Spring

Q: Can shadows from houses, leaves or even bird droppings affect the photovoltaic tiles roofing system?

A: In photovoltaic tiles roofing, even the shadows of houses, leaves or bird droppings can greatly affect the photovoltaic tiles roofing system. If there is an inconsistency, a “hot spot effect” will occur on the cells with poorer electrical properties or on the shaded cells. The shaded PV cells in the series branch consume the energy generated by the other illuminated PV cells as a load, and the shaded cells heat up and damage the entire PV solar module; therefore, a bypass diode needs to be added to the PV solar module to avoid the hot-spot effect in the series branch. For the hot spot effect in parallel circuits, it can be solved by installing a DC fuse on each PV string.

In addition, even without hot spot effect, shading of the PV cells can affect the power generation. Therefore, in addition to regular inspections and cleaning to ensure that they are working properly, it is best to avoid dealing with shading that occurs around the building in the first place, such as trees, shrubs, etc.

Summer

Q1：What are the specific and effective lightning protection measures for household distributed photovoltaic tiles roofing system in thunderstorm?

A1：Lightning strikes on solar systems will result in the destruction of equipment and prevent normal operation. Therefore, lightning protection measures are essential for solar systems. Lightning protection measures can include the following items:

Ensuring that solar roof tiles are reliably connected and grounded; installing a lightning protector in the PV meter box and grounding it reliably; and ensuring that the PV inverter is grounded reliably.

If the grounding system of the building is already very complete, then when installing photovoltaic tiles roofing system on it, there is generally no need to lay a separate grounding system, and only need to connect the grounding wire of the solar system with the grounding system of the building. As to whether it is necessary to set up the lightning catcher or lightning rod to prevent direct lightning, it needs to be determined according to the specific situation.

Q2：Do I need to disconnect the power generation in thunderstorm?

A2: Home distributed photovoltaic tiles roofing systems are equipped with lightning protection devices, so they do not need to be dismantled. However, in order to be more safe, it is recommended to use the circuit breaker switch in the meter box to cut off the circuit connection of the PV solar module, so as to avoid the harm caused by the direct lightning which cannot be eliminated by the lightning protection module. Operation and maintenance personnel should regularly test the performance of the lightning protection module to avoid the potential harm caused by the failure of the lightning protection module.

Q3：Do I need to replace the device immediately when it is broken under high temperature environment?

A3: No immediate replacement is allowed. If replacement is needed, it is recommended to do it in the morning or late afternoon. At the same time, be sure to contact the operation and maintenance personnel in a timely manner, the professional staff to go to the replacement.

Q4: How to solve the problem of PV solar module heating and ventilation?

A4：With the rising temperature, the output power of solar module will be reduced.Sgbsolar's solar roof tiles, like traditional terracotta tiles, are fixed on the hanging tile bar, and there exists a gap of about 5-10 cm with the roof surface, which is conducive to the air circulation, forming a good ventilation cycle, and at the same time, can well achieve the heat dissipation effect.

Autumn

Q1：What do I need to pay attention to for photovoltaic tiles roofing system fire prevention and fire fighting in dry weather?

A1: It is prohibited to stack flammable and explosive materials near the home distributed solar system. In case of fire, it will cause unpredictable loss of people and property. In addition to basic fire safety measures, photovoltaic tiles roofing systems are required to be equipped with self-detection, arc recognition and fire protection features to reduce the likelihood of fire. In addition, an easy-to-operate emergency DC system disconnect switch is required.

Q2: Do the solar tiles generate electricity normally in continuous rainy or hazy weather? Will there be insufficient power or power failure?

A2: The PV solar module can generate electricity even under certain low light conditions. However, if continuous rainy or hazy weather occurs, resulting in lower solar irradiance, the operating voltage of the photovoltaic tiles roofing system may not reach the start-up voltage of the inverter, thus making the system unable to work. The home distributed solar system operates in parallel with the distribution grid, so when the solar system is unable to meet the load demand or is unable to work due to cloudy or rainy weather, the power from the grid will automatically replenish the system, thus avoiding the problem of insufficient power supply and power outage.

Winter

Q1: Will cold weather lead to insufficient power?

A1: The power generation of photovoltaic tiles roofing system is affected by the temperature, which is directly influenced by the irradiation intensity, sunshine duration and the working temperature of the solar module. In winter, the irradiation intensity is weaker and the sunshine duration is shorter, so the power generation is generally lower than in summer, which is a normal phenomenon. However, since the home distributed solar system is connected to the power grid, as long as there is power in the grid, there will not be a situation where the home load cannot get enough power or there is a power outage.

Q2: How to clean the solar module after snow?

A2: Solar roof tiles are installed on roofs with a certain slope, and the slope is designed to prevent snow from accumulating. In special cases, if heavy snow accumulates on the solar roof tiles, they need to be cleaned. Soft objects can be used to push the snow off, but care should be taken not to scratch the glass surfaces. solar roof tiles are load-bearing and pressure-resistant and can be stepped on to clear them. Although solar roof tiles can work at temperatures as low as minus 40 degrees Celsius, it is generally recommended that they be cleaned when the snow is not too thick to avoid excessive icing of the solar module.

Q3: Can household PV combat extreme weather? For example, hail

A3：sgbsolar's solar roof tiles are extremely weather-resistant and can cope with all kinds of extreme weather. And through the IEC salt spray/acid/alkali/accelerated aging/high and low temperature impact/ultraviolet light and other environmental chamber test, and through the IEC hail impact/static load/fireproof/waterproof test. T MAX O Maximum static load (wind load/snow load) of 5400pa, so in general, completely fearless of hail, snow, and other extreme weather, and will not cause any threat to the home or building photovoltaic tiles roofing system. tiles roofing system.

Other Frequently Asked Questions

1、How to install solar roof tiles?

2、How to replace solar roof tiles?

3、What are the common failures of solar roof tiles roof?

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