57 A, choose BV2.5 cables. For inverter output cables, rated output voltage of the inverter voltage is AC220V, then the current material for 3000 w / 220 v 13.63 A, in theory, also can choose BV2.5 cables, but to be on the safe side can improve A grade, choose BV4 cables. Because of the photovoltaic power generation period for 25 years, in order to ensure the system stable job for a long time, suggested that as far as possible choose special pv cable.

Solar photovoltaic power generation system installation form

Mainly include horizontal roof, sloping roof and photovoltaic lighting. Respectively are as follows:

1) the level of the roof

In a horizontal roof, pv array can be installed in accordance with the best Angle, in order to gain maximum capacity; And can be used conventional crystalline silicon photovoltaic modules, reduce investment cost components, often economy is relatively good. But the beautiful sex of the installation method.

2) sloping roofs

In the northern hemisphere, to the south, southeast and southwest is moving west, east, or sloping roof can be used for installation of pv array. In the south to the sloping roof, which can be installed in accordance with the best Angle or close to the best Angle, so as to obtain larger capacity; Conventional crystalline silicon pv modules can be used, good performance, low cost, so it has good economy. And the function is not conflict with the architecture, can be closely integrated with the roof, beautiful sex is good. Other toward the roof power generation performance.