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I have installed a dual battery isolator but main battery is now not being charged.
Instructions mention if the alternator requires external excitation voltage then the battery isolator needs a modification.Apparently internal diodes in the isolator block the external excitation voltage to the alternator.
Does anyone know if the ej22 Hitachi alternator requires this external excitation voltage to operate normally?

Lib alt requires a ign reference voltage same as L series.
Steve

thanks, have now wired in a relay which charges both batteries