I am new. I recently bought a house with a pool. Lot's to learn.
I have a plaster in ground pool in Orinda, CA (SF Bay Area); somewhere between 16,000-18,000 gallons. (The previous owner said it was 11,000, but the math did not work out and I had a pool guy look at it an he gave me the numbers above. Also, the math works out to ~18,000, but not sure about the slope to the deep end.)
Anyway, I have 1.5hp primary and a 3/4hp booster. Thanks to the PG&E SmartMeter, I know that both pumps draw 1.5KW each of power when operating (total of 3.0KW). I pay an average rate of $0.27 an hour for electricity. When summer comes, and I think I will need to run the primary for ~10 hours and the boost for ~2, then this will be 15KWh+3KWh=18KWh or $4.86 a day, ~$150/month.
The pipe coming into the pump is 2" PVC.
The pipe going back to pool from the primary (through the heater) is 1.5" copper.
The pipe from the boost pump is 1.25" copper.
There are two 1" returns in the pool.
There is one 1.5" PVC in the pool that the pool sweep is connected to, but the pool sweep is 3/4" tubing.
I got a quote for an Inelliflo 4 speed + control panel for $2250 installed. This seemed high and I still have a 1.5KW boost pump in the system.
I am thinking about removing both pumps and putting in the IntelliFlo 4 speed 3050 (I found a place (Leslie's) that has it on sale for $899) and buying a Dolphin Deluxe 4 (also on sale for $899) They quoted ~$250 install for the 3050.
I figure this investment pays itself back in roughly 2.5 years (assumes running the new pump 2x as long but using 1/3 the energy and running the dolphin 9 hours per week and other changes in average monthly hours I need to run the primary pump etc). This is a very conservative estimate, but I would rather be surprised on the up-side.
Any flaws in my thinking? I realize the downsize of the Dolphin is that I need to proactively put it in and take it out, a few times a week.