1. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com www.veichi.org www.veichi.org Shenzhen & Suzhou China AC Drive/ Frequency Inverter/ AC Servo Drive/PV Inverter/Intelligence Robot/PLC/HMI/… Top Brand Veichi SI10 Solar Pumping InverterSolar Pumping Inverter  High efficiency  MPPT, CVT  High reliability  Easy operation  First solar pumping controller developed company in China

2. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com INTRODUCTION OF SOLAR PUMPING SYSTM Solar Pumping systemSolar Pumping system becomes more and more popular, it can be applied to daily ( underground water), agriculture irrigation, forestry irrigation, desert control, pasture animal husbandry, water supply for islands, wastewater treatment engineering, and so on. In recent years, with the promotion of the utilization of new energy resources, solar pumping systems are more and more used in municipal engineering, city center squares, parks, tourist sites, resorts and hotels, the landscapes and Fountain systems in the residential areas. This system is composed of a solar array, a pump and solar pumping inverter. Based on the design philosophy that it is better to store water than electricity, there is no energy storing device such as store battery in the system. The solar array, an aggregation of many solar modules connected n series and parallel. Absorbs sunlight radiation and converts into electrical energy, providing dynamical water for the whole system. The pumping inverter controls and adjusts the system operation and converts the DC produced by solar array into AC to drive the pump, and adjust the output frequency in real-time according to the variation of sunlight intensity to realize the maximum power point tracking( MPPT). The pump, drive by 3-phase AC motor, can draw water from the deep wells or rivers and lakes to pour into the storage tank or reservoir, or directly connect to the irrigation system, fountain system, ect. According to the actual system demand and installation conditions, different types of pump such as centrifugal pump, axial flow pump, mixed-flow pump or deep- well pump can be used. Applications 1.Ground water lowering, 2.Irrigation systems 3.Industrial Application 4.Drip irrigation& sprinkler 5.Tank/ cistern filling 6.Wildlife refuge 7.Rural water supply for ranches, cabins, and cottages 8.Fountains. Veichi solar pumping VFDs

3. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com VEICHI-SI10 Variable Frequency Drive is positioned in environmental-friendly and economical PV market, the product is applicable to PV pumping system, replaces water storage with electric storage and needs no battery modules. The direct current generated by solar 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. Specification: 200 -400VDC input, 220VAC output, 0.75 to 3.7kw 350-780VDC input, 380VAC output, 0.75 to 160kw. Descriptions and Features:  Internal diagnostics will tolerate a lower input voltage  Whenever possible, the controller attempts to regulate the pump load in a manner that optimizes for maximum power transfer from the solar array.  The drive manually switches to AC backup power( when available) if the DC primary source is unable to support pump operation  TI DSP technology and Infineon PIM design, high quality.  MPPT function is available, CVT function also is OK. Veichi SI10 Solar Pumping Frequency Inverter An easy to interface is provided to enhance configurability and enable remote system monitors  A four-digit seven-segment display provides a detailed indication of systems status.  Two line display keypad is options  Built in RS485 ports through 7.5kw, laptop software control is available Protection features Electronic monitoring gives the controller the capability to monitor the system and automatically shut down in the even of: Dry run conditions- with smart pump monitoring, High voltage surge, Low input voltage, Open motor circuit, Short circuit, Over heat, Earth fault, Phase missing… TYPE CODE SI10-D3/D5-0XXG ( support MPPT &CVT) SI10-S2/T3-0XXG ( only support CVT) S2/D3= 200V-400VDC in put or 220V-240V AC output T3/D5= 350V-780VDC or 380V to 480V AC output

4. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com Recommended MPPT voltage range 220~400VDC for 220VAC output 1.5Kw to 3.7kw. 350~780VDC, for 380VAC output 1.5kw to 11kw. Bigger power above 15kw only with CVT control. 11kw to 160kw. Recommended input voltage 350V DC for 220VAC motor output 620V DC for 380V AC motor output MPPT efficiency Up to 97% Input channel 0-10V, 0/4-20mA Maximum DC power input400VDC for 220AC output /780VDC for 380V AC ouput Rated output voltage 3-phase, 0-220VAC 3-phase 0-380VAC Output frequency range0~50Hz Max efficiency of the machine97% Ambient temperature range(G-type inverter with water pump) Cooling method Air cooling Protection degreeIP20 Running modeMPPT or CVT AltitudeBelow 1000m; above 1000m, derated 1% for every additional 100m. Standard AC input backup circuit CE Design based on Veichi AC60 series, more specification please refer to AC60 general purpose inverter manual Technical Specification

5. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com Solar pumping system Solar panel arrays Veichi Solar pumpin g VSD pumps VSD Solar panel arrays Pumping range Position pump off Sealed cable clamp Cable Position pump on Position pump off range The system is activated when terminal COM, FWD connected on, stop while off The system also control by Terminal X4 and COM ON/ON state When connect on, the system stop. System wiring diagram

6. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com Specification data of solar pumping inverter.( Red mark means have MPPT function in hardware and software. The rest type only have CVT function. ( MPPT also is available should quantity)

7. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com Commissioning Input connecting with R T for DC input, output terminals U.W.V for connection motor. Suggest solar panel MPPT voltage range 480V~560V. Check wiring before power on. Check parameter C-21: input voltage; C-25: controller rated power whether right. Check parameter E-56: motor rated voltage; E-57: motor rated current; E-58: motor rated frequency whether this parameters fit to nameplates. Perform JOG first to see the direction of motor running if correct. If yes, process to FWD Related control parameters: E-02: Frequency reference giving selection (10: solar pump control) E-13: ACC time (20S~40S) E-14: DEC time (3S~10S). If set it too big, make pump output power reduce too slowly. While there is cloud, the solar panel power is not enough, make bus voltage reduce, inverter will enter sleep state. If set it too small, make pump output power reduce too quickly. Pump will shake. Please configure motor parameters as name plate of m E-56, Motor rated voltage, E-57, motor rated current E-58, rated frequency of motor E-59 rated speed of motor. Solar pumping special purpose parameters. H-32: Lowest run frequency (20HZ) H-33: Lowest run frequency duration (10.0S) H-34: Stop wait time (30.0S) H-35: Automatic sleep voltage ( Vmp*60%) H-36: Renew voltage in dormancy ( Vmp*90%) H-37: Max MPPT voltage setting (Vmp* 105% ） H-38: Min MPPT voltage setting (Vmp*85% ） H-39: MPPT voltage search interval (0.2 S) H-40: MPPT voltage step length （ ranged 2-10V, 3.7kw5V, 5.5kw: 6V 7.5kw: 6/8V ） H-41: MPPT sample cycle (0.03S~0.05S)

8. Top manufacturer of AC Drive in China! Creative Technology, Service Leading! www.veichi.com