As I understand it a SWG output is stated/based upon 24 hour run time at full power. If this assumption is correct then we should base our sizing of the SWG of our pump run time in a day.
My pool is 17K Gal and pump run time is 8 hours. 8/24 = 1/3 of the day. So I'd be looking at a unit that 3 times bigger than my pool approximately.
Is this logic sound?