How to Use off Grid Inverter?

The inverter is an indispensable part of the AC photovoltaic power generation system. Due to various technical or policy reasons, it will take a long time to connect all independent photovoltaic AC power generation systems to the national unified power grid. Therefore, the market distinguishes photovoltaic inverters into two types: photovoltaic off grid inverter and photovoltaic grid connected inverter.

• What is the working mode of pure inverse off grid inverter?

• What is the working mode of the mains complementary off grid inverter?

• How to calculate the maximum power of an off grid inverter?

What is the working mode of pure inverse off grid inverter?

The DC power generated by the solar panel passes through the external charge and discharge controller, which usually charges the battery. When power is needed, the off grid inverter inverts the DC power of the battery to a stable AC power for the load.

What is the working mode of the mains complementary off grid inverter?

1: Mains type: the direct current generated by the solar panel charges the battery through the external charge and discharge controller; When the mains power is cut off or abnormal, the solar cell inverts the DC of the battery through the off grid inverter to a stable AC for the load; This conversion is fully automatic; When the mains power returns to normal, it will be switched to mains power supply immediately;

2: Main solar power supply type: the DC power generated by the solar power generation panel charges the battery through the external charge and discharge controller. When power is needed, the solar cell inverts the stable AC power through the off grid inverter for the load; When the battery capacity is insufficient, it will automatically switch to the mains power supply mode.

How to calculate the maximum power of an off grid inverter?

The off grid inverter will use the maximum power point tracking technology to extract the maximum possible power from the solar panel. There is a complex relationship between solar irradiance, temperature, and the total resistance of solar cells, so the output efficiency will change nonlinearly, which is called the current-voltage curve. The purpose of maximum power point tracking is to generate a load resistance (of the solar module) to obtain the maximum power according to the output sampling of the solar module in each environment.

The shape factor of the solar cell, combined with its open-circuit voltage and short circuit current, will determine the maximum power of the solar cell. The shape factor is defined as the maximum power of the solar cell.

There are three different algorithms for tracking the maximum power point of off grid inverter: disturbance observation method, incremental conductance method, and constant voltage method. The first two methods are often called the "mountain climbing method". These methods are based on the curve of voltage to power. If it falls to the left of the maximum power point, increase the voltage, and if it falls to the right of the maximum power point, reduce the voltage.

This is some information related to the use of off grid inverters. The use of off grid inverters is also closely related to the quality of its products. If you need more information, please contact Shenzhen Sumry Electronics Co., Ltd.