A second Xantrex XFR-20-130 power supply was purchased from Tim at Industrial Equipment Finder (telephone 866-293-8981). The power supply that he shipped works beautifully and was very clean. Each Xantrex XFR20-130 is rated at up to 20 volts and up to 130 amps, but if the outputs of the two units are put in series, then the pair of power supplies will then deliver 40 volts and 130 amps (5.2 Kilowatts). Since 1 HP equals 0.746 kilowatts, this represents about 6.97 HP. This is certainly enough power to test the air conditioning or gear shifting, and possibly to get into some trouble !!
Picture DSC00654 showing that when the outputs are put in series, and each power supply is set at about 20.5 volts (no load), then the combined output is about 41 volts.
Picture DSC00655 showing that when one power supply is set at about 20.5 volts, the second power supply is set at about 0 volts, and the throttle is activated, the amperage produced from one power supply then passes through both power supplies.
When both power supplies were set at 15 volts (30 volts total), the draw was about 35-40 amps. At these settings the motor's rpm increased to 1800-2400. The rpm sensor will next need to be fine tuned so that it will provide a steady measurement.
Important To Note, all these tests were conducted with the transmission in gear, and with the rear wheels fully rotating, to provide an active load. If the Warp 11 were not under load, it is presumed that at these higher voltages the motor rpm's would quickly red line and beyond, with damage to the Warp 11 soon to follow.
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