SQFlex data booklet

SQFlex Solar with backup batteries
During periods of limited solar energy, the SQFlex Solar
system provides reliable water supply.
The water supply is ensured by backup batteries connected
to the system through the charge controller.
The system is connected as shown in the fig. below. .
• Power is provided by the solar panels wired to produce
minimum 60 VDC and maximum 110 VDC.
• Power from the solar panels is fed into a 48 VDC charge
controller, which regulates the current fed to the
batteries.
• From the charge controller, power passes into the
battery bank, which consists of the number of
appropriately sized batteries wired in series to achieve
48 VDC (rated) output.
• Power is drawn from the battery bank and routed
through a CU 200. Option: An IO 50 or IO 101 can be
installed to enable disconnection of the DC voltage. If an
IO 101 is installed, it is possible to add a generator to
the system.
• Power is run from CU 200 to the SQFlex pump.
Benefits
The system ensures water supply during the night or during
periods of insufficient solar energy.
Other benefits:
• easy installation
• maintenance confined to periodic cleaning of the solar
panels
• few and simple components
• flexibility.
Note: CU 200 works with SQFlex up to 1400 W. CIU 903
works with any SQFlex up to 2500 W.
kWatt
16
17
11
12
6
19
1
4
5
18
7
3
2
TM034232
SQFlex Solar with backup batteries
Pos. Description
1 SQF pump
2 Submersible drop cable
3 Cable clips
4 Straining wire
5 Wire clamps
6 Solar panels
7 Support structure
11 CU 200 SQFlex control unit
12 IO 101 SQFlex switch box (optional)
16 Charge controller
17 Batteries
18 Pressure switch
19 Pressure tank
Note: For the number of the required solar panels, see the
sizing tool at Grundfos Product Center.
SQFlex
3
15
Applications