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Running a power line out to a remote pasture or stock tank can cost more than the well itself. That is why solar water pumps have become the standard way to water cattle and livestock on land the grid does not reach. A solar pump sits in your well or draws from a water source, runs off panels at the surface, and fills a stock tank through the day with no fuel to haul and no electric bill. This guide is about picking the right pump for watering animals, using the Grundfos pumps we carry at Krato Power.
Cattle and other livestock need a steady, daily supply of water, and they need it in exactly the places that are hardest to run power to: back pastures, leased ground, rotational paddocks. Solar matches that perfectly. The sun is strongest during the day when a herd drinks most, and you store the day's water in a stock tank or cistern rather than in batteries. Pair the pump with a float switch so it tops the tank off and shuts itself down when it is full.
The result is a watering point that runs itself, costs nothing to operate, and moves with your herd if you set it up that way.
Two numbers drive the choice: how far down your water sits, and how much your animals drink per day.
As a rough planning figure, beef cattle drink on the order of 10 to 20 gallons a head per day, more in heat. A herd of 50 can easily need 750 to 1,000-plus gallons a day. Add any other stock and your irrigation, and the daily total is what sets the flow rate you need. Well depth sets how much lift the pump has to overcome.
For most remote stock-watering jobs, flow matters more than extreme depth, and running straight off solar with no inverter matters a lot. That points to the Grundfos SQFlex family, with the higher-flow SQ Series pumps as an option where you already have an inverter.
Browse the full line in the Solar Well Pumps collection.
The Grundfos 11 SQF-2 SQFlex is the one most ranchers want: up to 13 GPM, lift from as deep as 395 feet, and it runs directly on solar, with wind, battery, or a generator as backup. At $3,099.97 it fills a large stock tank on sun alone and keeps water coming on wind or backup power when the weather turns. For a deep well on a remote section, the Grundfos 6 SQF-3 SQFlex reaches up to 820 feet ($3,398.97).
SQFlex is the right answer when there is no grid and no inverter anywhere near the pasture. One pump, straight off the panels, filling a tank.
If your watering point already has a solar system with an inverter, or a grid tie you want to lean on, the high-flow SQ Series costs less. The Grundfos 22 SQ15-220 moves 22 GPM to 220 feet ($1,699.97), ideal for a large herd or multiple tanks, and the Grundfos 15 SQ10-250 gives 15 GPM to 250 feet ($1,292.04) for a mid-size operation.
Yes. Remote livestock watering is one of the most common and best-suited uses for solar pumps. The daily water demand lines up with daylight, and a stock tank stores the day's supply, so a solar pump can run an off-grid watering point with almost no attention.
Start from daily demand. Estimate 10 to 20 gallons per head per day for beef cattle, multiply by herd size, add any other use, and match that to a pump's flow rate. A 13 GPM SQFlex or a 15 to 22 GPM SQ Series covers most herds; your well's water depth decides which model.
Usually not. A stock tank acts as your storage: the pump fills it during the day and the herd draws from it around the clock. A float switch shuts the pump off when the tank is full. Grundfos SQFlex can add a battery or generator if you want water independent of the weather.
A float switch. We carry the Grundfos float switch and the SQFlex controllers that pair with these pumps, so the system tops off the tank and stops on its own.
Tell the Krato Power team your herd size, your water source and its depth, and how far it is from power. We will size a Grundfos pump and the right controller and float switch so your stock tank stays full on sun alone. Start with the Solar Well Pumps collection.