Mono Solar Panel

Installation process of Residential Solar Power System

2018-08-06 11:12:07
As shown in the figure below, a domestic PV power plant generally consists of the following components:

But for ordinary families, how to build a photovoltaic grid-connected power station that is really suitable for home use? Residential solar power system
1. Photovoltaic grid-connected power station installation requirements
The last article in the introduction begins with a detailed description of the requirements for power plant installation. Here we also briefly say:
1.1 Household PV power plant installation requirements:
Determine if your home is suitable for installing a home PV power plant. First assess the firmness, area, and positive of the roof. The size of the house has little effect on the cost of installation, but before estimating the exact cost, the total amount of electricity consumed by the household and the proportion of solar power must be determined.
1.2 The actual orientation of the solar panels:
Installing solar panels on the roof is often told to face south facing. But some researchers have found that the most cost-effective installation is facing west. However, the study is only for the United States, while the electricity price in the United States is charged in a step-by-step manner. The peak electricity consumption is more expensive. In the afternoon and evening, the electricity peak is used. The electricity bill is more expensive than the morning, and the electricity generated by solar energy is more valuable. So, facing west, the peak power generation will come when the power is more valuable in the afternoon.
If facing west, after 5 pm, the power generated by the panel still has 55% of the peak power; if it faces south, the power generated at this time is only 15% of the peak value. Installing the sun tracker keeps the panel always facing the sun, increasing the output by 45%, but the cost of the tracker completely offsets its benefits.

2. Capacity design of home photovoltaic grid-connected power station
The capacity is the power generated by the photovoltaic power station and is generally designed according to the building roof area of the residents. The installation space can be a beveled roof or a flat roof. The flat roof area of 1 square meter currently generates about 75W, and the roof load increases by about 35-45kg. The south facing sloped roof can be built about 130W for 1 square meter, and the roof load is increased by about 15kg. The general population can build a 3kW-5kW power station.

3. Selection of photovoltaic cell components

4.Selection of photovoltaic grid-connected inverter

5.Selection of other components
For the selection of photovoltaic cell components, photovoltaic grid-connected inverter and other components during the installation of residential solar power systems, please see the next blog post Residential solar power system installation component selection.

6. Solar photovoltaic system installation form
There are mainly horizontal roofs and sloping roofs.
6.1 horizontal roof
On horizontal roofs, PV arrays can be installed at optimal angles for maximum power generation; and conventional crystalline silicon PV modules can be used to reduce component investment costs, often with relatively good economics. However, the aesthetics of this type of installation are general.
6.2 inclined roof
In the northern hemisphere, roofs that are inclined to south, southeast, southwest, east, or west can be used to mount photovoltaic arrays. On the sloping roof in the south direction, it can be installed at the best angle or near the optimal angle to obtain a larger power generation; conventional crystalline silicon photovoltaic modules can be used, which have good performance and low cost, and therefore have better economy. And it does not conflict with the function of the building, it can be closely combined with the roof, and the appearance is better. The power generation performance of other oriented (positive south) roofs is second.

7. Scheme design
Due to the different structure of the user's house, professional site measurement calculation, analysis, equipment selection and owner's needs are required to design a system plan that meets the owner's power generation requirements, capital budget, and house structure. Youyou Rural PV can arrange on-site measurement in Guangdong and Anhui provinces!

8. Installation and commissioning
Installation requires qualified PV personnel to install. After the installation of the battery components, the series-parallel connection is best done after the sun goes down, avoiding high-voltage electric shock, and at the same time doing lightning protection grounding. In addition, pay attention to the wind resistance level of the bracket, and the northern users should pay attention to the snow resistance level. Commissioning can be coordinated with the personnel of the power company.
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