Our EFR-2 (Electric Fan Relay) Pro Panel is the ticket if running dual electric fans on your Hotrod, Car, Truck, or Pulling Tractor, or one large fan. Twin 40 amp relays handle the power for each electric fan or you can use both relays in tandem to power one large fan. . This panel is also equipped with an override circuit in order to add an override switch to turn the fans on sooner when you want to get a jump on some extra cooling. Twin Circuit Breakers protect power coming in and going out! 5 way power plug brings Ignition power into the relays, and directs full power out to the electric fans. The 2 way plug brings in full Battery power.