Typical Power Draw for Residential Well Pumps
A residential well pump typically draws between 500 and 2,000 watts while running, depending on the pump type, the depth of your well, and how much water pressure the system needs to maintain. Shallow well jet pumps usually sit at the lower end—around 500 to 1,000 watts—while submersible pumps for deeper wells often run 1,000 to 2,000 watts. The actual number on your pump's nameplate is the most reliable figure, but if you do not have that information, knowing the horsepower rating gives you a rough starting point: one horsepower equals roughly 750 watts.
The wattage you see listed is the pump's rated capacity under normal operating conditions. In practice, the pump does not run continuously—it cycles on when pressure in your tank drops below a set threshold and shuts off once pressure reaches the upper limit. This means your actual daily energy use is lower than the rated wattage might suggest, because the pump runs in intervals rather than all day.
Key Takeaways
- Shallow well jet pumps typically use 500 to 1,000 watts, while submersible pumps for deeper wells use 1,000 to 2,000 watts during operation.
- The pump's nameplate or manual will show the exact wattage rating; if you only have horsepower, multiply by 750 to estimate watts.
- Pumps cycle on and off rather than running continuously, so actual daily energy consumption is much lower than the rated wattage.
- Starting wattage (inrush current) can be two to three times higher than running wattage for the first few seconds after the pump turns on.
- Well depth, water table level, and system pressure all affect how hard the pump works and how much power it draws.
How to Find Your Pump's Wattage Rating
The most direct way to know your pump's wattage is to look at the nameplate attached to the motor. This metal or plastic tag lists the horsepower, voltage, amperage, and sometimes the wattage directly. If you see horsepower but not watts, multiply the horsepower by 750—a standard conversion that works for most residential pumps. A 2-horsepower pump, for example, would draw roughly 1,500 watts.
If you cannot locate the nameplate or your pump is older and the label has worn away, check your well pump manual or contact the pump manufacturer with your pump model number. Your well contractor or the company that installed the system may also have the original documentation on file. As a last resort, an electrician can measure the amperage draw with a clamp meter and calculate watts by multiplying amps by your home's voltage (usually 120 or 240 volts).
Starting Wattage vs. Running Wattage
When a well pump first turns on, it draws significantly more power than it does once it reaches full speed. This inrush current or starting wattage can be two to three times the running wattage for the first few seconds. A pump rated at 1,500 watts running might pull 3,000 to 4,500 watts at startup. This matters if you are planning a backup generator or solar system, because the generator must handle the spike, not just the steady-state draw.
Most household electrical panels and generators are designed to tolerate this brief surge, but undersized backup systems can trip breakers or fail to start the pump. If you are sizing a generator for well pump backup, add at least 50 percent to the running wattage to account for startup demand. For a 1,500-watt pump, plan for a generator rated at 2,250 watts or higher.
Factors That Change How Much Power Your Pump Uses
The depth of your well is the single biggest factor in power consumption. A pump pulling water from 25 feet down works far less hard than one pulling from 200 feet. The deeper the water table, the more pressure the pump must generate, and the more watts it draws. Seasonal changes in water level also matter—during dry months when the water table drops, your pump may use noticeably more power.
System pressure settings affect power draw too. If your pressure tank is set to maintain higher pressure (say, 60 pounds per square inch instead of 40), the pump works harder and uses more watts each time it cycles. The condition of the pump also plays a role: an older pump with worn impellers or a clogged intake screen has to work harder to move the same amount of water, pulling more power in the process. Poor water quality or sediment buildup inside the pump can gradually increase wattage draw over time.
Estimating Daily Energy Use
To estimate how much electricity your well pump actually uses each day, you need to know both the wattage and how long the pump runs. Most residential pumps cycle on for 5 to 15 minutes per day under normal household use, though this varies widely based on family size, water usage, and how often you water a lawn or garden. A pump that runs 10 minutes per day at 1,500 watts uses about 250 watt-hours, or roughly 0.25 kilowatt-hours daily.
Over a month, that same pump would use about 7.5 kilowatt-hours. At an average residential electricity rate of 12 cents per kilowatt-hour, the monthly cost would be around 90 cents—far less than many homeowners expect. However, if your well is very deep or your household uses large amounts of water, the pump may run 30 to 60 minutes daily, which would triple or quadruple that estimate. The only way to know your actual usage is to monitor your electric meter or ask your utility for a breakdown of your consumption.
When to Check Your Pump's Wattage
You should know your pump's wattage if you are installing a backup generator, designing a solar power system, or troubleshooting an electrical problem. A generator sized too small for your pump will not start it reliably, and an undersized solar array will not run the pump during cloudy days. If your electric bill has risen unexpectedly, knowing the pump's rated wattage helps you determine whether the pump itself is the culprit or whether something else in your home is drawing more power.
If your pump is cycling on and off much more frequently than it used to, or if you notice the motor running hotter than normal, the wattage draw may have increased due to wear or a pressure tank problem. In these cases, having the baseline wattage from the nameplate lets you compare against current draw and decide whether service is needed. An electrician or well contractor can measure actual amperage and tell you if the pump is working harder than it should be.
Frequently Asked Questions
How do I know if my generator is big enough for my well pump?
Your generator must handle the pump's starting wattage, not just the running wattage. If your pump is rated 1,500 watts running, plan for a generator rated at least 2,250 watts (1,500 × 1.5). Check the generator's nameplate for its rated output in watts, and make sure it is higher than this number. A generator that is too small will either not start the pump or will shut down under the load.
Does a well pump use a lot of electricity?
Most well pumps use far less electricity than people assume because they cycle on and off rather than running all day. A typical residential pump might run 10 to 20 minutes daily and cost less than a dollar per month to operate. However, very deep wells, large households, or frequent outdoor water use can push that higher. The best way to know is to check your electric bill or ask your utility for a usage breakdown.
What does horsepower mean on a well pump?
Horsepower is a measure of the pump's power output—how much work it can do. One horsepower equals roughly 750 watts. A 2-horsepower pump draws about 1,500 watts. Horsepower tells you the pump's capacity to lift water from depth and maintain pressure, but the wattage tells you how much electricity it actually uses.
Can I run my well pump on solar panels?
Yes, but you need enough solar capacity to handle the pump's starting wattage and enough battery storage to run it during cloudy days or at night. A 1,500-watt pump requires at least 2,250 watts of solar output and a battery bank sized to store several hours of pump runtime. Most solar well systems also include a controller that manages the pump's cycles to match available sunlight and stored energy.
Why does my electric bill spike in summer?
Summer spikes are often due to increased water use—watering lawns, filling pools, or higher household consumption during hot weather. Each time you use water, the pump cycles on to refill the pressure tank, drawing power. If the water table also drops during dry months, the pump works harder and uses more watts per cycle. Check whether your water usage increased alongside the electric bill.