iMaster
Solar Pump Inverter
The iMaster Solar Pump Inverter delivers efficient and reliable solar water pumping with a power conversion efficiency exceeding 99%, adapting seamlessly to changing weather conditions. It operates dependably in harsh environments, including depths reaching 200 meters. Moreover, an optional kit enables automatic switching between solar and grid power to maintain a continuous water supply. It supports multiple motor control techniques, torque boost, and slip compensation for rapid response. Key features include accurate speed control, a wide voltage input range (200V-440V), conformal coating for environmental protection, RS-485 MODBUS communication, and compatibility with an external keypad.
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Main Features
  • The integrated maximum power point tracking (MPPT) algorithm guarantees that the solar power tracking efficiency exceeds 99%, thereby optimizing the performance of solar power conversion.
  • Adjusts to variations in weather conditions, thereby preventing system shutdowns commonly experienced by traditional pumps during abrupt overcast periods.
  • Strong anti-interference capabilities to reliably operate even at a well depth of 200 meters.
  • Suitable for areas with inadequate power supply and various harsh environments.
  • With an external switching kit, the inverter can automatically switch between PV input and grid input, thereby fulfilling the continuous water supply demand for 24 hours per day.
  • Designed to control asynchronous AC induction motors.
  • V/F Control, Sensor-less Vector Control (SVC), and Feedback Vector Control (FVC) are selectable.
  • Automatic torque increase and slip adjustment.
  • Rapid acceleration and deceleration capabilities.
  • Delivers 150% torque at 0.5Hz.
  • Offers accurate speed control within 0.5%.
  • Supports a wide input voltage range from 200V to 440V.
  • Features conformal coating for durability in harsh conditions.
  • Includes built-in RS-485 MODBUS communication.
  • Comes with a standard potentiometer and supports an external keypad.
General
CAPACITY
iMaster Solar Pump Inverter 0.75-37KW
INPUT
Frequency Range
iMaster Solar Pump Inverter ±5% (47.5 ~ 63Hz)
Input Voltage
iMaster Solar Pump Inverter 450VDC for 1PH
Rated Frequency
iMaster Solar Pump Inverter 50/60 Hz
OUTPUT
AC Voltage Regulation (Batt. Mode)
iMaster Solar Pump Inverter 0 ~ Input Voltage
Surge Power
iMaster Solar Pump Inverter 0.1 ~ 500Hz
Efficiency (Peak)
iMaster Solar Pump Inverter Please refer to Rated Parameter table
Transfer Time
iMaster Solar Pump Inverter Please refer to Rated Parameter table
ENVIRONMENT
Noise Level
iMaster Solar Pump Inverter 50dBA max.
Storage temperature
iMaster Solar Pump Inverter -20°C ~ 60°C
Operation temperature
iMaster Solar Pump Inverter -10°C ~ 50°C (If temperarture is higher than 40°C, the output capacity will be derated 1% per 1°C increase)
Storage humidity
iMaster Solar Pump Inverter ＜95%RH
Operation humidity
iMaster Solar Pump Inverter ＜95%RH
STANDARD
Safety
iMaster Solar Pump Inverter Standards:IEC 61800-5-1
BASIC PARAMETERS
V/F separation
iMaster Solar Pump Inverter V/F control: 0 ～ 500Hz
Highest frequency
iMaster Solar Pump Inverter Vector control: 0 ～ 500Hz
Carrier frequency
iMaster Solar Pump Inverter 0.8KHz ~ 8KHz;Adjusted automatically according to the load characteristics
Input frequency resolution
iMaster Solar Pump Inverter Digital setting: 0.01Hz; Analog setting: max. × 0.025%
Control mode
iMaster Solar Pump Inverter Open-loop vector control (SVC) ; V/F control
Starting torque
iMaster Solar Pump Inverter 0.5Hz/150%（SVC）
Adjustable speed ratio
iMaster Solar Pump Inverter 1：100（SVC）
Speed control accuracy
iMaster Solar Pump Inverter ±0.5%（SVC）
Overload capability
iMaster Solar Pump Inverter 150% of rated current: 60 seconds ; 170% of rated current: 12 seconds ; 190% of rated current: 1.5 seconds
Torque boost
iMaster Solar Pump Inverter Auto torque boost; Range of manual torque boost 0.1%~30.0%
V/F curve
iMaster Solar Pump Inverter Three types: Linear, Multi-point, square curve (1.2 power, 1.4 power, 1.6 power, 1.8 power, 2 power)
Acceleration and deceleration time
iMaster Solar Pump Inverter Linear and S-curve acceleration and deceleration modes available. The range of acceleration and deceleration time is 0.0~6500.0s.
