The pwm solar charge controller is a key component linking the photovoltaic array and the power grid. Its efficiency not only affects its own losses, but also affects the capacity selection and reasonable configuration of photovoltaic conversion devices and other equipment in the system. We mainly distinguish the quality of photovoltaic inverters from the following aspects:

1. Installation scale

According to the scale of the power station, choose different models and capacities for the selected pwm solar charge controller. Large-scale ground power stations generally use centralized inverters; while small-scale rooftop power stations, industrial parks, or photovoltaic power generation systems in public facilities are not large-scale, generally string inverters or micro-inverters can be selected.

2. Stability and reliability

In the cost structure of the photovoltaic system, the inverter only accounts for 11%, and the cost is not high. However, in the follow-up operation and maintenance, the after-sales problem of the inverter is about 50% of all the after-sales problems. It can be seen that choosing a safe , How important is a reliable inverter.

3. Efficiency

The efficiency of inverters of different brands is different. Among them, the efficiency of European and American inverters is the highest, while the European standard reaches 97.2%. The efficiency of other domestic inverters is below 90%. The efficiency of the inverter also affects the price difference. The higher the efficiency, the more expensive the price. The efficiency of the inverter is very important. The higher the efficiency, the less power is wasted on the inverter and the more power is used for appliances.

4. Load Type

When choosing an inverter, first of all, ensure enough rated capacity to meet the electrical power requirements under the maximum load. When the inverter is loaded with multiple devices, the selection of the inverter capacity should consider the possibility of several electrical devices working at the same time, that is, the "load simultaneous factor".