TD5 Alternator Charge Rate

**CraigE** · 11th February 2017, 09:37 AM

Have been having some charge issues for some time.
Finally got my older nanocom working properly again this morning.
Nanocom showing Battery Voltage Charge Rate between 12.5 - 13.7 up and down and all over the place.
Volt meter shows a consistent voltage of around 13.7.
My question is shouldnt it be charging at 14 plus volts on the Nannocom?
If so is it likely needing a new regulator?
Craig

**Pedro_The_Swift** · 11th February 2017, 10:29 AM

I have an OBD2 readout, an added volt gauge and the brake controller , and they all read different.

yes, it should hover around 14,,,

now the stuff you already know--
make sure all the earths to the engine are clean, make sure the two power connectors into the fuse boxes are tight( I got .3 of a volt by doing this--

)

**sierrafery** · 11th February 2017, 11:45 AM

I'd rule out the regulator if i was you

**weeds** · 11th February 2017, 12:25 PM

just hooked up my nanocom, 13.6-13.7 with the off flutter......but always above 13

**rangieman** · 11th February 2017, 01:56 PM

Mine is always some where above 14 v after the first start of the day and after a constant run it will drop back down in the 13`s somewhere

**CraigE** · 12th February 2017, 12:22 PM

So maybe 13.6 - 13.7 is OK? It is a bit over the place on the Nanocom down as low as 12.5, but flicks around a lot.

**sierrafery** · 12th February 2017, 07:03 PM

For me that 13.7 seems low all the way, mine goes above 14.3 after cold start even if i switch on all the hard consumers and it drops rarely to 13.8 after a long run when the battery got fully charged but it's stabile... though not nanocom reading as i have a voltmeter fitted to the binnacle

**manofaus** · 13th February 2017, 01:22 AM

max charge voltage also depends on battery condition as the alternator will vary the output depending on the voltage of the battery. Otherwise you will boil a battery jamming 14v into a dud 8v battery.

**Eevo** · 13th February 2017, 01:45 AM

only reliable way to measure voltage is using a multi meter on the battery itself.

**CraigE** · 13th February 2017, 12:31 PM

Originally Posted by Eevo

only reliable way to measure voltage is using a multi meter on the battery itself.

Yeah I thinks so too, not entirely confident with the Nanocom reading, Nanocom has had intermittent faults for 2 years now.
Having said that too the alternator and reg are original so now 16 years old. A reg kit would maybe be a prudent $50 for preventative maintenance when I get time.

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