Based on the provided reference, certain solar pumps, specifically Sunpumps, can produce 4 to 5 gallons of water per minute in full sun.
This production rate translates to approximately 2000 gallons per day under optimal conditions with full sun exposure.
Understanding Solar Pump Production
The amount of water a solar pump can produce isn't a single fixed number. It varies depending on several factors, including the specific pump model, the amount of sunlight available, and the depth or height the water needs to be lifted (known as the "head").
According to the reference:
- Flow Rate: These Sunpumps can pump at a rate of 4 to 5 gallon per minute when in full sun.
- Daily Volume: This rate allows for approximately 2000 gallon per day.
- Head: The reference mentions that these pumps can handle a maximum head of 100 ft (or 43 psi). A slower rate pump variant can handle a head up to 200 ft (or 86 psi), indicating that higher lift requirements often result in lower flow rates.
Key Factors Affecting Output
- Sunlight Intensity: Solar pumps rely directly on solar power. Production is highest in full sun and decreases on cloudy days or during early morning/late afternoon.
- Pump Model: Different pump models are designed for varying flow rates and maximum heads. The reference highlights that pumps designed for higher heads (like the 200 ft option) may have a slower rate.
- Total Dynamic Head: This is the total vertical distance the water needs to be lifted plus any friction losses in the piping. Higher heads require more energy, which can reduce the flow rate for a given pump size and power input.
Example Production Based on Reference
Here's a quick look at the figures from the reference:
| Condition | Rate (per minute) | Approx. Daily Volume | Maximum Head | Pressure (psi) |
|---|---|---|---|---|
| Full Sun | 4 to 5 gallons | ~2000 gallons | 100 ft | 43 psi |
| (Slower Rate) | - | - | 200 ft | 86 psi |
Note: The daily volume is based on pumping during daylight hours in full sun.
In summary, based on the provided reference, a typical Sunpump in full sun can produce about 2000 gallons per day, operating at a rate of 4 to 5 gallons per minute, with capabilities varying depending on the required lift height.
