i agree, cas im runnin 7 batteries off the stock 105 alternator and has never failed, and for the past week ive bin seein 15.3v wen it cool outside and the jeep has just started up, then of course it goes down to about 14.5. takes a while to charge them back after while of full tilt, but has never failed like my mechman 250 did twice already :censored: