Our only DC return pump is the 1073.050, it maxes out at 792 gph and that is with 0ft of head. At the typical 4ft of head the flow is near 550gph. It could be run on a battery back up, but 24V is needed for full power, this adds some complexity as these systems are usually 12V, but it can be done, keeping the 2 batteries charged is the main complexity as 24V chargers are not common and fairly expensive.