12 volt questions, how much is good?
LED burned up last night. Stunk pretty good. I get 13.1 volts when checking the voltage where a LED connects into a 921 bulb base. Question 1 Is 13.1 a good number? Question 2 If...
Forum Discussion
wcjeep wrote:
Each cell in a normal lead acid car battery is 2.1V DC. Multiply by six cells gives an average sitting voltage of 12.6v DC for the average lead acid battery. Charging systems are usually above 13V DC. Typically one may expect the charging voltage to be 13.2V DC to 14.7V DC. I've also read manuals to say the max should be 14.4V DC.
There are many slight variations. The numbers stated above are only a ballpark figure.
Remember, we usually discuss deep cycle RV/GC LA batteries here. Think 15.5v from temp compensated solar charging in the winter, 2.58333+v per cell.
