charging voltage on a sl350 2005

[stormav]

hi can anyone tell me what voltage I should be reading on both batteries whislt the engine is running tia

 

[55AMGCLK]

Main battery should be over 14v with the car started.

 

[stormav]

Main battery should be over 14v with the car started.

any idea on the consumer battery ,and thanks for the reply

 

[55AMGCLK]

any idea on the consumer battery ,and thanks for the reply

I do not have the info for the aux batteries but I understand they only charge when they drop below a certain voltage and may not continually charge as the main battery does.