Factors Affecting the Output Power of Photovoltaic Power Stations and Solutions
There are many factors that affect the output power of a photovoltaic power station, including solar radiation, the tilt angle of the solar panels, dust and shading, and the temperature characteristics of the panels.
Solutions:
Before installation, check whether the power of each panel is sufficient.
Adjust the installation angle and orientation of the panels.
Check for shading and dust on the panels.
Verify that the voltage of the panels in series is within the required range; if the voltage is too low, system efficiency will decrease.
Before installing multi-string configurations, check the open-circuit voltage of each string, ensuring the difference does not exceed 5V. If the voltage is incorrect, inspect the wiring and connections.
During installation, connect in batches and record the power of each group. The power difference between strings should not exceed 2%.
Ensure good ventilation in the installation area. If the inverter's heat is not dissipated promptly or it is exposed directly to sunlight, the inverter temperature may rise too high.
The inverter has dual MPPT inputs, each handling 50% of the total input power. Ideally, the designed installation power for each input should be equal. If only one MPPT terminal is used, the output power will be halved.
Poor cable connections, excessively long cables, or thin wires can cause voltage loss, leading to power loss.
The capacity of the grid-connected AC switch of the photovoltaic power station is too small, failing to meet the inverter’s output requirements.
These are the factors affecting the output power of photovoltaic power stations and their solutions, as introduced by Hengyuan Tai.