The 75 and ZT Owners Club Forums - View Single Post

pletevl · 24th November 2019, 10:50

Hi all.
I posted a few weeks ago about my battery going flat.
3 weeks ago I bought a brand new Bosch battery. It was giving out 12.7 volts when I unpacked it.
I haven't used the car for a week so decided to check it today. Its down to 11.7 volts.
My alternator is pushing out 14.6 volts.
I've checked the power consumption with the car all locked up and if I remember correctly it was drawing 18 miliamps.

Is my alternator killing my batteries? This is my 3rd one in as many years.

The last one before the Bosch was a Halfords one. It's charged up sat in my garage and is holding its charge.

Anyone know what's going on?

Can an alternator give 14.6 volts and not charge the battery????

Pete.

24th November 2019, 10:50	#1
pletevl Posted a thing or two rover 75 cdti(rhd), MG ZR(lhd), MG TF(lhd), MG TF(rhd), mini mpi (lhd), Renault megane III (awful) Join Date: Mar 2014 Location: East of France Posts: 1,278 Thanks: 124 Thanked 114 Times in 93 Posts	Alternator output. Battery dying Hi all. I posted a few weeks ago about my battery going flat. 3 weeks ago I bought a brand new Bosch battery. It was giving out 12.7 volts when I unpacked it. I haven't used the car for a week so decided to check it today. Its down to 11.7 volts. My alternator is pushing out 14.6 volts. I've checked the power consumption with the car all locked up and if I remember correctly it was drawing 18 miliamps. Is my alternator killing my batteries? This is my 3rd one in as many years. The last one before the Bosch was a Halfords one. It's charged up sat in my garage and is holding its charge. Anyone know what's going on? Can an alternator give 14.6 volts and not charge the battery???? Pete.