Solar Pump Inverter

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Power inverter for converting DC power from solar panel into AC power to control water pump

Solar pump inverter is an important component of the photovoltaic pump system. Different from traditional AC water pump application systems, solar pump inverter converts the DC output from the solar panel array into AC to drive the water pump. With variable frequency drive (VFD) design, it allows to adjust the output voltage and frequency in real time according to the change in sunlight intensity, achieving maximum power point tracking and maximizing the utilization of solar energy.

Applications

Solar pump systems are widely used in domestic water supply, agricultural irrigation, desert control, grassland animal husbandry, island water supply, water treatment projects, etc. They can also be used in landscape fountain systems in municipal engineering, urban squares, hotels, residential communities, and other places.

Components of Solar Pump System

The solar pump system mainly consists of four parts: solar panel array, solar pump inverter, three-phase AC water pump, and water storage device.

System Diagram

Features

Solar pump inverter adopts high-efficiency IPM intelligent power modules from Mitsubishi, with high reliability and long service life.
solar pump inverter uses dynamic VI maximum power point tracking (MPPT) control method and optimized SVPWM; offering faster response speed, and a conversion efficiency of up to 99.9%.
Variable frequency drive (VFD) design allows for adjusting the output frequency in real time according to the change in sunlight intensity to control the motor speed, greatly improving efficiency.
The solar pump inverter system runs automatically without the need for manual operation.
LCD display function allows for viewing and setting various operating parameters.
Optional RS485 communication interface enables remote data monitoring.
Powerful protection functions, such as undervoltage, overvoltage, DC overcurrent, overload, short circuit, anti-dry burning, anti-overflow and dry pumping, blockage protection, etc.
This power inverter has passed EU CE (EMC, LVD) certification.

Specifications

Model	Adapted pump motor		Recommended PV input power	Max. DC input voltage	MPPT tracking voltage	Rated output current	Output frequency
Model	Rated power	Rated voltage	Recommended PV input power	Max. DC input voltage	MPPT tracking voltage	Rated output current	Output frequency
SPI-3700W	3.7kW	380～440V	4.8kW	850V	500～850V	7A	0～50 (60)
SPI-5500W	5.5kW	380～440V	7kW	850V	500～850V	10A	0～50 (60)
SPI-7500W	7.5kW	380～440V	10kW	850V	500～850V	14.5A	0～50 (60)
SPI-11kW	11kW	380～440V	14kW	850V	500～850V	21A	0～50 (60)
SPI-15kW	15kW	380～440V	20kW	850V	500～850V	28A	0～50 (60)
SPI-18kW	18kW	380～440V	24kW	850V	500～850V	33A	0～50 (60)
SPI-25kW	25kW	380～440V	33kW	850V	500～850V	46A	0～50 (60)
SPI-30kW	30kW	380～440V	39kW	850V	500～850V	55A	0～50 (60)
SPI-37kW	37kW	380～440V	48kW	850V	500～850V	68A	0～50 (60)
SPI-45kW	45kW	380～440V	59kW	850V	500～850V	82A	0～50 (60)
SPI-55kW	55kW	380～440V	72kW	850V	500～850V	102A	0～50 (60)
SPI-75kW	75kW	380～440V	98kW	850V	500～850V	137A	0～50 (60)
SPI-90kW	90kW	380～440V	117kW	850V	500～850V	164A	0～50 (60)
SPI-110kW	110kW	380～440V	143kW	850V	500～850V	204A	0～50 (60)
SPI-132kW	132kW	380～440V	172kW	850V	500～850V	240A	0～50 (60)
SPI-150kW	150kW	380～440V	195kW	850V	500～850V	274A	0～50 (60)
SPI-200kW	200kW	380～440V	260kW	850V	500～850V	364A	0～50 (60)