I install the HHO Generator in my 1994 Chevrolet Silverado Extended Cab. I used a 40 Amp Relay to power the two HHO generators, protected with a 30 amp fuse.
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HHO Gas Hydrogen Generator Demo Unit
This is an original demo unit we used when we first started developing and testing on-demand hydrogen generation systems. It uses SS drains and creates incredible convection currents along with a decent gas production.