Rooftop photovoltaic system is a clean energy system that uses solar panels installed on the roof space of a building to convert solar energy into electrical energy.
A typical rooftop photovoltaic system usually includes the following main accessories:
1. Solar panels (photovoltaic panels):
- Function: Solar panels are the core components of the photovoltaic system, responsible for capturing sunlight and converting it into direct current.
- Type: According to different materials, they can be divided into monocrystalline silicon, polycrystalline silicon and thin-film solar panels, etc.
2. Bracket system:
- Function: The bracket system is used to fix and support solar panels to ensure that they can be stably installed on the roof and maintain the best tilt angle for greater light efficiency.
- Material: Usually made of aluminum alloy, stainless steel or galvanized steel, with good corrosion resistance and load-bearing capacity.
3. Inverter:
- Function: The inverter converts the direct current (DC) generated by the solar panel into alternating current (AC) that can be used by household or commercial electrical equipment.
- Type: It is divided into centralized inverters, series inverters and micro inverters, etc., each with its own advantages and disadvantages.
4. Cables and connectors:
- Function: Cables are used to connect solar panels, inverters and other electrical equipment, while connectors ensure that these connections are safe and reliable.
- Requirements: Cables and connectors with strong weather resistance and good insulation performance should be selected to prevent leakage and short circuit.
5. Grounding system:
- Function: The grounding system is used to protect the photovoltaic system from lightning strikes and other electrical faults, while ensuring the safe operation of the system.
- Composition: Including grounding rods, grounding wires and grounding clamps, etc.
6. Distribution box (AC distribution box):
- Function: The distribution box is used to receive the AC power output by the inverter and distribute and protect it through electrical components such as circuit breakers and fuses.
- Function: It can also realize remote monitoring and management of the photovoltaic system.
7. Monitoring system (optional):
- Function: The monitoring system is used to monitor the operating status of the photovoltaic system in real time, including parameters such as power generation, voltage, current, and environmental data such as temperature, light intensity, etc.
- Type: There are independent monitoring systems and monitoring systems integrated in the inverter.
8. Lightning protection and overvoltage protection device:
- Function: Prevent overvoltage caused by lightning and grid failure from damaging the photovoltaic system.
- Includes: lightning rod, lightning arrester, surge protector, etc.
9. Ventilation and heat dissipation system (may be required for large photovoltaic systems):
- Function: For large photovoltaic systems, especially those installed in closed or semi-closed spaces, a good ventilation and heat dissipation system is required to prevent the equipment from overheating.
- Method: This can be achieved through natural ventilation or forced ventilation.
10. Cleaning and maintenance tools:
- Function: Regularly clean the dust, dirt and fallen leaves on the surface of the solar panel to maintain its photoelectric conversion efficiency.
- Tools: Including soft cloth, brush, water pipe, etc.
In summary, the installation of a rooftop photovoltaic system requires the coordinated work of a variety of accessories, each of which has its own unique role and importance.Correct selection and use of these accessories can ensure the efficient, safe and stable operation of the photovoltaic system.
