Our B&B EFR-2 (Electric Fan Relay) Pro Panel is the ticket if running dual electric fans on your Hotrod, Car, Truck, or Tractor. Twin 40 amp relays handle the power for each electric fan. Can also wire this panel with an override switch to turn the fans on sooner when extra cooling is needed. Twin Circuit Breakers protect power coming in and going out! 4 way power plug runs to electric fans. 2 way plug runs to Battery power.