Curtis 1238e-6521 HPEVS 72V 550 AMP Controller

$1,535.00 USD
Shipping calculated at checkout.



Curtis 1238e-6521 AC controller that operates at 48-80V. It can draw up to 550A producing up to 47 HP and 69 ft-lbs of torque. This kit works very well in small, lightweight applications such as small boats, dirt bikes, ATVs, golf carts, kei cars and microcars. Features include regenerative braking as well as an idle function. At 72 volts, it makes a safer low voltage system that will give you lots of reliable EV miles. Available with after market Chill Plate adapter that allows for liquid cooling.

*Harness and Display sold separately.


  • Max Current: 550 Amps With Liquid Cooling (2 Min. Max)
  • Rated Power: 28 KW (37HP)
  • Input Voltage: 48-80 Volts
  • Length: 10.82 Inch (275mm)
  • Width: 9.14 Inch (232mm)
  • Height: 3.15 Inch (80mm)
  • Weight: 5.45 Kg, 12 Lbs
  • Adjustable Max Output Voltage: 72
  • Switching Frequency: N/A
  • Brake Input Overrides: Yes
  • Error Output Warning Indicator: Yes
  • Precharge Circuit: Built In
  • Computer Interface: Ethernet Port
  • Data Logging Capabilities: Yes
  • Tach Output: Yes 1, 2, 4, 6, 8 Pulses
  • Limp home Mode: Yes, Controller Will Derate To Keep Pack Above Minimal Battery Voltage
  • Firmware Upgradable: Yes
  • Internal Contactor: No
  • Thermal Derating: Yes, Derates After Temperature Gets Above 80 Degrees Celsius (176 Degrees Fahrenheit)
  • Reverse Capability: Yes
  • Adjustable Acceleration (Slew Rate): Yes
  • Idle Function: Yes, 500-1500 RPM (Modern Vehicles Idle from 600-800 RPM)
  • Programmable Inputs: Yes
  • Programmable Outputs: Yes
  • Terminal Stud Size: 3/8 Inch
  • RPM Sensor: Internal
  • Max Efficiency: 92%
  • Thermal Cooling: Yes, Chill Plate Sold Seperately