200A solenoid for 400A and 440A controller upgrades.

SERIES CARTS NEED DIODE AND RESISTOR PERIOD.  DOESN'T MATTER WHAT BRAND CONTROLLER.

Alltrax 500A needs diode.  Alltrax 400A or less needs diode and resistor.  SERIES CARTS NEED BOTH.

Navitas controllers DO NOT need diode or resistor unless SERIES CART.