Products

WLD280

Suitable for solar pumping systems, agricultural irrigation, remote water supply and applications requiring PV-based pump control with protection functions.

product details

Product Overview

WLD280 is a solar photovoltaic pump controller for PV water supply systems. It supports DC photovoltaic input and AC power input, drives three-phase pump motors and provides water level signal detection for wells and reservoirs.

The controller is suitable for solar pumping systems, agricultural irrigation, remote water supply and applications requiring PV-based pump control with protection functions.

Key Selling Points

Supports photovoltaic DC input and AC power input.
220V class supports DC220V to DC370V or AC220V +/-15%.
380V class supports DC420V to DC720V or AC380V +/-15%.
Water level detection terminals are provided for wells and reservoirs.
Keypad supports run/stop, parameter setting, monitoring display and fault reset.
Fault protection includes over-current, over-voltage, DC bus under-voltage, motor overload, controller overload, phase failure, IGBT overheat and water shortage.

Core Parameters

Item	Details
Voltage, 220V class	DC220V to DC370V or AC220V +/-15%
Voltage, 380V class	DC420V to DC720V or AC380V +/-15%
Power range, 220V class	0.75kW to 55kW
Power range, 380V class	0.75kW to 200kW
Rated output current range	220V: 4.5A to 210A; 380V: 2.1A to 380A
Motor output	Three-phase AC output through U/V/W terminals
Default upper frequency	50.00Hz
Default lower frequency	30.00Hz; shutdown when operating frequency falls below this value
Default restart delay	10.0s after power on
External dimension range	Varies by power, from about H186 x W126 x D163.8mm to H1270 x W503 x D362mm

Model Coverage

Model / Voltage Class	Power Range	Notes
WLD280-2001 to WLD280-2075	0.75kW to 55kW	220V class
WLD280-4001 to WLD280-4270	0.75kW to 200kW	380V class

Interface and Control

Main circuit terminals include AC input, DC input, motor output and grounding terminals according to the model power class.
DI1 and DI2 are well water-level detection signal inputs. If only one well signal is used, DI1 and DI2 should be connected together.
DI3 and DI4 are reservoir water-level detection signal inputs. If only one reservoir signal is used, DI3 and DI4 should be connected together.
COM is the input common terminal for water-level detection signals.
Run, stop/reset, enter, programming and shift keys support basic commissioning and operation.

Application Scenarios

Solar photovoltaic water pumping.
Agricultural irrigation.
Reservoir and well water supply.
Remote pumping systems using PV array power with optional AC debugging or backup power.

Installation and Use Notes

The pump must not dry-run without water or liquid medium.
Before starting, ensure the pump is filled with water or other liquid.
Wiring must be performed by qualified electrical personnel after the power is off.
If there is no protection diode at the input bus, do not close the PV array switch and power grid switch at the same time.
When switching power source mode, follow the manual’s power-on sequence and wait for controller discharge where required.

FAQs

What is WLD280 for? ▶

WLD280 is a solar pump controller that directly drives a suitable three-phase pump from solar power. It is for water-pumping systems planned around available sunlight and the pump’s work.

Does WLD280 need batteries? ▶

No. Normal solar pumping with WLD280 does not require batteries. Store water in a tank for later use when that fits the system’s needs.

Will the pump run on a cloudy day? ▶

It can run when available solar power is sufficient, but pump flow changes with sunlight. In weak light, the controller can enter sleep and resume as conditions improve.

Can WLD280 pump water at night from solar power? ▶

Solar power alone cannot drive the pump at night. Plan water storage for night-time use, or use a properly designed alternative power source.

Can WLD280 switch to grid power automatically? ▶

Automatic changeover requires the optional WLD280-PV/ACX changeover box. It does not happen with the controller alone. Confirm the complete design and matching equipment before installation.

How many solar panels do I need? ▶

There is no single panel count for every installation. Select the array from the pump requirements and the controller’s permitted input range, using the panel data and local solar conditions.

Can the system stop when a tank is full? ▶

Yes. Water-level control can stop the pump when a tank is full if the needed sensor or switch is installed and set up correctly.

Does WLD280 protect against dry running? ▶

Yes. Dry running means a pump runs without enough water. WLD280 provides dry-running protection when the needed water-level sensing arrangement is installed and set up.

Why is the pump not delivering water? ▶

Check the available sunlight, water source, pump and pipework condition, and any displayed fault. Do not keep restarting without diagnosis; have the installation checked if the cause is unclear.

What maintenance does a solar pumping system need? ▶

Keep the solar panels, pump, water source, and pipework in good condition, and inspect them if performance changes. Have trained personnel handle electrical or controller work.