Installation Instructions for the MOTORIZED Simple Pump System
Recommended Operating Environment and Applications
DC motors operating in ambient temperatures above 100 degrees F lose operating efficiency -- the hotter the ambient temperature, the less efficient. If the temperature at the planned site regularly peaks above 100 degrees F, we recommend operation of the motor in shade.
Consistent Source of DC Power
As with any DC motor, precaution must be taken to prevent operation under low voltage conditions -- below 11.5V with the 12VDC model, 23.5V with the 24VDC model.
Applications: What Works?
Ideal Application to Minimize Wear
Ideally, when pumping from any significant depth, you should not operate the Motorized System (LBLD Option) configured to pump into a pressurized system. The most difficult part of delivering water to a pressurized system is moving it out of the well. Once at ground level, the water can be delivered by a booster pump available at a fraction of the cost of the Motorized System (LBLD Option). The only other additional cost is the tank for ambient storage, i.e., not under pressure.
The water lifted out of the well is pumped into the ambient storage tank by the Motorized System. Booster pumps designed specifically to pump into a pressure tank are available from a number of vendors, many for under $150 (US). The vendors who supply these include Dankoff, Surflo and Jabsco.
A 500 gallon (liquid US) storage tank is available from a number of vendors for around $200.
Configuring like this also raises the overall reliability of the system. Most notably, booster pumps include an integrated pressure sensor. It signals the booster pump to turn the pump on and off, according to a target pressure, when water is demanded from the pressure tank.
By contrast, any Simple Pump provides water in pulsed delivery, and therefore varying pressure, making the task of regulating flow to the pressure tank more difficult.
Supplying Power Reliably
The task of supplying power above the 11.5V and 23.5V (for 12VDC and 24VDC systems) thresholds is more complex than many anticipate, particularly with solar-powered systems. Because most configurations using the Simple Pump Motorized System are powered using solar panels, only solar is discussed in this section.
Keeping voltage above 11.5 or 23.5 volts seems simple: Provide enough power, with a device to regulate its delivery. However, a number of factors influence what constitutes “enough power” when considering how to configure an off-grid application:
If this is more complex than you planned, there are alternatives.
Anyone with NABCEP (North American Board of Energy Practitioners) certification, and experience configuring off-grid systems, is almost certainly qualified to help. However, while all NABCEP-certified professionals must learn about off-grid systems, most pursue grid-tie solar systems -- a very different field. This is why it is important to ask about recent experience.