Key Takeaways
- Well pumps require high surge wattage, often 2–3x their running wattage.
- Solar generators must have sufficient inverter capacity and battery storage.
- Deep well pumps demand larger systems compared to shallow well setups.
- Proper sizing ensures reliable water access during outages or off-grid use.
Using a solar generator to power your well pump is possible with the proper sizing and calculations.
Below, I clarify what information is necessary for you to determine if any type of solar generator is capable of powering your well pump.
Here’s the layout of this guide:
Can a Solar Generator Power a Well Pump?
A solar generator can power a well pump. However, some well pumps require much more power than others. The daily power consumption of the well pump will help you correlate it to the ideal solar generator needed to run your pump daily.
The main factors you need to know in order to pair a solar generator to your well pump are:
- How much power is needed in watts (W) when the pump is on and running? This is found by multiplying volts (V) times amps (A). Knowing your well pump’s power requirements (starting surge and running watts) is essential to find out how big your solar generator needs to be.
- How many total watt-hours (Wh) are used by the pump in a 24-hour period on average?
With this information, you can find the solar generator that will meet the specifications of your well pump.
To give you a better idea of which types of pumps can be used with a solar generator, I gathered four different well pumps and broke down each one’s power requirements in terms of volts and amps.
Keep in mind that the solar generators I’ll be discussing in this post are only compatible with either 12V/10A or 115-120V well pumps. Sizing a generator for 240V well pumps is possible with a solar generator, but only a select number of models are available with 240V capabilities. One example is the Nature’s Generator Powerhouse.
4 Water Pump Examples with Power Requirements
| Water Pump | ECO-WORTHY DC 12V | Acquaer 1 HP | Little Giant 1/2 HP | Wayne 3/4 HP |
|---|---|---|---|---|
| Image |  |  |  |  |
| Model # | N/A | SJC100-1 | WE20G05P4-21 | CWS75 |
| Voltage | 12V DC | 115/230V AC | 115V AC | 120/240V AC |
| Gallons/Min | 3.2 GPM | 20 GPM | 20 GPM | 7.7 GPM |
| PSI | 130-150 PSI | 30-50 PSI | 48 PSI max | 30-50 PSI |
| Amperage | 10A max | 9.6A/4.8A | 10.5A max | 13A |
| Type | Deep Well/ Submersible | Shallow Well, Jet | Deep Well/ Submersible | Convertible, Jet |
| More Info | View on Amazon | View on Amazon | View on Amazon | View on Amazon |
The table above shows not only the amps and volts, but the gallons per minute (GPM) and pressure (PSI) needed for each pump. Another important specification is the horsepower rating because even a 1/4 HP difference can significantly affect your pump’s power consumption requirements.
The GPM and PSI will be discussed later on, but the next segment has to do with the amount of power used per day for each well pump example.
This measurement will give you an idea of how large of a solar generator you need in terms of battery size.
Solar generator batteries are measured in watt-hours (Wh) and I’ve calculated the watt-hours needed each day for the well pumps below.
The “daily run times” mentioned correlate to how much water is needed for your home/cabin/etc. Typically, the more water that is used throughout the day, the longer the running time.
How Much Power Does a Well Pump Use Per Day?
A well pump’s daily power consumption varies significantly depending on the pump type, tank size, tank pressure, plumbing fixtures in your home (or desired area of use), and how often water is used throughout the day.
Below I’ve highlighted the power consumed (in watt-hours) for the four different types of well pumps mentioned previously.
I measured their consumption by half-hour increments to give you a good idea of how much power is needed depending on how often/long the well pump is running for.
Daily Well Pump Power Consumption With Run Times
| Pump: | Eco-Worthy | Acquaer | Little Giant | Wayne |
|---|---|---|---|---|
| 0.5 hrs | 60Wh | 552Wh | 604Wh | 780Wh |
| 1 hrs | 120Wh | 1,104Wh | 1,207Wh | 1,560Wh |
| 1.5 hrs | 180Wh | 1,656Wh | 1,812Wh | 2,340Wh |
| 2 hrs | 240Wh | 2,208Wh | 2,416Wh | 3,120Wh |
| 2.5 hrs | 300Wh | 2,760Wh | 3,020Wh | 3,900Wh |
As you can see, the longer the pump is running, the difference in power consumed is significant.
Well Pump Sizing
While trying to find out how often the average residential well pump runs for every day, I needed more information from an expert.
I came across a YouTube video from a company called R.C. Worst & Co., Inc. and called them for information on my question.
