Solar Water Pumping Inverter / System And Solar Pump Drive

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    Fully automatic system using variable speed drive compatible with AC, 3-phase, submersible and surface mount pumps, and high efficiency PMSM Pumps. The system is composed of a PV generator, a pump and a solar pump drive. Based on the design philosophy that it is more efficient to store water rather than electricity, there is no energy storing device such as storage battery in the system. The system is prepared to be combined with a elevated water storage, e.g. water tower or an uphill tank installation.

    Presentation
    ALFA Solar Water Pumping Solution is a fully automatic system designed to provide water at affordable cost for people with limited or no access to electricity. It uses the most advanced S300/3200 variable speed drive to regulate the speed of a 3-phase AC motor depending upon the solar energy available from the solar panel.

    How does it work ?
    An arrays of solar panels generates the power and voltage required for the SG300/3200 Solar inverter to drive the motor. The solar drive converts the DC voltage input to a 3-phase AC output with variable voltage and frequency. The MPPT algorithm of solar drive extracts maximum power available from the solar panels during the day and operates the motor at variable speed based on the power input to the drive. The frequency range in which the drive operates depends upon the motor speed, hydraulic system and the power available from the solar panel. As the sunshine varies during the day, power input to the drive varies and the Solar drive generates variable V/F ratio thus controlling the speed of the motor, which in turn regulates the pump impeller speed. Water Level Sensor is used only when the water is pumped to overhead tank. 
    Benefits
    • Pumping of water in for irrigation for drinking water supply in off grid areas, easy installation.
    • Farmer can cultivate multiple crops through out the year in off grid areas 
    • Farmer can save their time spent in collecting and transporting water.
    • Lower operation expense compared to diesel pumps 
    • Zero emission of green house gases.
    • Reduced load on national grid.

    Applications
    Irrigation of land, domestic water supply, fish farming, livestock, swimming pool, fountain, drip irrigation & sprinkler, industrial application, swimming pool…

    Features of solar pumping system


    System connection and commissioning.
    An enhanced version of ALFA Automation AC Drive( variable speed drive of motor speed and torque control), compatible with DC power and AC grid input.
    Note*: Only allow one power source input at a time.
    1. Connect DC power Positive ( P ) and Negative ( N ) terminals to input R, T terminals of drive.
    2. Connect output U, V, W terminals of drive to 3 phase AC pumps. ( Not drive for DC pumps and Single AC pumps).
    3.Connect water level sensor to drive if need water tank level detecting.
    4.Connect remote controller GPRS module ( option) if need remote monitor controlling function.
    5. IP54 solar pump drive cabinet customization make is available including( AC/DC switchover, AC and DC breaker..), or IP54 module also is available.

    Easy installation and commissioning.
    1.Dc voltage of solar arrays in serials need large than 1.15 times of Vmpp of drives.
    For example: For 4T series, recommend 540V*1.15=621V; For 2S series, recommend 311*1.15=357V. (Voc)
    2.The selecting power of solar arrays need large than 1.3 times power of total pumps.
    For example, 0.9kw above for 0.75kw pumps, 2.86kw above for 2.2kw pumps.
    3.Commissioning steps.( Please wait 30s after switching on for Voc detecting by iverter itself.

     Solar arrays module selecting

     

    Selecting Solar Arrays Matching Selecting
    Solar pumps inverter model  Maximum Input DC current  Solar arrays open circuit voltage specification 
    Open circuit voltage range
     Voc 21V±2V
    Open circuit voltage range Voc31V±2V Open circuit voltage range
    Voc 43V±2V
    Power±3WP Short circuit
    current 
    Series,
    parallel No. 
    Power±3WP Short circuit
    current 
    Series,
    parallel No. 
    Power±3WP Short circuit
    current 
    Series,
    parallel No. 
    Inverter rated current 
    General type 4T series : 350 to 800 VDC or 380 to 460VAC input, (MPPT 486 to 750VDC, Voc 620VDC)
    S300-0K7GB-4T 4.6A  30WP 2.75A  30*1                    2.3A 
    S300-1K5GB-4T 7A 60WP 3.48A  30*1                    3.7A 
    S300-2K2GB-4T 10A 90WP 5.5A  30*1                    5A
    S300-4K0GB-4T 17A 85WP 4.7A  28*2                    8.5A 
    S300-5K5GB-4T 23A          180WP 7.33A  19*2           13A
    S300-7K5GB-4T 32A          240WP 8.81A  20*2  200WP 7.32A  15*3  17A
    S320-011GB-4T 48A          180WP 7.33A  20*4  240WP 7.32A  15*4  25A
    S320-015GB-4T 64A          240WP 8.81A  20*4  240WP 7.32A  15*5  32A
    S320-018GB-4T 76A          240WP 8.81A  20*5  240WP 7.32A  15*6  38A
    S320-022GB-4T 80A          240WP 8.81A  20*6  270WP 7.32A  15*7  45A
    S320-030GB-4T 90A          240WP 8.81A  20*8  240WP 7.32A  15*10  60A
    General type 2S series : 150 to 450 V DC or 200 to 240 VAC input, (MPPT 280 to 375VDC, Voc 350VDC)
    S300-0K7GB-2S 7A 30WP 2.75A  17*2                    4A
    S300-1K5GB-2S 14A 60WP 3.48A  17*2                    7A
    S300-2K2GB-2S 20A 90WP 5.5A  17*2                    10A
    S300-4K0GB-2S 32A 90WP 5.5A  17*3                    16A
    Note: The required input solar panel voltage is 1.15 times of solar drive DC bus voltage.
    For example: For4T series, recommend 540V*1.15=621V; for 2S series, recommend 311*1.15=357V.
    The required power of solar arrays is 1.3 times of rated power of drives, shouldn’t less than 1.2 times of rated power of inverter. For example, 7R5G, the required power is 7500*1.3=9750w.
    The current of solar arrays selecting approximate to rated current of solar drive is acceptable. 

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