Product Name:NFD Solar inverter for PV pump
Category:Frequency Inverter
Positioned in environmental-friendly and economical PV market, the product is applicable to PV pump system,replaces water storage with electric storage and needs no battery modules. The direct current generated bysolar modules is input to the inverter and then converted into the alternating current to drive various pumps directly. Additionally, the output frequency is adjustable in real time according to sunlight intensity change.

Input voltage,V
Power range, кW
220/ single phase
0.4 - 1.5
380 / 3 phase
0.75-  22


  In order to meet the needs of various Pumping applications, series NFD Solar water pump controller uses the the maximum power tracking and the motor drive technology which has been long-tested to maximize the output power of the Solar module, and it can support both the DC input and AC input.

 When the sunlight is not strong enough, this controller can be switched into the single-phase AC input or three-phase AC input just like the electric generator or battery. It offers the functions of trouble detection, motor soft start and speed governing, you can use it once you open it and the installment is very convenient.

Technical features of NFD solar inverter

Item  Series NFD
Main control method Control Method V/F control, Space vector control.
Output Frequency Range 0400.0Hz
Carrier frequency Setting 015kHz
Frequency Setting Resolution Digital input: 0.1Hz
Analog input: 0.1% of max. frequency
Accuracy of output frequency 0.1Hz
Overload Type G: 150% rated current in 60s; 180% rated current in 3s.
Type P: 120% rated current in 60s; 150% rated current in 3s.
Torque control accuracy Auto boost; customized boot 0.0~20.0%
V/F control Can be arbitrarily set line V/F
PLC, Multi-speed operation Internal PLC or input terminals able can be set 16 section 
Internal PID it realizes process-controlled closed loop control system easily.
Voltage 0220VAC; 0380VAC
Acceleration and deceleration time settings 0999.9s Respectively provided acceleration and deceleration time
Communication methods  RS -485
Operation Running command channel  Operation panel, control terminal, Seriel communication port 
Frequency source Digital setting, analog voltage setting, analog current setting, pulse setting and serial communication port setting.
  Input terminal six digital input terminal; two analog input terminal: one just support input voltage 010V (FIV), other support input current 420mA (FIC)
Output terminal one digital output terminal ( M01); one relay output terminal ( RA, RB, RC)
one analog output terminal, support output voltage 010V (FOV)
 Keyboard   LED screen display parameters
  Protection function Motor short-circuit detection at power-on, input/output phase loss protection, over current protection, overvoltage protection, under voltage protection, overheat protection and overload protection.
Environment Installation location Indoor, free from direct sunlight, dust, corrosive gas,combustible gas, oil smoke, vapour, drip or salt.
Altitude Lower than 1000 m
Ambient temperature  -10°C 40°C (de-rated if the ambient temperature is  between 40°C and 50°C)
Humidity Less than 95%RH, without condensing
Vibration Less than 5.9 m/s(0.6 g)
Storage temperature  -20°C60°C
Class protection IP20

 NFD Solar inverter for PV pump

Mainly used in the project of water diversion for the planting and protecting of the river water soil losing. Normally solar energy is widely applied for those region  where is no power or power unstable. The system can be adapted into the  irrigation for the Economic crops (Barren mountain forest ), water supply for the Desertification control of the natural ecological protection zone. We can using the system to provide the living water for the region where is lack of electricity in remote mountainous areas, farms, schools, hospitals, factories and household.
Widely used in desert landscaping, desert control, agricultural irrigation, domestic water supply, urban water, gas pump systems, water purification systems, water desalination and so on.

The series NFD AC solar pumping system mainly consists of PV array, mounting system, combiner box, NFD solar pump controller, submersible/surface AC pump, reactor , liquid level switch and water tank, shown as Figure 1.

This system does not have storage batteries, and it is completely powered by solar energy, thus realizing a cost-effective purpose. 

An appropriate water tank can be prepared to store water for later use.
High-efficient AC submersible/surface pump is adopted for the system, thus satisfying different requirements.

The system is characterized by Maximum Power Point Tracker technology, regulating the work of the pump automatically and realize the maximum generated energy for the system.

Automatic control is adopted for the system such as: automatic start-up and shut-off respectively in the morning and evening, automatic shut-off for full tank and water shortage in the well. 

Protection measures are taken for the rotation jam of the pump, 3-phase equilibrium etc. thus prolonging the service lifetime of both the pump and controller.

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