一、Disadvantages of installing photovoltaic power generation on the roof ：

1. Damage to the roof structure Solar photovoltaic power generation relies on the voltaic effect generated by the semiconductors inside the solar panels. If the roof structure is not reinforced at the beginning of the design. Since the photovoltaic power generation equipment itself is very heavy, it may damage the roof structure, especially if it is an old house, it is very likely to damage the roof.

2. Destroy the waterproof layer on the roof Installing the brackets of the photovoltaic power generation system requires drilling holes on the roof first. Drilling will destroy the original waterproof layer of the house. If the waterproof layer is not remade, water will leak when it rains. Due to the gap between the screws and the holes, waterproofing process requirements are required. Very high, if too thick it will affect installation. Too thin and ineffective. The second waterproofing effect is far less effective than the first and will increase the possibility of water leakage.

3. Light pollution problem If there are relatively tall buildings near the installation of photovoltaic power generation equipment, it is very likely that part of the sunlight will be reflected into the nearby buildings, causing light pollution to the indoor environment. Related studies have shown that excessive light can cause eye diseases and even affect people’s emotions. Problems such as anxiety, fatigue and decreased concentration occur.

4. Security issues If strong winds occur, photovoltaic panels may be blown over. Especially if the battery panel is not firmly installed or the screws are rusty and aged, the battery panel may be blown off by the wind, and subsequent maintenance costs will be higher.

二、What are the advantages of installing photovoltaic power generation on the roof：

1.Energy saving and emission reduction Installed photovoltaic power generation can achieve energy saving and emission reduction. Because it is installed on the roof, there is no need to worry about occupying space on the ground, and it is not restricted by resources or geography. It is safe and reliable to use, does not produce pollution, and does not produce loud noise. It also improves the thermal insulation of the roof, increases the air circulation in the middle and reduces direct sunlight, effectively reducing the temperature by 3-5°C, reducing the cost of cooling in summer.

2. Save peak electricity bills If you install photovoltaic power generation on the roof, you can generate your own electricity, and the remaining electricity can be effectively used. This not only solves the problem of large power consumption in corporate factories, but also brings economic profits to corporate factories.