1243-4320 Sepex Controller 24-36 volts, 300 amps1243-4322 Sepex Controller 24-36 volts, 300 amps1244-5651 SepEx Controller W/ Driver 36-48V, 600 AMPS1268-5403 SepEx Controller 36-48V, 400 AMPS1268-5505 SepEx Controller 36-48V, 500 AMPS