What’s the function of the solar inverter

The solar inverter not only has the function of DC-AC conversion, but also has the function of maximizing the performance of the solar panel and the function of system fault protection.

1. Automatic operation and stop function

After sunrise in the morning, the intensity of solar radiation increases gradually, and the output of the solar panel also increases. When the output power required by the inverter is reached, the inverter starts to run automatically. After entering into operation, the inverter will monitor the output of the solar module all the time. As long as the output power of the solar module is greater than the output power required for the inverter to work, the inverter will continue to run. It will stop until sunset. Even if it is cloudy and rainy, the inverter can also operate. When the output of the solar module becomes smaller and the output of the inverter is close to 0, the inverter will form a standby state.

2. Maximum power tracking control function

The output of the solar module varies with the intensity of solar radiation and the temperature of the solar module itself (cell temperature). In addition, since the solar module has the characteristic that the voltage decreases as the current increases, therefore there is an optimal operating point where the maximum power can be obtained. The intensity of solar radiation is changing, and obviously the optimal working point is also changing. Relative to these changes, the operating point of the solar module is always at the maximum power point, and the system always obtains the maximum power output from the solar module. This control is the maximum power tracking control. The biggest feature of inverters for solar power systems is that they include the function of maximum power point tracking (MPPT).