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When cloudy days reduce the efficiency of solar panels, you might wonder if it's possible to use mains or generator power to run an AC/DC solar pump. Let's explore this option and understand the alternatives available to ensure uninterrupted operation even when solar energy is limited. AC/DC solar pumps are designed to be powered by solar energy, but during cloudy days or when solar energy is insufficient, using an alternative power source can be a viable solution. Here are some factors to consider before opting for mains or generator power: 1. Availability of Mains Power: If your location has access to mains power, you can connect your AC/DC solar pump to the grid and use it as a backup during cloudy days. This way, when solar energy is insufficient, you can switch to mains power to continue running the pump. However, it's important to note that using mains power as a backup may increase your energy costs as you'll be consuming electricity from the grid. 2. Generator Power as a Backup: In areas where mains power is not available or unreliable, using a generator can provide an alternative solution. You can connect your AC/DC solar pump to a generator to supply the necessary power during cloudy days or when solar energy is limited. Ensure that the generator you choose has the capacity to meet the power requirements of your pump system. Consider factors such as the generator's power output, fuel availability, and maintenance requirements before relying on it as a backup power source. 

Installing solar panels to power a pump can be a cost-effective and environmentally friendly solution. The distance between the solar panels and the pump is an important factor to consider for efficient and reliable operation. Let's explore the optimal distance and other key considerations when determining the installation location for your solar panels. Optimal distance:Ideally, the solar panels should be installed as close to the pump as possible to minimize energy losses due to long cable runs.The recommended maximum distance between the solar panels and the pump is typically around 100 to 200 feet (30 to 60 meters). However, this may vary depending on factors such as the pump's power requirements and the type of wiring used.Power loss considerations:The longer the distance between the solar panels and the pump, the greater the power loss due to resistive losses in the cables.Thicker cables with lower resistance can help minimize power loss over longer distances. Using high-quality cables specifically designed for solar applications is crucial.If the distance between the solar panels and the pump exceeds the recommended limit, consider using power optimizers or voltage boosters to compensate for the power loss.Voltage drop:Voltage drop occurs when the voltage decreases as it travels through the cables. Excessive voltage drop can affect the pump's performance and efficiency.To minimize voltage drop, it's important to select the appropriate cable size based on the distance and power requirements of the pump. Mounting considerations:Ensure the solar panels are installed in a location that receives optimal sunlight throughout the day. Shading from nearby trees, buildings, or other obstructions can reduce the panel's efficiency.

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.

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

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

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.

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.

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,

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.

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.

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.

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.

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

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.