[Danimal16]

I put one on my pool and it cut my electric bill in half.

There are a number of issues related to pools that the pool guys do not have a clue.

To minimize your power consumption you must understand the sizing of all of the components. The filter is the key. Use a suction type automatic pool cleaner if you can as the extra motor on the polaris type cleaners is a huge (and I mean a HUGE) energy hog. Those polaris secondary pumps can cost you darn near as much to run as it would take to have a pool man manually clean and maintain your pool.

Another key concept is to understand the concept of pool turn over. You need to size your pool equipment and run the pump to turn the pool over twice a day. The problem is that many pool owners do not understand this and most pool maintenance folks will run the pump daily for eight hours. That seems to be the general rule of thumb for the pool folks. The issue is that the eight hour rule is wrong, it is the twice daily turn over that counts. For example, my little 8000 gallon pool with a variable speed, "soft start" pump and a very oversized filter (cheap) turns over once in about 45 minutes.

With all of that said you can do the calcs yourself based upon the pump curves of the variable speed pump and the size of equipment and volumetric flow rate to get the most out of a pool and save a bundle. My pump paid for itself in less than a year. without the SCE rebate it would have paid for itself in about 15 months.