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Can I use mains or generator power to run the pump on cloudy day?

The controller does not have the input for mains or generator power but the pump can be powered by means of a DC power supply that can supply the controller the correct voltage and amperage for the pump to operate efficiently.

How far can I install the solar panels from the pump?

The Solar pumps we use work on low voltage so extending the cable too far will affect the performance and thicker cables need to be used to counter the volt drop.We would not recommend extending the cable more than 100-120m depending on the size and voltage of the pump. It's best to increase the cable between the controller and pump and keep the cables between the controller and panels as short as possible to get the best efficiency out of the pump.

Do these pumps use brushes like other DC pumps?

The motors that we use are AC low voltage motors which means that they do not work with brushes at all. The only wearable parts on the motors are the bearings and mechanical seals like normal AC motors.

Should I buy insurance for good with sea shipping?

We suggest our customer to insure the goods, to avoid any loss in transportation

What will be the discounts for my order?

During special sales promotions, most products have discounts when certain order quantity is met.     For detailed discount information, please consult our sales representatives.

What is your delivery time? If I need products very urgent ,how can I get it?

Shipped in 5-15 days after payment, and urgent order please check with our sales and who will offer a good delivery time for you according to your urgent request by express shipping.

How do you guarantee your quality?

Firstly, we do quality test during every process. And we use production instruction cards, when one process finished , the work will be signed on the production instruction cards.Secondly, we will collect all comments on our products from customers in time. And try our best to improving quality all the time.

Can the speed of the solar pump be adjusted?

Yes, our MPPT controller supports modifying the speed, if you need you can send me a video on how to modify the speed of the solar water pump,

Can I run this pump on an existing solar installation?

It is possible to run the pump directly off of a battery bank. You will need to make sure that the voltage of the battery bank falls within the input range of the controller.

How do I determine the number of panels needed for my solar pump?

The easiest way to determine this is to add 1.3 times on top of the pump wattage for minimum requirements and recommended would be 1.4 times. I.e. a 500w pump requires minimum 650w and recommended 700w to operate.

What is an open centrifugal pump?

Centrifugal water pumps use centrifugal force to pressurize and move water from the inlet to the outlet. A rotating set of vanes (called an 'impeller') is spun by the pump shaft. As water is forced through the impeller, rotational energy is transferred from the impeller to the water, which gains velocity and pressure through the centrifugal force applied and is flung from the impeller. The volute (a spiral-shaped case) funnels the now-pressurized water to the outlet. Image below shows clockwise rotation as viewed from the motor mound.Ningbo Guanghan Solar Pump Industry is a factory specialized in manufacturing solar submersible pumps and solar surface pumps. The head office was established in 1989 in Daxi Town, Wenling City, the hometown of water pumps in China, and a branch factory was established in Jiangshan Town, Ningbo City in 2019. It is located near the highway intersection, very close to Ningbo Port and Shanghai Port, and the transportation is very convenient.

What is the permanent magnet synchronous motor

A permanent magnet synchronous motor (PMSM) uses permanent magnets embedded in the steel rotor to create a constant magnetic field. The stator carries windings connected to an AC supply to produce a rotating magnetic field. At synchronous speed the rotor poles lock to the rotating magnetic field. Permanent magnet synchronous motors are similar to brushless DC motors.Because of the constant magnetic field in the rotor these cannot use induction windings for starting. These motors require a variable-frequency power source to start.The main difference between a permanent magnet synchronous motor and an asynchronous motor is the rotor. Some studies seem to indicate that NdFeB permanent magnet synchronous motors are around 2 percent more efficient than the highest-efficiency (IE3) asynchronous motors—using the same stator laminations and similar variable-frequency speed controllers.Permanent magnet motors have been used as gearless elevator motors since 2000.Ningbo Guanghan Solar Pump Industry is a factory specialized in manufacturing solar submersible pumps and solar surface pumps. The head office was established in 1989 in Daxi Town, Wenling City, the hometown of water pumps in China, and a branch factory was established in Jiangshan Town, Ningbo City in 2019. It is located near the highway intersection, very close to Ningbo Port and Shanghai Port, and the transportation is very convenient.

What is your method of samples transportation?

We ship samples by international express such as FEDEX, UPS, DHL, TNT, EMS, etc.

How about your capacity?

We can produce 400-500pcs dc solar water pumps a day, which can be a good guarantee that we will deliver within the stipulated time.