Grundfos solar submersible well pumps are ideal for off grid
applications where pumping high volumes of water from
shallow wells or pumping from wells too deep for other pumps is required.
SQFlex can pump over 70 gallons per
minute from shallow wells and lower volumes of water from
wells with static levels as deep as 800 feet.
There are 11 SQFlex models, some with
helical motors and some with centrifugal motors, to provide
the selection of the right pump for your static water level,
gallons per minute and energy input requirements.
Using the proper SQFlex controller,
these versatile pumps can be powered by solar panel,
wind turbine using DC, or from a battery bank using DC,
or can operate on AC from an inverter, generator, from
the grid or any combination of these energy sources.
Minimum DC power requirements start
at 30 volts and pump performance increases as the
voltage increases up to 300 VDC. Alternating
current 120 VAC (or 240 VAC 50 Hz) will also power the pump. Overload
protection and over/under voltage protection is a
The pump motor for all SQFlex solar
submersible well pumps draws a maximum of 8.4 amps.
Increasing the input voltage increases the pump
SQFlex controls can be combined if
more than one control feature is required for your
CU200 SQF Control
Box This controller and system monitor can be used with
solar alone or in combination with the other controls
listed here. The CU200 will allow you to add a
float switch to shut off the pump when a storage tank is
full. The system monitor displays pump operation,
full tank, input power in watts, and alarms for dry
running, overvoltage, overload and over temperature
IO 50 Simple On
Off Box A disconnect switch and enclosure for turning the
power source to the pump on and off.
IO 101 Generator
and AC Interface Box Includes an on off disconnect switch and allows operation of the SQFlex
pump from solar or a manual start AC generator, inverter
or utility connection if present.
An automatic transfer switch reconnects the DC power
source when the AC power stops. Note that the SQFlex will not operate if a GFCI
(ground fault) is
in the AC supply
IO 102 Wind
Generator Interface Box If wind energy is a viable resource at your well,
the IO 102 is used exclusively for a wind turbine to
supply energy to the pump.
Water Level Switch The water level switch interfaces with the CU200
control and requires only 15 mA. The switch can be
located as far as 1,640 feet from the pump
using a minimum #18 AWG two conductor wire.
crops and wildlife depend on an adequate supply of clean water.
The innovative, state-of-the-art SQFlex system provides both
water and the power needed to operate the pump system in remote
areas where water is scarce and the power supply nonexistent
SQFlex uses solar panels or wind turbines, or a combination
of both to adapt to the weather profile and
renewable energy resources of your well. A generator or
battery backup system can take over when renewable energy
sources are scarce.
SQFlex is more than just a pump - we can provide a complete system.
Tell us where you are located, your water table depth and
estimated water needs, and we can tailor the system for your
requirements. SQFlex is delivered as a plug-and-go-to-work solution
complete with SQF submersible pump, controllers, renewable
energy, easy to install, operate and
A two year warranty is
standard. A five year warranty is available as an
extra cost option.