My answer is yes, providing everything is wired correctly to the separate legs of the converter. Tom just added a 3rd A/C to his NP 377 and hasnít had a problem that Iím aware of. Look at the mods to the 377ís thread for his mod.
'16 Ram 3500 MC CTD Dually, 4:10 rear
'14 Ram 2500 MC CTD (gone)
'14 287BHBE (gone)
'16 North Point 377RLBH (current and hopefully last)