Solar power for bore pumps is changing how many Australian graziers think about water. The big question is not if the technology works, but whether it can keep cattle drinking through long dry runs without you living at the pump shed.
Solar bore pumps can dramatically cut the risk of cattle running out of water in a drought, but they only get close to “drought‑proof” when the system is designed with good storage, backup options and realistic flow rates for your country.
Water security is now a business survival issue. Higher input costs, more frequent hot, dry spells and failed surface dams are putting real pressure on margins. In some regions, a reliable bore and the power to move that water is now worth more than having one more paddock of feed. Solar power for bore pumps is letting stations push water further and more often without chasing diesel and filters all week.
On a cattle place, “drought‑proof” does not mean “nothing can ever go wrong”. It really means pushing the risk of water failure down to “very low”. That usually looks like:
•More than one working bore supplying key mobs
• Strong tank or turkey’s nest storage at header points
• Backup pumping options, often diesel or generator
• Planning for five bad days in a row, not a perfect season
We will walk through how much water your herd actually needs, what solar pumps can move, how they compare with diesel on cost, what happens in cloudy weeks, and where full off‑grid fits in.
Yes, if the system is sized properly, solar bore pumps can out‑pump normal cattle demand on many properties, but undersizing is common and risky.
On a hot day:
• Weaners might drink around 30 to 50 litres each
• Dry cows often need 50 to 70 litres
• Lactating cows and big bulls can push higher again
If you run 300 head and work on 60 litres per day for safety, that is:
In harsher northern conditions and during heat waves, many graziers like to add 30 to 50 percent margin on top of the textbook number to sleep at night.
Solar bore pumps can move a surprising amount of water if matched to your bore and lift. As a simple example, a well‑chosen submersible on around 2 kW of solar might move somewhere in the range of 25 000 to 35 000 litres per sunny summer day at moderate head. At deeper heads, the flow drops, so design really matters.
You can think about it like this, using ballpark figures for a good bore:
• Small mob, 100 head, 60 L/day = 6 000 L/day. A modest solar pump can cover that easily.
• Medium mob, 300 head, 60 L/day = 18 000 L/day. A mid‑size solar array and pump can handle it.
• Large mob, 600 head, 60 L/day = 36 000 L/day. Now you are in bigger pump territory or multiple bores.
To match pump and panels to your herd:
1) Confirm bore yield and standing water level with a proper pumping test.
2) Calculate peak summer demand for that mob, then add 30 to 50 percent safety.
3) Size the pump and solar so it can meet that daily demand in about 6 to 7 good sun hours, not over 24 hours.
Solar tends to beat diesel on total cost within a handful of years on remote bores, and a well-designed solar system will keep troughs full through normal cloudy runs by using storage, some oversizing and smart controls.
Diesel pumps do a job, but they carry ongoing fuel, oil, filters, service trips and breakdown risk. Solar pumps are mostly upfront equipment cost plus light maintenance. To compare properly, many graziers like to think in cost per 1 000 litres pumped over a 10‑year horizon, including:
• Capital: pump, pipework, tanks, stands
• Fuel or electricity: diesel versus free solar input
• Servicing and call‑outs
• Labour time spent checking, refuelling, restarting
A simple comparison table looks like this in concept:
• Upfront: diesel often cheaper at the start, solar higher
• Fuel over 10 years: diesel high and rising with freight, solar effectively zero
• Servicing: diesel regular and hands‑on, solar light and mostly visual checks
• Breakdowns: diesel can fail from fuel issues or hard starts, solar more about occasional electrical or pump issues
For many remote bores pumping moderate volumes, the breakeven where solar has paid back its extra upfront cost often lands somewhere around the middle of that 10‑year window, sometimes earlier where diesel is hard to get in.
To work out your own payback:
1) Add up last 12 months of diesel, oil and service spend for each bore.
2) Multiply that figure by five and by ten to see your medium and long‑term exposure if nothing changes.
3) Compare those figures with a quoted solar system cost and expected lifespan to see how many years to simple-payback.
