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A typical single speed pool pump for an above ground or in ground pool is going to be anywhere from about 1HP ~750 watts for smaller pools up to around 3 HP ~2250 watts or multiple pumps for larger pools. With changing energy star guidelines many of these older single speed pumps are being replaced with variable speed pumps so it is not uncommon to see variable speed pool pumps using around 250-500 watts when only being maintained but it all depends on the flowrate you need for filtration for the given size. So if you had a typical residential swimming pool of around 25000 gallons you would want to turn that over at least once every 24 hours so you would need a pump flow rate of at least 18 gallons per minute which would pull about 75-100 watts for a 2.5HP pump running about 1/4-1/3 of its max speed depending on the efficiency of the pump so it would be easily doable with the right setup.
Thanks for help with the calculations! One thing that makes a huge difference is a pool cover. That keeps most of the dirt out f the pool so you don't need to filter as much.