We filled our pool Easter Weekend for the first time ever and ran the pump at about 1800 rpms for about 12 hours a day for the first month. This amounted to about 1000w per hour and our electricity bill wasn't that bad (we pay about $.116 per kWh). After that first month, I started using the Legend pressure side cleaner daily and jiggered with the pump schedule and we started using the spa regularly.
This month's bill was for over 2500 kWh which is double what last month's was and while we turned on the AC, we had lots of energy efficient items added (window film, duct repair, radiant barrier and tons of blown insulation) which should have reduced our AC use significantly. To put it in perspective, the use last month was as high as it was last summer when we had 100+ days of 100 degree weather. I am wondering if I am not calculating the pool energy use correctly or if I was sold a bill of goods by the efficiency folks (or both).
Would someone mind checking my math?
Here is a breakdown of my pumping schedule and costs (I used the wattage reflected in the "Status" window of my panel for the Intelliflo for the low, high and spa speeds and the booster is just amps*volts from the badge on the booster pump):
Low Speed 9hrs/day * 300w/hr = 2700w/day * $.116 per kWh /1000 = $.3132/day
High Speed 3hrs/day * 1000w/hr = 3000w/day * $.116 /1000 = $.348/day
Booster 3hrs/day * 1495w/hr = 4485w/day * $.116/1000 = $.52026/day
Total daily cost is $1.18146 * 365 /12 = $35.94 and 310 monthly kWh
Spa runs at 3450w and a 2 hour session is 6900w * $.116/1000 = $.80. Let's say we had 15 days of use so $12.
I am no math magician but it still seems we should be using less than $50/mth in electricity. Can I get some confirmation or someone tell me where I went wrong?