The conversion efficiency of photovoltaic inverters requires high requirements, and the level of conversion efficiency will directly affect the amount of electricity generated by solar power generation systems during their lifespan. According to different models, the conversion efficiency of international first-class brand products can reach up to 98% or more. A high-power photovoltaic inverter can achieve a conversion efficiency of 98.7%, and the maximum power tracker (MPPT) efficiency can reach 99.9%.
The photovoltaic inverter has a long service life and high reliability. The design service life of photovoltaic power generation systems is generally around 20 years, so it is required that the design life of photovoltaic inverters should reach a high level. At the same time, if the photovoltaic inverter malfunctions, it will cause the photovoltaic power generation system to shut down, resulting in economic losses. Therefore, high reliability is an important technical indicator of photovoltaic inverters.
The DC voltage working range of photovoltaic inverters should be wide and meet the grid connection requirements. In practical applications, multiple solar cell modules are connected in series to obtain a higher DC voltage, which is input into the photovoltaic inverter after multiple sets of parallel connection. The combination of components with different powers, voltages, and series parallel schemes requires photovoltaic inverters to adapt to different DC voltage inputs. So the DC working voltage of the photovoltaic inverter should be wide to meet the different needs of customers. The current output at the same time should not cause any impact on the power grid and meet the grid connection requirements.