micro inverter for solar panels

Smart 50Hz / 60Hz Micro Grid Tie Inverter 500 Watt with Power Automatically Locked

Application:

1. it is a key device of power generation system such as PV power generation system, small power wind power generation system.

2. Smart Micro inverter optimized design for modularization modular power generation systems.

3. They can use with DC power supplies such as the mainstream solar modules, 18V, 24V and 36V monocrystal and/or Polycrystalline solar panels, small power wind generator as well as battery for converting into alternating current which suitable for feeding into utility grid.

4. Product is stable and reliable as well as high conversion efficiency. It is best choice for PV power generation systems and small power wind power generation systems

System Function                                             

• directly connected to the solar panels (do not need to connect the battery)

Using precise MPPT function, APL functions, the inverter automatically adjust the solar panels of maximum output power,simply connect the solar panel to the grid inverters. Do not need to connect the battery.

• AC 0 angle with high precision auto-detection

AC phase angle of 0 through isolation amplifier then input to the MCU for high-precision detection and analysis. The phase shift rate is less than 1%, thus achieve high-precision with phase modulation AC output together.

• Synchronous High-frequency Modulation

In the process of the grid, usually adapt the same phase angle in parallel. (ie, When the two-phase alternating current total is equal to 0.Use switch to combination the two AC fusion) and the product is rectified AC half-frequency AC to 100Hz first, then the machine use the high frequency current in the circuit and semi-100Hz frequency alternating current generated combination, to achieve high-frequency modulation.

• Pure Sine Wave Output

       Use SPWM directly to make pure sine wave output.

• Automatic Sensing Function Solar Luminosity

Use the latest luminosity perception operation technology. The different illuminate angle and intensity of the solar panel will produce different current output. Use advanced CPU to operate the different illuminance and the data can be directly displayed on the LCD. Then you can visually see the sense of the strength of the sun unit. Used more convenient.

• Power Automatically Locked (APL)

In different current fluctuations, we should use the MPPT function. When the MPPT function adjusted to the maximum power point, the product automatically powers locked in maximum power point, then made the output power more stable.

Installation instruction :

Please read the below notes carefully before installation:

A) Make sure the open voltage and operation voltage is in the range of 10.5-28V, and we recommend the 18V rated voltage solar panel or 24V battery.

B) Make sure the inverter’s  AC voltage and frequency is the same with power grid voltage and frequency.

C) Installation inverter in the low humidity and well-ventilated place to avoid the inverter damp and overheating, And clear the inflammable and explosive materials around.

E) Recommended to use 4AWG DC input cable that can handle more than 50A current.

F) DC input cable no more than 8M, because long DC cable will reduce the voltage from solar panel to inverter, then make some loss.

G) There must be a circuit breaker between solar power generation and power grid (show like the “control switch” in figure 1). And there will be no load before the circuit breaker.

H) Before connect all the connections, you must disconnect the utility power . After make sure the all connections are right then connect the utility power.

I) If you need to disconnect the mains switch when the solar power generation is in operation , you must disconnect the control switch first(show like the “control switch” in figure 1).

J) Avoid children touch or play the inverters, in order to prevent electric shock.

K) Non-professional do not disassemble the inverter, only qualified serviceman can repair it

Connection DC terminal:

Connect the solar panels positive terminal to inverter’s positive terminal, and negative to negative. And you must screw up the nut to avoid the bad contact

Connection of AC terminal:

Before connect the inverter’s AC cable to the socket, you must disconnect the utility power. Then put the AC cable which has holes terminal into the inverter’s 3 feet port and the pin terminal to the socket.  Please make sure both of the terminal are connect fastness to avoid bad contact.

Operation:

After all connection, first open the mains switch, then open the inverter. When the inverter’s green LED shows, it means the inverter start to work.

Several or many inverters used in parallel:

Trouble removal:

1) Red LED shows:

A) Check if the input voltage to inverter is low than 10.5V or higher than 28V.

B) Check it the AC cable connect to utility power correct or the utility power is disconnect.

2) No LED shows:

A, Check if the DC input voltage is in too low.

B, Check if the DC fuse is broken.

Why Is The Micro Inverter:

1. The transition from a centralized to a distributed inverter optimizes energy collection.
2. The converter module integrated into the solar panels can reduce installation costs.
3. Soft switch technology to replace hard-switching technology can improve efficiency and reduce heat dissipation.
4. From cottage industry to mass production, standardized design (hardware and software) to improve reliability and reduce costs.
5. Using a special capacitor (due to the high failure rate). Design requires a higher voltage to reduce the current, we use a special electrolytic capacitors.
6. The converter can be connected to the grid to eliminate the need for many battery applications. The high price of batteries, require maintenance, life expectancy is shorter.
7. Work required micro-inverter power increasingly smaller (only a few hundred watts), which can reduce the internal temperature and improve reliability.
8. Micro-inverter solar inverter system needs to deal with a lot of a particular power level, in order to increase production, thereby reducing costs.