Amarok charging voltage?

**Blugnomad** · 15-03-2016, 12:59 PM

Hi,

Does the 2015 Amarok charge at 14.2V or does it drop the charging voltage after the first few minutes?

I'm wondering if I need to fit a DC-Dc charger for the auxiliary battery?

Cheers,

Tony

**h100vw** · 15-03-2016, 01:19 PM

Originally Posted by Blugnomad

Hi,

Does the 2015 Amarok charge at 14.2V or does it drop the charging voltage after the first few minutes?

I'm wondering if I need to fit a DC-Dc charger for the auxiliary battery?

Cheers,

Tony

The voltage will likely drop as the current output falls. So highest voltage just after engine start.

I would have thought the alternator would be plenty able to charge a second battery. Especially if you don't run it flat first.

Gavin

**Blugnomad** · 15-03-2016, 02:22 PM

Hi Gavin,

A lot of new vehicles drop to 13.2V to save fuel. Some don't, they stay at 14.0 to 14.2V, I'm wondering which group the Amarok is in.

Tony

**h100vw** · 15-03-2016, 05:35 PM

Originally Posted by Blugnomad

Hi Gavin,

A lot of new vehicles drop to 13.2V to save fuel. Some don't, they stay at 14.0 to 14.2V, I'm wondering which group the Amarok is in.

Tony

You better link me up, I haven't heard this before.

Gavin

**Blugnomad** · 20-03-2016, 12:12 PM

Hi Gavin,

All the 4wd Toyotas ( google diode mod), Nissans (green wire mod), practically anything since about 2010 where the ECM controls the alternator.

Improves the emissions and the advertised fuel consumption and the sales of battery boosters for caravans and auxilary car batteries.

Cheers,

Tony

**h100vw** · 20-03-2016, 04:11 PM

Originally Posted by Blugnomad

Hi Gavin,

All the 4wd Toyotas ( google diode mod), Nissans (green wire mod), practically anything since about 2010 where the ECM controls the alternator.

Improves the emissions and the advertised fuel consumption and the sales of battery boosters for caravans and auxilary car batteries.

Cheers,

Tony

Never heard of this on a VW but I'll wait to be corrected.

Gavin

**Transporter** · 20-03-2016, 05:02 PM

Originally Posted by Blugnomad

Hi,

Does the 2015 Amarok charge at 14.2V or does it drop the charging voltage after the first few minutes?

I'm wondering if I need to fit a DC-Dc charger for the auxiliary battery?

Cheers,

Tony

Just connect the voltmeter to the fully charged battery (with the bonnet up), start the engine and observe the voltage.

**Blugnomad** · 28-03-2016, 08:12 PM

Since my previous posts I've done a long enough trip to see that the voltage settles to about 13.8V. Not enough to fully charge an auxiliary battery. Now I need to decide what boost is necessary, as it's almost enough.

Cheers,

Tony

**Transporter** · 29-03-2016, 08:43 AM

Why you don't use 12V to 12V charger? It would greatly extend the life of the second battery. Projects and RedArc are great and even allows you to connect a solar panel.