After speaking to James, an employee at the company, for a few minutes, he broke down my question into several smaller parts. The first (and most important) piece of data he mentioned was…
“You need to know how much water the home uses in gallons per minute. Next is the tank pressure and size.”
James from R.C. Worst & Co., Inc.
Both of the points he mentioned in the quote above came before any mention of the type and size of pump needed for the home.
This is an important point as there are several data points needed in order to calculate which well pump will work best for the home.
Below is a video showing the data needed to calculate the type of well pump best suited for your home/cabin.
With the above data, you should have all of the information needed to find your ideal well pump.
How Long Will a Solar Generator Run a Well Pump?
A Titan solar generator (with one battery) can run a 115V Acquaer SJC100-1 well pump (at 30 minutes of pump time per day) for approximately three days with no solar input.
With 200W of solar panels at 80% efficiency and good sunlight, the Titan is capable of running this pump continuously so long as sunlight conditions remain stable.
There are several important factors to consider when calculating the length of time that a solar generator can run a well pump, including:
- Daily well pump run times
- Power consumption of the pump
- Solar generator continuous AC inverter output, inverter efficiency, battery capacity, and battery cycle life
- Solar panel setup
Clearly, well pumps, solar generators, and well pump run times vary significantly, ultimately showing that there is a lot of math involved in getting an estimate on how long the solar generator can run a well pump for your home/cabin/etc.
To give you a better idea of how to do this for yourself, below I lay out how I calculated how long the Titan can run the Acquaer pump:
The Acquaer SJC100-1 is rated at 115V, 9.6A. Since amps (A) times volts (V) equals watts (W), I multiplied 115 by 9.6 to get 1,104W. This is its power consumption at any given time.
Next I need to find its watt-hour usage. This shows how much total energy is consumed in an hour. Simply take 1,104W times one hour to get 1,104Wh.
Running at 30 minutes per day, divide 1,104Wh by two to get 552Wh. This is the daily power consumption of the well pump.
One Titan battery is 2,000Wh. The Titan’s AC inverter, which powers the wall-styled outlets on the solar generator, runs at about 90% efficiency.
This means that the inverter uses some of the battery juice for itself while powering the well pump or other AC device plugged into it. Take 90% of 2,000Wh and you get 1,800Wh of battery left to power the well pump.
Now we can find out how long the Titan’s battery will run the Acquaer pump before running out of battery.
Take 1,800Wh divided by 552Wh equals about 3.26 days of use with the Titan. At this point the Titan’s battery is depleted.
Take 3.26 days multiplied by the Titan battery’s 2,000 charge cycles and you get 6,520 days of use before the Titan battery reaches 80% of its original capacity.
6,520 days divided by 365 days equals 17.86 years of use.
Now you can solve for your well pump if you know its daily power consumption.
Solar Generator Options for Powering Well Pumps
Below are the top three solar generators for 2026, selected specifically for well pump use — chosen for inverter continuous output, surge capacity, and battery size.
| Ranking | Model | Highlights | Where to Buy |
|---|---|---|---|
| 1. Best for 1–2 HP Pumps | EcoFlow DELTA Pro 3 | – 4,000W continuous / 8,000W surge AC – 4,096Wh LFP battery (4,000 cycles) – 1,600W solar input | Amazon |
| 2. Best Runner-Up (High Surge) | Anker SOLIX F3800 | – 3,840W continuous / 7,680W surge AC – 3,840Wh LFP battery – 2,400W solar input (best in class) | Amazon |
| 3. Best for 1/3–1/2 HP Pumps | Bluetti AC200L | – 2,400W continuous / 4,800W surge AC – 2,048Wh LFP battery (3,500 cycles) – 1,200W solar input | Amazon |
The EcoFlow DELTA Pro 3 is the best solar generator for well pumps in 2026. Its 4,000W continuous / 8,000W surge output handles even 1.5 HP pump starts, its 4,096Wh LFP battery stores 3–6+ days of pump energy, and 1,600W solar input can fully recharge it in a single day of good sun.
1. EcoFlow DELTA Pro 3 — Best for 1–2 HP Well Pumps
| Pros | Cons |
|---|---|
| – 4,000W continuous / 8,000W surge — handles 1.5 HP pump starts | – Heavy at 88 lbs (needs a cart for mobility) |
| – LFP chemistry: 4,000 cycles (~10 years daily use) | – Higher upfront cost (~$3,699) |
| – 1,600W solar input — fully rechargeable in one sunny day with 4×400W panels |
The EcoFlow DELTA Pro 3 (4,096Wh) is the definitive solar generator for well pumps in 2026. Its 4,000W continuous AC output and 8,000W surge comfortably cover the starting surge of a 1 HP pump (typically 2,000–3,000W surge) and even a 1.5 HP pump (~3,300W surge). The LFP battery chemistry means it can handle this daily cycling for 4,000+ charge cycles — roughly 10 years of daily use — without significant capacity loss.
