I finally went out and measured the amps on my control panel while turning the equipment on and off. Bottom line, the scheduled runtime of my filter, cleaner, chlorinator, and control panel itself at Houston's power rates is costing me $120/month. And I'm only running the pump for 8 hours. Add in the additional pump and waterfall pump time when people are swimming, and I'm up to about $160/month. Now I understand more why my bill went from $300 to $500 this summer. My builder said the electrical use would be about $30/month. Boy was he ever wrong... Attached is the spreadsheet with the numbers.

My pool is 20,000 gallons. My pump is overkill, so I'm wondering about the return on investment of going to a smaller pump. I'm also in the process of switching from Reliant to Dynowatt and my power costs should go from .168 to .135, or $166/month to $133/month.

http://home.houston.rr.com/poldervaa...the%20pool.xls

Robert