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Don't go with that model for automotive use. It passes through the "12v" input directly to the motherboard and drives, meaning you'll be delivering ~14v with the engine running, and all sorts of ugly voltages during cranking, near-stall, etc. situations. I would highly recommend this more expensive model: ...


3

I would go with the more expensive one in this case. Typical output of a "good" system is in the neighborhood of 13.1vdc. Depending on the alternator and how much it needs to put out to recharge the battery, it could be upwards of 14vdc (or maybe a touch higher). The power output from the 12v outlet source is going to reflect what the alternator is putting ...


3

The voltage available on the "Accessory" circuits on some modern (last 10 years, at least) can be pretty stable at 12-12.5V. Ignition circuits, not so much (9-14V). To be safe, however, you should measure with a fast acting (ie, analog) voltmeter on the cigarette lighter in the following conditions: Key on, engine off Key on, engine cranking (likely it's ...



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