Take volts x amps = watts, watts / 1000 = kilowatts, kilowatts x hours running = KWH's (kiolwatt/hours), KWH's x your electric cost per KWH = cost.
You can figure it by any time frame you want (hour, day, week, month, etc.). It gets a little trickier if your electric utility has stepped rates. Then you have to figure out when the pump will be running and what the breakdown of charges will be.
Hydraulics play a big role.
We have fairly long runs (~120ish foot on average) for returns, skimmers and drains so we used (2) 2” inch lines for skimmers, (2) 2” inch lines for returns and (1) 3” inch line on main drain - for each pump - to keep head loss to a minimum.
Running the pump at lower rpm has a dramatic affect on the watts vs gallons moved.
We have kind of settled on 2,000 rpm for 24x7 run time.
All that said, this is functionally just another data point as head loss varies from pool to pool.
The flow-vis shows 45 gpm while using 441 watts of power. So 9.8 watts per GPM?[emoji38]. Is that even a thing?
So two of these pumps running 24/7 moves about 130k gallon per day.
882 watts per hour at 8 cents a kWh = $1.69 a day.