A brief analysis of the performance of photovoltaic inverters

Inverter, also known as power regulator, is an indispensable part of photovoltaic system. Usually, the process of converting DC power into AC power is called inversion, and the device that realizes the inversion process is called inverter or inverter. The name of inverter comes from this. The main function of photovoltaic inverter is to convert the DC power generated by solar panels into AC power used by household appliances.

The inverter is the heart of the photovoltaic system. All electricity generated by solar panels must be processed by the inverter before it can be output. The inverter plays an important role in the operation of the entire system. The following editor will introduce to you why the inverter is so magical.

Photovoltaic system schematic diagram

Maximum power tracking function to ensure maximum output power

The current and voltage of solar panels change with the intensity of solar radiation and the temperature of the solar cell module itself, so the output power will also change. In order to maximize the output power, it is necessary to obtain the maximum output power of the solar panel as much as possible. The MPPT tracking function of the inverter is designed for this feature. MPPT tracking is also called maximum power point tracking. According to calculations, the power generation of a system equipped with MPPT tracking can be 50% higher than that of a system without MPPT tracking. Therefore, if you want the photovoltaic system to generate more electricity, don't just look at the solar panels. How much of the electricity generated by the solar panels can be effectively output still depends on the inverter.

Household photovoltaic grid-connected inverter

Anti-separate operation function to ensure the safety of the power grid

When installing photovoltaic systems, many people hold the mentality that "even if the power grid goes out, my home can still use electricity", but they do not know that when the power grid goes out, their photovoltaic system will also stop working.

The reason for this phenomenon is that the inverter is generally equipped with an anti-islanding device. When the grid voltage is 0, the inverter will stop working. Do you feel cheated when you hear this? Don't worry, let me explain to you that the anti-islanding device is a necessary device for all photovoltaic grid-connected inverters. The reason for doing so is mainly for the safety of the grid. Imagine that the grid is out of power, the grid staff has already gone to the battle to repair the circuit, and your photovoltaic system is still uploading electricity... It is easy to cause safety accidents.

If you really want to have electricity at home when the power grid is out, you can consider installing a photovoltaic off-grid system. In this way, the electricity generated by the solar panels will be stored and can be used when the user needs it.

Inverter for ground power station

Automatically operate and stop according to the output power of the solar panel

After sunrise in the morning, the intensity of solar radiation gradually increases, and the output of the solar cell also increases accordingly. When the output power required by the inverter is reached, the inverter automatically starts to operate. After entering operation, the inverter will monitor the output of the solar cell module at all times. As long as the output power of the solar cell module is greater than the output power required by the inverter, the inverter will continue to operate until it stops at sunset. The inverter can also operate even on rainy days. When the output of the solar cell module becomes smaller and the inverter output is close to 0, the inverter will enter the standby state.

The above introduction is just some basic performance of the inverter. The inverter is an important and complex part of the photovoltaic system. A reliable photovoltaic system requires a reliable inverter.