I. What are the dangers of installing photovoltaic power generation on the roof?
The dangers of installing photovoltaic power generation on the roof include: damage to the roof structure, damage to the roof waterproofing layer, light pollution, and safety issues.
1. Damage to the roof structure: Solar photovoltaic power generation relies on the voltaic effect generated when the semiconductors inside solar panels are illuminated. If the roof structure was not reinforced or planned for heavy loads during the initial design phase, the heavy photovoltaic equipment may impact the roof structure, potentially damaging older houses.
2. Damage to the roof waterproofing layer: Installing the brackets requires drilling holes in the roof. After drilling, waterproofing must be applied again, otherwise leaks will occur when it rains. However, there are gaps between the screws and the holes. The waterproofing process requires high precision; if it's too thick, it will affect installation; if it's too thin, it will be ineffective. Furthermore, there's no way to verify if leaks have occurred; they often only appear months or even years later.
3. Damage to the roof waterproofing layer: Installing the brackets requires drilling holes in the roof, after which waterproofing must be applied again; otherwise, leaks will occur when it rains. However, there are gaps between the screws and the holes. The waterproofing process requires high precision; if it's too thick, it will affect installation; if it's too thin, it will be ineffective. Furthermore, there's no way to verify if leaks have occurred, and they often only appear months or even years later.
4. Safety Issues: In strong winds, solar panels may be blown over. Typhoons in coastal areas of my country can even topple cars; if the solar panels are not securely installed or the screws are rusted or aged, the panels may be blown off by the wind.
II. Is rooftop solar power generation stable?
Unstable.
Photovoltaic power generation is affected by seasonal changes, weather conditions, day-night cycles, and the intensity of solar radiation. Prolonged rainy or snowy days, cloudy days, and even changes in cloud cover can all affect photovoltaic power generation. When there is no sun, power generation is either nonexistent or minimal, which can disrupt the normal operation of electrical equipment.
