Anyone know the details of the charging profile for a 2018 Passat 132 TSI?
During a wild storm on Saturday night here in Devonport, a group of people were supposed to come over from Sheffield (40 minutes away) for a movie night in our home theatre. I thought: what if we lose power? So, I brought out the cheapie 400W inverter (the projector has a 300 W bulb, so I thought 400W would be enough), connected it to the Passat's battery, set the car on idle – and it didn't work. The inverter didn't have enough umph.
So I started to look at the battery voltage – 12.1 volts and seemed to be falling very slowly. Turned off and started again. Same thing. Fired up my partner's 2007 Yaris – 14.1 volts independant of revs. But that level of voltage triggered the over-voltage turn-off for the inverter.
Good Lord. This is getting complicated. Forget the inverter, how is my car charging the battery?
Back to the Passat. This time, I took it for a drive first, with a voltmeter plugged into the 12 V outlet. 13.4 volts while driving, and the same when idling in the garage. What's going on? How come the charging voltage is all over the place.
Took the car on a longer drive and it seemed to settle down at 13.4 volts. However, when my partner touched the brake, the voltage jumped up to 14.8 volts for a while, then dropped back to 13.4.
So, anyone know how the charging works? Twice, at idle, without putting into gear, charging was not occurring, and the battery voltage was 12.1 volts. Driving, the battery was either at 13.4 or 14.8 volts, depending on…
During a wild storm on Saturday night here in Devonport, a group of people were supposed to come over from Sheffield (40 minutes away) for a movie night in our home theatre. I thought: what if we lose power? So, I brought out the cheapie 400W inverter (the projector has a 300 W bulb, so I thought 400W would be enough), connected it to the Passat's battery, set the car on idle – and it didn't work. The inverter didn't have enough umph.
So I started to look at the battery voltage – 12.1 volts and seemed to be falling very slowly. Turned off and started again. Same thing. Fired up my partner's 2007 Yaris – 14.1 volts independant of revs. But that level of voltage triggered the over-voltage turn-off for the inverter.
Good Lord. This is getting complicated. Forget the inverter, how is my car charging the battery?
Back to the Passat. This time, I took it for a drive first, with a voltmeter plugged into the 12 V outlet. 13.4 volts while driving, and the same when idling in the garage. What's going on? How come the charging voltage is all over the place.
Took the car on a longer drive and it seemed to settle down at 13.4 volts. However, when my partner touched the brake, the voltage jumped up to 14.8 volts for a while, then dropped back to 13.4.
So, anyone know how the charging works? Twice, at idle, without putting into gear, charging was not occurring, and the battery voltage was 12.1 volts. Driving, the battery was either at 13.4 or 14.8 volts, depending on…
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