The best hydrogen kits on the market have a relay. A good kit should have a HHO relay with instructions oh how to wire it to the engine. It is a vital part in the HHO kit that connects to your vehicle, engine and hydrogen system. Always consider a HHO relay as a means to isolate your HHO generator kit if current draw or amperage is a concern.
When you hook up an HHO generator kit the relay should help protect from too much current draw but a HHO pwm is also a vital part to consider along with a relay. A good set of plans will usually include a relay or HHO pwm when showing you how to build a HHO generator kit.
 HHO Relay 70 AMP 12V Hydrogen Generator Heavy Duty US $12.00 |
 Wiring Kit HHO System Hydrogen Generator relay fuse US $30.00 |
 energy systems RELAY COIL SWITCH 80 AMP 12 volts DC US $17.98 |
 12 Volt 30 40 Amp Relay for HHO Hydrogen Generators US $8.00 |
 HHO Water4Gas Hydrogen 12V 40 30 Amp Relay with Socket US $6.99 |
 2007 Saturn Relay 3 OBD Fuel Saver HHO Kit EFIE US $89.95 |
 2007 Saturn Relay 2 OBD Fuel Saver HHO Kit EFIE US $89.95 |
 2007 Saturn Relay 1 OBD Fuel Saver HHO Kit EFIE US $89.95 |
 2006 Saturn Relay 3 OBD Fuel Saver HHO Kit EFIE US $89.95 |
 2006 Saturn Relay 2 OBD Fuel Saver HHO Kit EFIE US $89.95 |
 2005 Saturn Relay 3 OBD Fuel Saver HHO Kit EFIE US $89.95 |
 2005 Saturn Relay 2 OBD Fuel Saver HHO Kit EFIE US $89.95 |
