Generally, the installation capacity of power plants is calculated based on the land or roof usage area. When calculating, consideration should be given to the tilt angle, bracket installation method, etc., in order to minimize the shadow blocking of the inverter and prevent it from being easily connected to the grid. The basic protection functions of the inverter include input overvoltage and undervoltage protection, input overcurrent protection, short circuit protection, overheat protection, and lightning protection; The grid connection protection includes: output overcurrent protection, output overcurrent protection, overcurrent and undercurrent protection, and anti islanding effect heat dissipation solution. The solution is mainly applied to large-scale centralized inverters. From the perspective of single-phase, household use has a lower rating, less heat dissipation, and is applied to households. The overload capacity of the inverter is generally related to the number of input channels of the machine and the maximum DC input power it can bear. The after-sales application speed is exceeded, and the ability to quickly recover power generation due to the occurrence of the inverter is directly related to the purchasing tips of the photovoltaic inverter

 1. Confirm how high-power inverters are suitable for installation in your photovoltaic power station

The installation capacity of a general power plant is calculated based on the land or roof usage area. When calculating, consideration should be given to the tilt angle, bracket installation method, etc., in order to minimize shadow obstruction as much as possible.

2. Check how many MPPT channels the inverter has and how many inputs

The number of MPPT channels in the inverter largely determines the power generation of a photovoltaic power plant, while the number of input channels in the inverter often determines whether a photovoltaic power plant is easier to design for distribution boards and saves more auxiliary materials such as cables.

3. Inverter power generation capacity

The power generation capacity of an inverter is related to many aspects such as heat dissipation, component performance, and fault rate. In terms of parameters, it mainly depends on efficiency and voltage range. The lower the lower the operating voltage range of the inverter, the earlier the inverter will start and shut down. The higher the operating voltage range, the stronger the inverter's ability to withstand peak power generation. When the light is stronger, it is not easy to derate or even shut down, and the operation is more stable.

4. Protection issues

The basic protection functions of grid connected inverters usually include: input overvoltage and undervoltage protection, input overcurrent protection, short circuit protection, overheating protection, and lightning protection; Grid connection protection includes: output overvoltage protection, output overcurrent protection, over frequency and under frequency protection, and anti islanding effect protection.

5. Cooling solution

At present, there are three common cooling methods in the industry: forced air cooling, natural cooling, and water cooling. Among them, water cooling is mainly used for large centralized inverters and is rarely used. From the perspective of inverters, single-phase inverters for household use have lower power levels, less heat dissipation, and are suitable for household use.

6. Overmatching ability

The overload capacity of inverters is generally related to the number of input channels of the machine and the maximum DC input power that can be borne. Currently, legitimate brand inverters are designed with a partial overload margin, usually around 1.1 times.

7. After sales service capability

At present, the domestic inverter industry needs to pay attention to the after-sales service response speed of inverter suppliers. Whether the inverter can quickly recover power generation after a malfunction is a major issue that directly affects the power generation of photovoltaic power stations.