I am investigating if I can upgrade just the motors on my Pentair Challenger Pumps that are used for the jets and filter on my spa. The motors are Centurian 7-168786-07 and 7-196254-06. The motor for the spa jets draws a large amount of current when it starts because it is a 2HP pump. I am off-gris and run on solar power. Improving power effeciency is never ending goal.  Variable or 2 speed is not of any value for this application. The ultimate would be a replacement motor with a soft start. Does Pentair offer motors that are better than what I have?