Cloudy runs are where some people worry about solar. In practice:
• Pumps still run in cloudy weather, they just slow down
• Extra panel capacity can help keep output higher on ordinary grey days
• Header tanks or turkey’s nests carry you through the shortfall
A common rule of thumb is to provide 3 to 5 days of demand in storage for critical mobs. For our 300 head example at 60 L per day:
Tank options include:
• Poly tanks: quick to install, simple to repair
• Steel tanks: good for large storage, long life if maintained
• Turkey’s nests: big volumes, but think about evaporation and seepage
Monitoring with pressure switches, float switches and simple phone or satellite alerts can help you know when something slows or stops before cattle feel it.
Solar can replace most diesel pumping on many stations, but removing every drop of diesel is risky unless you have multiple backups and strong design.
Solar power for bore pumps works very well on:
• Main production bores feeding header tanks
• House and shed water and power on remote homesteads
• Transfer pumps pushing water to outlying tanks and troughs
A common pattern is moving from several standalone diesel bore pumps to a network that might look like:
• Several key bores on solar, each with good storage
• One or more header tanks able to feed multiple paddocks
• One hybrid site with both solar and a generator or diesel backup
This can reduce fuel runs, cut labour time spent at pumps and improve water reliability across the place.
Many graziers still keep diesel on hand for good reasons:
• Breakdowns, lightning or storm damage taking a solar site out
• Longer than planned cloudy spells during peak demand
• Animal welfare, compliance and market reputation
Often the safest approach is a hybrid strategy. For example, a large property might run multiple solar bores into central header tanks, then keep one mobile diesel pump or generator ready to hook in anywhere the system is stressed. Through a dry year, that station could move large volumes on solar most of the time and only burn diesel for rare backup events, saving significant fuel and labour while improving peace of mind.
Yes, in most rural areas you can legally go off‑grid, but you still need to meet electrical and safety rules, and full off‑grid is not right for everyone.
There is usually no general rule that forces a rural property to connect to the grid. Local council and network rules may come into play when:
• Building new dwellings
• Doing subdivisions or major extensions
• Connecting big loads that might affect the local network
Any solar‑battery or off‑grid power system must still be installed by a licensed electrician and meet the relevant standards.
Full off‑grid does not suit:
• Properties with easy, cheap grid access
• High‑value, power-hungry operations like large workshops or cold storage that need very high reliability
• Owners who are not comfortable managing batteries, generators and basic system checks
• Situations where cash flow is tight and future battery or inverter replacement would be a strain
A safer way to decide is to:
1) Map all current and likely future loads, including bore pumps, homestead, sheds and any processing.
2) Compare full-life costs of three paths: staying grid‑connected, going hybrid with solar and batteries, or going fully off‑grid.
3) Stress‑test each option against drought, lower beef prices and higher interest so you know which one you can live with when things tighten.
Yes, many Australian cattle and mixed farms now rely on solar for daily pumping, and the right size system always comes back to your bore, your head and your herd numbers.
Across the NT, QLD, WA and southern states, there are plenty of properties running breeder herds, backgrounders or mixed grazing and cropping with solar bore pumps doing the bulk of the work. Typical patterns include:
• A breeder herd on a deep bore, once run on diesel, now on solar with generous tank storage and a single diesel kept as backup
• Mixed farms using solar to supply both stock water and spray water, tied in with existing dams and a leftover diesel pump for emergencies
Common lessons from these setups:
• Bigger storage makes life easier than “just enough” tank
• Strong stands, quality cable and rodent protection avoid annoying faults
• Remote monitoring saves long drives to find a simple float switch issue
To ballpark your own system size:
1) List peak summer stock numbers for each watering point.
2) Multiply head count by daily litres per head, then add a safety margin.
3) Use bore logs and pumping test data (depth, standing level, yield) to estimate pump size and solar array needs with a designer.
At AusPac Solar, we work closely with graziers across Australia, especially in remote and rural areas, to design off‑grid and hybrid solar‑battery systems that keep water and power as steady as possible when the season turns against you.
The practical next step is simple: look at your current water risks, gather your bore and diesel history, and start asking the real question that matters for your place: What size solar system do I need for my bore pump?
If you are ready to cut running costs and make your water supply more reliable, we can design a tailored solar power for bore pumps solution that fits your property. Our team at AusPac Solar will assess your site, explain your options in plain language and provide a clear, itemised proposal. Reach out to us today so we can help you plan a system that works efficiently in Australian conditions and supports your long-term water needs.
