The SPP6 (o E) is identical to the factory start kit- you will gain ZERO advantage if you already have a start kit installed. Supco has xchanged their mind about the E type- a picture of the last one I installed:
The comments by Mr Berry are not logical- while saying the E type will not work for 120 volts (which would mean the relay doesn't get enough voltage to disengage), yet the ramp up time is too short.
Quite frankly, Supco has made so many incorrect and contradictory assertions that I have stopped using, or recommending their product for RV use. If you want to run on a generator, use the factory potential relay with start capacitor.
