What will affect the photovoltaic modules output power?

Light intensity: The stronger the light, the more energy the photovoltaic module receives, and the higher the output power is usually. For example, on a sunny day with abundant sunlight, the output power of the photovoltaic module will be significantly higher than on a cloudy or overcast day.
Temperature: Excessive temperature will reduce the output power of the photovoltaic module. Generally speaking, when the working temperature of the module rises, its power generation efficiency will decline. Just like in a hot summer, the power generation performance of the photovoltaic module may be affected to a certain extent.
Shadow shading: When some components are shaded, a hot spot effect will occur. Not only can the shaded part not generate electricity normally, but it will also consume the electricity generated by the other unshaded parts, thereby reducing the overall output power. For example, the shadow of a nearby building or tree falls on the photovoltaic module.
Aging of components: As the usage time increases, the performance of the photovoltaic module will gradually decline, and the output power will also decrease.
Installation angle and direction: If the installation angle is unreasonable and cannot receive sunlight to the maximum extent, or the direction is incorrect, such as facing north instead of south (in the Northern Hemisphere), it will affect the output power of the module.
Dust and dirt: Dust and dirt on the surface of the module will block the incidence of sunlight, reduce the received light energy of the module, and thereby reduce the output power.
Series resistance and parallel resistance: The resistance inside the photovoltaic module will cause power loss and thereby affect the output power.
Quality and performance of photovoltaic cells: Batteries of different qualities and performances have differences in the efficiency of converting light energy into electrical energy, thereby affecting the overall output power of the module.