Grundfos SQFlex Battery Backup Systems
Battery backup systems can be used with an SQFlex pumping system. These systems are typically used in applications where the pump will not be running during most of the peak sun hours of the day, or where it is impossible or imprictical to store large volumes of water. Examples include remote homes or cabins, automatic livestock waterers, and very low-yielding wells. 
Grundfos SQFlex Battery Backup Systems
• Power will be provided by the calculated number of solar panels wired to produce 48 VDC (nominal)
• Power from the solar panels will feed into a 48 VDC charge controller, which will regulate 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 (nominal) output
• Power is drawn from the battery bank and routed through an SQFlex control box (IO 100/101, or CU 200)
• Power is run from the control box to the SQFlex pump
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