Can It Be Installed On The Roof? How To Install A Home Solar Power Station?

The home solar  power station is a small distributed photovoltaic system, also called a household photovoltaic power station. Generally we see that they are installed on the roof, but not all roofs are suitable for installation. In the photovoltaic installation design, the actual situation should be fully considered, and the principles of economic application should be followed, with high reliability, durability, easy maintenance, and full consideration of the influence of geography and climate environment. 

The following points about the installation of home photovoltaic system, you must remember! 

Installation location selection 

Home PV site selection can generally be selected on the roof or open space, the conditions to be considered are the available area, housing structure And load bearing requirements, ground conditions and meteorological and hydrological conditions. If you choose to install on your own roof, the load-bearing capacity of the roof must be greater than 20kg/m2. 


If the house beam is a wooden structure, don't consider it. The PV system has a service life of 25 years. The wooden house beam is perishable. It is not recommended to install it. 

 

If you build a solar  power station on the roof of a herringbone structure, you can't design the optimal tilt angle like the ground power station, and consider the front and rear occlusion spacing. In order to facilitate the integration of the photovoltaic modules and the roof, the brackets are generally directly tiled on the south facing roof. The bracket and the roof are connected by a clamp, and the battery assembly is then mounted on the bracket. This approach is not only aesthetically pleasing, but also maximizes roof area utilization. 

 

In the construction of a solar solar  power station on a flat roof structure, it is necessary to erect a photovoltaic support and design the optimum inclination and the front and rear spacing of the components. 

 
If you choose to install on your own open space, you can use anchor piles and concrete strip bases as the base of the support. The specific choice of which needs to be considered from the geological conditions and costs. In addition, the design of the base strength of the bracket should be based on local meteorological conditions. 

Need to pay attention to, considering the thermal expansion and contraction effect of the component, the spacing between the upper and lower components should be about 3cm during installation. 


Grid-connected inverter selection 

Grid-connected inverters are mainly divided into three categories: high-frequency transformer type, low-frequency transformer type and transformerless type. According to the designed system and the specific requirements of the owner, the type of transformer is mainly considered from the aspects of safety and efficiency. 

Home distributed photovoltaic system is a small system, does not require high technical indicators, the inverter does not have an isolation transformer, the energy conversion efficiency is higher, combined with cost and other factors, it is more reasonable to choose a transformerless type. 


 

In order to ensure the safety and reliability of photovoltaic grid-connected power generation system, to prevent the damage of system components caused by external factors such as lightning strikes and surges, the lightning protection grounding device of the system is indispensable. The solar  power station is a three-level lightning protection building. The lightning protection and grounding involve the following two aspects: 

1. Try to avoid the projection of the lightning rod falling on the PV module 

2. The ground wire is the key to lightning protection and lightning protection. 

Prevent lightning induction: Metal casings including equipment, racks, metal pipes and cables must be grounded reliably. Each metal object must be connected to the grounding trunk separately. It is not allowed to be connected to the grounding trunk after series connection. 




Select reliable after-sales service 

Photovoltaic panels installed on the roof to sustain power generation will not be less than 25 years, whether it is large to several MW industrial and commercial roof distribution or small to several KW residents distributed power generation system, reliable The perfect after-sales service system is particularly important. 


Look for the brand and professionalism 

First of all, the choice of equipment must be quality assurance, especially components and inverters, do not choose cheap and inferior equipment for the sake of cheap, in this industry, the price is basically transparent As the saying goes, a price is worth the price, no one is alive Lei Feng. In daily business negotiations, there are often customers who ask for a certain company to have a much lower price. For such a situation, I can only advise the customer to seriously consider and carefully consider the choice of a trustworthy company. 

Secondly, the design of the overall system solution and the professionalism of the on-site installation cannot be ignored. In order to maximize the benefits, individual practitioners specially choose low-cost and inferior equipment to shoddy. In the process of on-site installation, they are also eager to make progress, ignoring the details that should be paid attention to during installation. Such a power generation system can imagine how to withstand years of testing? Therefore, PV brands must choose the trustworthy!