Quote:
Originally Posted by red-beard
9 years later, I still haven't switched. I am installing a VFD. I say installing because the Hayward Tristar I installed on Friday was dead. A new one is coming on Monday.
Based on the VFD calculations, the energy savings in less than one year is equal to the price difference. And my electric prices are $0.079/kWh! $775 vs. $539. By running the motor slower, the power drops off, but the flow drops off more slowly.
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The second install took 20 minutes. Fired right up. I need to do some additional wiring and control reprogramming to make it a "2 speed" pump. If I add in some extra 120VAC relays, I can add more speeds, up to 8. I can't see the need for more than 3 or 4.
Regular - 1000 rpm rpm
Pool cleaner - 2000 rpm
Spa - 2500 rpm
Max - 3450 rpm
I can even combine pool cleaner and spa.