Quote:
Originally Posted by oldtamiyaphile
When PB batteries approach full charge, they become very inefficient. At their worst, the charge/discharge efficiency can fall to 50%. Newer cars may run lower voltages because of this. My Fiat runs at 12.8v, the Renault holds closer to 14v more of the time, but often you'll see it sitting at around 12.8 as well.
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I got 13 years out of my OEM dodge ram battery at 14.5'volts. My friend got 10 years out of his Interstate at whatever an ML320 charges at.
Battery inefficiency will be offset by electronics inefficiency at lower voltage. I had 24 volt machines that at 23.9 volts got right stupid. If your mileage varies, go with wha works for you. It's is just a good advice. Fuel pumps won't like lower voltage either.