Whatsapp
The CSIVEI 18.5KW 3 Phase Solar Pump Inverter is a high-power solution for large-scale solar water projects. It supports both off-grid and grid-hybrid modes, automatically switching between solar, battery, and grid. Advanced MPPT with 99% efficiency, wide input voltage range (500-1000V DC). The drive features built-in PLC, multiple communication ports (RS485, Ethernet, CAN), and a 7-inch touchscreen option. Protection includes arc fault detection, ground fault monitoring, and pump dry-run protection. Rugged IP54 enclosure (optional IP65) for outdoor installation. Ideal for desert reclamation, reservoir pumping, and industrial water treatment. CSIVEI delivers turnkey solar pumping solutions.
| MODEL | |
| Input voltage | AC,1PH,220V(-15%)~240V(+10%) |
| AC,3PH,380V(-15%)~440V(+10%) | |
| Rated frequency | 50/60Hz |
| Frequency range | ±5%（47.5~63Hz） |
| Output Voltage | 0-Output Voltage |
| Output Frequency | 0.1~500Hz |
| Highest frequency | Vector control：0~500Hz |
| V/F control：0~500HZ | |
| Carrier frequency | 0.8KHz~8KHz |
| The carrier frequency can be automatically adjusted according to the load characteristics | |
| Input frequency resolution | Digital setting：0.01Hz |
| Simulation setting：Maximum frequency x 0.025% | |
| Control Method | SVC Open-loop vector control |
| V/F Open-loop speed control | |
| Starting torque | 0.5Hz/150%(SVC) |
| Speed range | 1:100(SVC) |
| Speed stability accuracy | ±0.5%(SVC) |
| Overload capacity | 150%Rated current：60s，170%Rated current：12s，190%Rated current：1.5s |
| Torque Increase | Automatic Torque Boost；Manual torque boost: 0.1%~30.0% |
| V/F curve | Three methods：1.Linear；2.Multifocal；3.Power-type V/F curve |
| V/F separation | 2 methods：Fully separated；Semi-detached |
| Acceleration and Deceleration Curve | Linear or S-curve acceleration and deceleration methods. Two types of acceleration and deceleration times, with a time range of 0.0~6500.0s |
| DC braking | DC braking frequency：0.00Hz~Maximum frequency |
| Braking time：0.0s~36.0s | |
| Brake operation current value：0.0%~100.0% | |
| Jog control | Jog frequency range: 0.00Hz to maximum frequency. Jog acceleration and deceleration time: 0.0s to 6500.0s |
| Built-in PID | It can conveniently achieve a process control closed-loop control system |
| AVR | When the grid voltage changes, it can automatically maintain a constant output voltage. |
| Torque Limiting and Control | “Excavator” features automatically limit torque during operation to prevent frequent overcurrent trips |
Designed for rural community water supply, this VFD powers pumps that lift water from boreholes, rivers, or reservoirs to elevated storage tanks or direct distribution networks. The system operates automatically: when solar power is sufficient, the pump fills the tank; when the tank is full, the drive enters sleep mode, preserving mechanical life. Ideal for village water kiosks, school water systems, and health clinic supply. The built‑in PID ensures constant pressure in elevated tanks, while the MPPT algorithm extracts maximum power from solar panels even on cloudy days. This solution provides clean, low‑cost water for drinking and sanitation without diesel or grid dependence.
Protecting the pump from damage is critical in solar water systems. The CSIVEI 18.5KW 3 Phase Solar Pump Inverter includes a comprehensive suite of pump-specific protections:
● Dry-run protection – monitors current, power, or optional flow sensor; stops the pump when water source is depleted and automatically retries after a settable interval.
● Pipe burst / low flow detection – detects sudden current drop indicating pipe rupture or leak, shuts down to prevent flooding.
● Over-current & overload protection – prevents pump from overheating due to sand, scaling, or bearing failure.
● Under-voltage & over-voltage shutdown – safeguards the drive and motor from unstable solar input.
● Anti-reverse irrigation – when pump stops, a check valve can be controlled to prevent water backflow that spins the motor backwards.
These protections extend pump life, reduce maintenance visits, and provide reliable water delivery in remote solar installations.
Q1: What cable size do I need between solar panels and the drive?
A: Cable size depends on DC current and distance. For a 18.5KW 3 Phase Solar Pump Inverter, typically 4‑10mm² copper cable is used for short distances. Use our cable sizing tool or consult a technician. Always use UV‑resistant, double‑insulated cables for outdoor runs.
Q2: Can I install the drive outdoors?
A: The standard IP20 enclosure requires indoor installation or a weatherproof cabinet. For outdoor mounting without an extra cabinet, order the optional IP54/IP65 enclosure. All versions have conformal‑coated PCBs to resist humidity.
Q3: Do I need a DC breaker between panels and the drive?
A: Yes, a DC rated circuit breaker or fused disconnect is mandatory for safety and code compliance. CSIVEI recommends a 2‑pole DC breaker sized at 1.25x the maximum DC current.
Q4: How do I connect the dry‑run protection sensor?
A: The drive has dedicated digital input terminals for a flow switch, pressure switch, or water level electrode. Connect the sensor’s NO/NC contacts; then set the corresponding parameter to “dry‑run protection”. The drive will stop and display a fault when the sensor triggers.
Q5: What grounding requirements does this drive have?
A: Proper grounding is critical. Connect the drive’s PE terminal to a dedicated earth ground using a copper conductor. Also ground the solar panel frames and pump motor. Failure to ground may cause electrical shock or drive malfunction.
A village of 300 households in East Africa had unreliable hand-pump wells. A CSIVEI solar pump VFD was installed with a 18.5KW 3 Phase Solar Pump Inverter, lifting water from a borehole to an elevated 50,000L tank.
Clean water available daily for 4 hours, serving all families.
No diesel or grid electricity required – zero operating cost.
Maintenance reduced to annual panel cleaning.
Women and children no longer walk long distances for water.
The system has run fault‑free for 3 years, transforming community health and economic activity.
Address
No. 3788, Liujiang Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province, China
Tel
If you have any enquiry about quotation or cooperation, please feel free to email us at sanchia@csivei.com or use the following inquiry form.Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
WhatsApp:8615705777705
