ML350 BTC Operating Voltage
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Newbie
Joined: Oct 2012
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ML350
ML350 BTC Operating Voltage
What is the normal operating voltage measured at the cigar lighter? I've been monitoring the voltage using a digital voltmeter and have found that the voltage can range from 12 volts to 14.7 volts no matter what the engine loading. Most other cars (domestics) that I have measured seem to run around 13.5 volts steadily. Since I am planning to install a ham radio transceiver that expects 13.5 volts I need to know if this is normal operation for the ML or do I have a charging system issue?
Super Member
Joined: Dec 2009
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From: USA
10 speed bicycle
Yes that sounds pretty normal. Part of the BLUE EFFICIANCY is a modified charging strategy. The CDI control unit will command minimum charging output during acceleration and cruising when possible. The CDI will command maximum charging output when you are in a state of decel. This in a sense is like regenative charging and allows lower fuel consumption.
Thread Starter
Newbie
Joined: Oct 2012
Posts: 3
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ML350
Thanks for the input. Since the car is new my guess was it's some new charging strategy. Fortunately, low battery voltage is a common issue with ham radio installations and there are several solutions out there. They are DC/DC converters that maintain a 13.6 volt output regardless of the input, at least until it drops below a safe level for starting the vehicle. Guess I'm in the market for one now!
Thanks very much for your help,
Harold
Thanks very much for your help,
Harold