DC braking
iMaster Solar Pump Inverter Braking frequency: 0.00Hz ~ Maximum frequency Braking time: 0.0s~36.0s Braking current value: 0.0%~100.0%
JOG control
iMaster Solar Pump Inverter JOG frequency range: 0.00Hz ~ Maximum frequency (5Hz in default). JOG acceleration and deceleration time: 0.0s~6500.0s.
Built-in PID
iMaster Solar Pump Inverter Simplify the establishment of a closed-loop control system
Automatic voltage regulation (AVR)
iMaster Solar Pump Inverter Keep the output voltage in stable when the grid voltage fluctuates.
Stall prevention from overvoltage and overcurrent
iMaster Solar Pump Inverter The current and voltage are limited automatically during operation to prevent frequent tripping due to over-current and over-voltage.
Rapid current limit
iMaster Solar Pump Inverter Reduce the risk of over-current faults to keep VFD operated normally.
Torque limit and control
iMaster Solar Pump Inverter Limit the torque automatically during operation to prevent frequent tripping due to over-current.
Braking unit
iMaster Solar Pump Inverter Built-in braking unit for 22KW and below models
DISPLAY BUTTONS
Protective function
iMaster Solar Pump Inverter Motor short-circuit detection at power-on, output phase loss protection, over-current protection, over-voltage protection, under-voltage protection, overheat protection, overload protection and etc.
Key lock and function selections
iMaster Solar Pump Inverter It allows users to partially or fully lock the keys or define operated range for partial keys to prevent misoperation
Keypad
iMaster Solar Pump Inverter Standard keypad
SPECIAL FEATURES
Deceleration to stop
iMaster Solar Pump Inverter In case of instantaneous power drop, the load feedback energy is used to compensate the voltage drop to maintain the inverter’s normal operation over that short period.
Rapid current limit
iMaster Solar Pump Inverter Reduce the risk of over-current faults to keep VFD operated normally.
Timer control
iMaster Solar Pump Inverter Setting range: 0.0Min ~ 6500.0Min
Communication
iMaster Solar Pump Inverter Modbus
INPUT/OUTPUT
Command source
iMaster Solar Pump Inverter Operation panel, control terminal and serial communication port.
Frequency source
iMaster Solar Pump Inverter Digital setting, Analog voltage setting, Analog current setting, Pulse setting and Serial port setting.
Auxiliary frequency source
iMaster Solar Pump Inverter 5 options to provide flexible auxiliary frequency fine-tuning and frequency synthesis.
Input terminals
iMaster Solar Pump Inverter 5 digital input terminals, one of which supports high-frequency pulse input up to 50kHz (only 4 digital input terminals available for MINI version) 1 analog input terminal supporting 0 ~ 10V voltage input or 0 ~ 20mA current input 1 rotary potentiometer analog input
Output terminals
iMaster Solar Pump Inverter 1 high-speed pulse output terminal supporting 50kHz step-wave signal output 1 relay output terminal 1 analog output terminal supporting 0~20mA current output or 0~10V voltage output
Brochure Brochure
Manual iMASTER
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