To optimize the efficiency and reliability of solar power generation system, a relatively new method is to use micro-inverters connected to each solar cell module. Each solar cell is equipped with a single micro-inverter, which enables the system to adapt to changing loads and weather conditions, thus providing the best conversion efficiency for a single solar cell and the whole system.
The concept of micro-inverters has a long history, but it did not attract people’s attention at first. In recent years, with the development of solar power technology and technological progress, micro-inverters are very attractive.
The photovoltaic power generation system with micro-inverters can simplify wiring, which means lower installation costs, higher efficiency of the solar power generation system, and shorten the time required to recover the initial investment.
Many chinese manufacturers of solar on grid inverters are mainly engaged in the development of high-power centralized on grid inverters. With the increasing popularity of domestic and foreign micro-inverters market, many manufacturers have begun to develop micro-inverters. The differences between micro-inverters and traditional inverters are as follows.
1.Inverter has low input voltage and high output voltage. The output voltage range of a single solar cell module is generally 20 to 50 V, while the peak voltage of the grid is about 311 V (220 VAC) or 156 V (110 VAC). Therefore, the output peak voltage of the micro-inverters is much higher than the input voltage, which requires the micro-inverters to adopt the inverters topology with step-up and step-down conversion function. The centralized inverters are generally buck converters, which usually adopt bridge topology. The peak voltage of the output AC side of the inverters is lower than that of the input DC side.
2.The power is small. The power of a single solar cell module is generally between 100W and 300W. The micro-inverters are directly matched with a single solar cell module, and the power level is between 100W and 300W. The traditional centralized inverters generate high enough power through series and parallel combination of several solar cell modules, and their power level is generally over 1 kW.
REVO Series Wall Mounted Integrated Solar Hybrid Grid Tie Inverter With Built-in MPPT Solar Controller
1.Touch screen display.
2.Output power factor PF=1.0
3.On grid with energy storage.
4.Energy generated record, load record, history information and fault record.
5.Language and time setting.
6.Structure with dust filter.
7.AC charging and AC output time setting.
8.Charging voltage and charging current timing.
9.External wi-fi device optional.
10.Parallel operation with up to only available for.
11.Smart battery charger design.