How to make a solar-powered pump for watering your garden

I once bought a centrifugal pump for watering my garden in order to pump water from a nearby well. And I thought, why run a 220 V network to the well and waste electricity when you can convert the pump to low-voltage power and power the entire structure from solar panels or a battery.
You can take such a pump with you anywhere and pump water even from a well, even from the nearest river or lake. And what is most important: the pump will not lose its functionality and can be powered from either 220 V AC or 24 V DC.

Modification of the centrifugal pump

Here is the 380 W surface centrifugal pump itself, clamped in a vice.

Remove the protective grille and impeller.

Next we will connect to the shaft; for this we need to prepare the driveshaft. You can easily buy it at any car dismantling site. The steering cardan fits perfectly. We cut it off on all sides to the fork, and instead of the shaft, we weld a bushing on each side.
So that the diameters of the engine shaft and the internal diameter of the cardan now coincide, we put a bushing on the engine shaft.

Now we put the cardan on the shaft, on which a hole was previously made on the side on one side. We drive a self-tapping screw into it to secure the assembly itself. Of course, from a mechanical point of view, everything is not so correct, but everything holds up reliably.

Now let's take a DC motor. You can buy one at Ali Express - .

The power compared to an asynchronous pump motor is almost the same - 350 W, with a supply voltage of 24 V.
We connect it to the other end of the cardan. To do this, a bushing with an external thread was welded onto the motor shaft, and onto the cardan with an internal thread.

Now we just screw one to the other.

We fix the DC motor on a wooden stand.

Now the common shaft can rotate any of the electric motors. We connect power from the solar battery and check the operation of the pump.

Installation

The soot is located almost next to the beds.

Two solar panels with a total power of 400 W and a voltage of 24 V will be used for power.

For frequent movement they are mounted on a wheeled trolley.
We take the pump and lower ourselves into the well.

We connect the inlet and outlet pipes.


Connect the power and isolate the outputs. Then, to start the centrifugal pump, unscrew the plug and fill in water for the first start.

As soon as the pump “grabs”, we screw everything back. Water flowed through the pipes. To reduce vibration, the entire structure was mounted on a piece of foam rubber.

Next, we go and water the garden as much as necessary.

Conclusion

This is an excellent solution: modify the pump to operate on low-voltage power and make it transportable. Take it with you to the dacha, and if there are no solar panels, use batteries.

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