SQFlex Setup and Sizing

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Battery Bank
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Charge Controller
Sizing guidelines are provided for the pump, solar panels, and battery bank.
Follow the given instructions to size your system.
Selecting the Pump Model
1. Calculate the total dynamic head (TDH) of the system as you would for a normal water supply application
2. Determine the required flow rate
3. (Refer to Chart A). Locate your calculated total dynamic head in the “Head” column on the left. Follow
the chart to the right and select the pump model which provides the desired flow rate at that head.
Sizing the Solar Array
1.
Enter the number of run-time hours per day (for normal household use, enter 2)
2. Multiply by 8.4 for maximum pump current draw and battery losses
x 8.4
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3.
Enter average sun hours per day in your area (from chart B)
4.
Divide line 2 by line 3 to get total solar amps required
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5.
Enter peak amp rating of solar panel (2.07 for GF65C)
6.
Divide line 4 by line 5
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7.
Round up to next higher whole number
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8.
Enter number of panels in series needed to achieve 48 VDC (2 for GF65C)
9.
Multiply line 7 by line 8. This is the total number of solar panels required
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Sizing the Battery Bank
1.
Enter the result from line 2 above
2.
Enter number of consecutive days without solar power you need
3.
Multiply line 1 by line 2
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4. Multiply by 2 for allowable depth of battery discharge
x 2
=
5.
Determine lowest temperature batteries will be exposed to during use
Enter temperature correction factor (from chart C)
6.
Multiply line 4 by line 5. This is the total battery capacity in Amp-hours for each battery required
=
7.
The total number of batteries required is equal to 48V divided by the voltage output of each battery
(4 for 12 VDC battery)
Morning Star PS15M-48V Charge Controller includes
connections for solar input, battery output, and load
output to the CU 200 and SQFlex
Batteries used should be marine or other type of
deep-cycle battery