Solar Borehole Pumps FAQ
Borehole Pump Information
Yes, the pump casing is made of 304 stainless steel which will prevent rust in the borehole depending on the quality of the water.
These pumps are mono pumps and work with a spiral screw which forces the water out the top of the pump casing. This allows for higher pressures and head.
All our kits are supplied with a spare screw so that when the primary screw inside the pump wears out, it can be replaced on-site without causing major downtime.
The lifespan of the screw is highly dependent on the type of water being pumped, as well as the amount of sand or dirt moving through the system.
No. There are different screws for the different model pumps; the smaller pumps will use a low-pressure screw and the bigger pumps use high-pressure screws.
This is the MAXIMUM amount of water allowed above the pump. This ensures that the water pressure on the casing does not exceed the pressure rating. It also prevents the pump from getting damaged if the water table rises.
This needs to be calculated manually, as there are a few factors affecting it—such as the elevation difference, pipe size, and the specific pump size.
No, the pump does not have a built-in non-return valve. However, one can be easily added between the pump and the pipe if needed to prevent water from running back down at night.
We require the following details:
- The total depth of the borehole
- Static water level
- Distance from the borehole to the tank
- Elevation difference
- Height of the tank
- The required flow rate per hour or per day
Yes. The most important probes are for the well. This will prevent catastrophic damage to the motor if the water level drops unexpectedly. If the motor runs dry, it will cause severe damage to the screw, bearings, and motor seals. Tank probes can be used if needed but are not critical.
Yes, you can. You would, however, still need to verify that the specific pump model will be able to deliver the required pressure and flow rate for your irrigation system.
The pump screw is the primary component that does the hard work, and it naturally wears out over time (especially if there is sand in the water). It likely needs to be replaced.
There could be a few different reasons. You should start at the solar panels and work your way back to the pump. You will need to check:
- Input voltage and amperage (DC) to the controller
- Output voltage and amperage (AC) to the pump
- All wiring connections
- The water level probes to ensure they haven't triggered a safety shutoff
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