Runtime example (Acquaer 1 HP pump, 552Wh/day): 4,096Wh × 0.85 efficiency ÷ 552Wh = ~6.3 days without any solar input. With a 400W solar panel, the pump can run indefinitely on solar alone during daylight hours, with the battery providing overnight backup.
Runtime example (Wayne 3/4 HP pump, ~414Wh/day): 4,096Wh × 0.85 ÷ 414 = ~8.4 days without solar.
2. Anker SOLIX F3800 — Best Runner-Up (Highest Solar Input)
| Pros | Cons |
|---|---|
| – 3,840W continuous / 7,680W surge — handles most 1–1.5 HP pumps | – 85 lbs, similar mobility challenge to DELTA Pro 3 |
| – 2,400W solar input — fastest solar recharge of any portable power station | – ~$3,499 — similar price tier |
| – LFP chemistry, built-in wheels and telescoping handle |
The Anker SOLIX F3800 (3,840Wh) matches the DELTA Pro 3 in surge capacity and actually beats it on solar input — accepting up to 2,400W of solar simultaneously, meaning a 6-panel (400W each) array can fully recharge it in ~2 hours of peak sun. This makes it ideal if your well is in a sunny location and you want maximum solar self-sufficiency.
Runtime example (Acquaer 1 HP pump, 552Wh/day): 3,840Wh × 0.85 ÷ 552 = ~5.9 days without solar. With 2,400W of solar panels, the battery recharges faster than any alternative on this list.
3. Bluetti AC200L — Best for 1/3–1/2 HP Pumps
| Pros | Cons |
|---|---|
| – 2,400W continuous / 4,800W surge — handles 1/2 HP pumps (2,350W surge) | – Not enough surge for 1 HP pumps (which need 3,000W+ surge) |
| – LFP battery, 3,500 cycles, 47 lbs (more manageable weight) | – ~$1,499 |
| – 1,200W solar input — recharges in ~2 hours with 6×200W panels |
The Bluetti AC200L (2,048Wh) is the right choice for smaller pumps. A 1/3 HP pump typically surges at ~1,500W and runs at ~750W; the AC200L’s 4,800W surge handles this with headroom. A 1/2 HP pump surges at ~2,350W — still within the 4,800W surge limit.
Runtime example (Little Giant 1/2 HP pump, ~276Wh/day): 2,048Wh × 0.85 ÷ 276 = ~6.3 days without solar. With a 400W solar panel adding ~300Wh/day of real-world output, the pump can run indefinitely.
Important: Do not use the AC200L with a 1 HP pump. Its 4,800W surge is insufficient for pumps that surge at 3,000–4,000W. Step up to the DELTA Pro 3 or SOLIX F3800 for 1 HP and above.
How Many Watts Do You Need to Run a Well Pump?
A typical 1/3 HP well pump requires about 750 running watts and about 1,500 starting (surge) watts. A 1/2 HP pump needs ~1,000 running watts and ~2,350 starting watts. A 1 HP pump needs ~1,104 running watts and ~3,000–3,300 starting watts. All three of the solar generators above can handle a 1/2 HP pump; only the DELTA Pro 3 and SOLIX F3800 are large enough for 1 HP and above.
Can a 240V Well Pump Run on 120V?
A 240V well pump can run on 120V if it has a dual 120/240V connection. Several pumps have this feature, including the Acquaer SJC100-1 and the Wayne CWS75. Check your pump’s nameplate before purchasing a solar generator.
Can a Solar Panel Power a Water Pump?
Yes — a solar panel can power a water pump directly (using a DC pump) or via a solar generator acting as the intermediary. Pairing a solar generator with panels is the most flexible approach since it provides power at night or on cloudy days using stored battery energy.
Conclusion
Solar generators have become powerful enough to reliably run well pumps for most residential applications. Choose based on your pump size: the Bluetti AC200L for pumps up to 1/2 HP, and the EcoFlow DELTA Pro 3 or Anker SOLIX F3800 for 1 HP and above.
- EcoFlow DELTA Pro 3 — Check Price on Amazon
- Anker SOLIX F3800 — Check Price on Amazon
- Bluetti AC200L — Check Price on Amazon
Last update on 2026-09-16 / Affiliate links / Images from Amazon Product Advertising API