Solar Well Pump Systems for Reliable Water Supply on Rural Properties
On most rural properties across New South Wales and Queensland, water is the one thing that cannot be allowed to stop. Stock still need to drink on the days the diesel runs out, and the house tank still needs filling when the windmill has been sitting still in a week of calm weather. A solar well pump takes that uncertainty out of the picture by turning the one resource rural properties have in abundance, sunlight, into a steady water supply.
At CW Rural Power & Electrical, we install and service solar well pump systems on properties throughout NSW and QLD, including plenty that sit well beyond the reach of mains power. This guide covers how a solar well pump works, what determines whether it will keep up with your property, and what to think about before putting one in.
What Is a Solar Well Pump?
A solar well pump is a water pump that draws its power from solar panels rather than mains electricity, a generator or wind. In most rural installations it is a submersible pump, meaning the pump itself sits down inside the well below the water line and pushes water up the riser pipe to the surface.
From there the water usually goes into storage: a header tank, a poly tank near the house, or a trough system out in the paddock. That storage is what makes solar pumping so well suited to rural properties. The pump does not need to be running at the moment you turn on a tap, it just needs to move enough water into the tank across the day.
Solar well pumps sit alongside the other pumping work we do for rural clients, and the design principles overlap closely with a standard solar water pump setup drawing from a dam or river. The main difference with a well is depth and the pressure that comes with it.
How a Solar Well Pump System Works
There are three core parts to almost every solar well pump installation, plus one optional addition.
Solar Panels
Panels are mounted near the wellhead, usually on a ground frame rather than a roof, and convert sunlight into direct current electricity. The number of panels is dictated by how hard the pump has to work, which comes down to how far the water has to be lifted and how much of it you need each day.
Pump Controller
The controller sits between the panels and the pump. It regulates the power going to the pump so it runs efficiently through changing light conditions, and it protects the pump from voltage swings. Just as importantly, it provides dry-run protection, shutting the pump down if the well draws down faster than it recovers.
Submersible Pump
The pump sits below the standing water level in the well. Submersible pumps are used for well and bore work because pushing water up is far more efficient than trying to suck it up from the surface, particularly once depth increases.
Battery Storage (Optional)
Where a property needs water moving outside daylight hours, or where storage tank capacity is limited, battery storage is added so the pump can run at night or through extended overcast periods. Many properties do not need this at all, and adding tank capacity instead is often the cheaper answer.
Why Rural Property Owners Move to Solar Well Pumps
- No fuel runs, no fuel bills - A diesel pump needs someone to drive out, refuel it and start it. Solar removes that job from the weekly routine entirely.
- Far less mechanical servicing - Diesel pumps and windmills have a lot of moving parts and a lot of wear. A solar well pump system has very few by comparison.
- Water security through dry stretches - Sunlight is at its most reliable exactly when demand is highest, through hot dry summer months when stock water use peaks.
- No grid connection required - Running mains power out to a well is often prohibitively expensive for what is a single pump. Solar sidesteps that cost completely.
- Quiet and unattended - The system runs on its own during the day without noise, exhaust or supervision.
- Scales with the property - Additional panels or a larger pump can be specified if water demand grows.
Sizing a Solar Well Pump Correctly
This is where most of the value in a professional installation sits. An undersized system will not keep the tanks full through summer, and an oversized one means paying for capacity that will never be used. When we assess a well for a solar pump, these are the numbers that matter.
- Standing water level - How far below the surface the water sits when the pump is not running. This sets the starting point for the lift.
- Drawdown - How far the water level drops while the pump is running, and how quickly the well recovers. A well that drops rapidly needs a pump matched to its recharge rate, not just its depth.
- Total head - The full vertical lift from water level to the tank inlet, plus friction losses through the pipe run. This is the figure that really determines the pump and panel size.
- Daily water demand - Stock numbers, household use, and any irrigation, converted into litres per day. Peak summer demand is the number to design around, not the annual average.
- Pipe run and elevation - Long runs and uphill deliveries both add to the work the pump has to do.
- Storage capacity - How many days of water your tanks hold. Good storage capacity reduces how hard the pump needs to work on any single day and takes the pressure off cloudy stretches.
What to Consider Before Installing
Check the Well Before Sizing the Pump
If your well’s yield and recovery rate are unknown, that information is worth having before any equipment is specified. A pump sized beyond what the well can supply will spend its life cycling on and off.
Prioritise Storage Over Batteries
For most rural properties, adding tank capacity is a cheaper and more robust way to cover cloudy days than adding batteries. Batteries make sense when there is a genuine need to pump outside daylight, not simply as insurance.
Plan the Panel Location
Panels need clear sun through the middle of the day. Tree cover that seems minor in winter can shade a ground-mounted array badly at other times of year, so panel siting is worth getting right at installation.
Think About the Whole Property
If you already have, or are planning, an off grid power system at the house, it is worth looking at how the pump fits into the wider picture. Sometimes the pump is best kept as a standalone system, and sometimes it makes sense to integrate.
Use a Licensed Installer
Well pump work combines electrical installation with pump hydraulics, and getting either wrong is expensive. Licensing and solar accreditation matter here.
Why People Choose Us
At CW Rural Power & Electrical, we specialise in power and water systems for rural and remote properties across New South Wales and Queensland. Led by Chris Weaver, our team is fully licensed in both states and holds CEC Solar Accreditation, so your installation is handled by qualified people from assessment through to commissioning.
We travel to properties other contractors will not, and we understand what happens when a pump stops in the middle of a dry summer. Alongside solar well pumps, we handle off grid solar systems, battery storage, general rural and agricultural electrical work, and emergency callouts, so one team covers the property.
Get in Touch
If you are weighing up a solar well pump for your property, whether that is a new installation or replacing a tired diesel pump or windmill, we can assess the well, work through your water demand and put together a system that suits the site.
Call us today on 0483 347 898 to talk through your water needs, or get in touch to arrange a site visit and a personalised quote.
Frequently Asked Questions
How deep can a solar well pump draw water from?
Solar submersible pumps cover a wide range of depths, from shallow wells through to deep bores. The figures that matter are your standing water level and total head, which together determine the pump and panel capacity needed.
Does a solar well pump need batteries?
Not always. Many properties run the pump directly from the panels through the day and store the output in a tank, which is usually simpler and cheaper. Batteries are added where water genuinely needs to move outside daylight hours.
What happens if the well runs dry?
A properly configured system includes dry-run protection. The controller detects the drop in water level, shuts the pump down before it is damaged, and restarts once the well has recovered.
Can a solar well pump replace a windmill or diesel pump?
Yes, and it is one of the most common jobs we do. Replacing a windmill or diesel pump with solar removes the fuel costs and most of the mechanical servicing that comes with them.
How much maintenance does a solar well pump need?
Very little. Panels need occasional cleaning, and the pump, controller and wiring should be checked periodically. Installed correctly, most systems run for years with minimal attention.