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How to Select a Solar Bore Pump

Home > Blog > Bore Pump Blogs > How to Select a Solar Bore Pump

How to use the Solar Pump Selector

First you need to go to the SolarPak Selector here:

Feel free to click the above link as it will open up a new tab and you won’t have to click back and forth to this page.

You will see the following screen below (fig 1)

solar pump selector

You will see that the page is set for Standard US (feet and gallons) and not metric.  So if you would like to input metric (metres and litres) click the button at the top right corner that says ‘Standard US’.  The screen will now change to display in Standard Metric.  (See fig 2 below)

Step 1:

Fill in the BASIC OPERATING CONDITIONS (see fig 3 below)

First, input the Total Dynamic Head (TDH).

The TDH is the total of the 3 below:

  • Static Head (how many meters below the ground the pump will be set & how many meters above ground the water will need to go).
  • Pipe Friction Loss (how many litres per minute is travelling through a certain diameter and length of pipe). Use an online pipe friction loss calculator to make life easier. Link to calculator is here:
  • Discharge Pressure is the pressure required at the end of the line. For example PSI divided by 1.42 = meters head. kPa divided by 9.81 = m head. Solar pumps are really suited for filling tanks only. If the pump is being used to fill a tank only, then the figure for the Discharge Pressure is 0.

Secondly, input the flow needed (in Litres Per Minute or M3/h) or the volume of water needed per day.

That is all you really need to input in this section.


Step 2:

Fill in the SOLAR PANEL CHARACTERISTICS (see fig 4 below)

This section needs to be filled in.  Just fill in the:

  • Watts (Wmpp)
  • Volts (Vmpp)
  • Volts (Voc)

No need to worry about the rest if you are unsure.

If you have your own panels, then you will need to input the details from your panels.  If you would like to use our panels, then use the details below of either the 330w panels or the 440w panels.






330W Panel Details:

  • Wmpp 330W
  • Vmpp 33.8V
  • Voc 40.6V


440W Panel Details:

  • Wmpp 440W
  • Vmpp 40.8V
  • Voc 49.2V


Step 3:

Fill in the LOCATION (see fig 5)

Just click on the ‘Lookup’ button and type in your location where it says “Select Your Location”.

A selection of locations will appear.  Choose your location and click the ‘Confirm’ button on the right.

Your latitude and Longitude will automatically appear on the screen.


Step 4:

Click the blue ‘SEARCH’ button (see fig 6 below)

For this example, I have input some random details using 315W panel details and my own location.


Once the ‘Search’ button is clicked, the search results are displayed. (see fig 7 below)

All the results are clickable.

The SDSP models are the Franklin SubDrive SolarPak’s that are on the website here:

The FDSP models are the Fhoton SolarPak. These are not yet on the site, please contact me if you would like a price for any of these models.


For this example, I will choose the first option that will give me 26,364 Liters per solar day in my location.  It is the 70SDSP-1.1kw

(see fig 8 below)

You will then be taken to a page with a whole lot of pump and array details that are all printable and downloadable. (see fig 9 below)

Here you will find an overview with all the information that you need to make your Solar Pump Selection.

You can see the model of the pump, how many panels you need & how they need to be set up.

The ‘Graphs’ tab will display graphs of 1 – Flow in LPM, 2 – Average volume per day through peak solar hours in litres, 3 – Average monthly solar irradiation hours.

The ‘Replacement Parts’ tab will display all the replacement part with their part numbers for the selected model.

The ‘Dimensional Drawings’ tab will display the pump and controller dimensions.

The ‘Specifications’ tab will display the SubDrive Solar Controller Specs & Schematic, Output, PV Header, Operating conditions & Generator minimum ratings (if you are switching from generator power).


If you click on the ‘Selection Criteria’ button on the top left, you will be taken back to the first page where you input your TDH, etc.

Clicking on the ‘Search Result’ button text on the top left will take you back to the pump selection page if you would like to look at the details for a different model pump.


The End!