Forum Discussion

LeBout's avatar
LeBout
Explorer
Mar 30, 2019

Checking voltage on connected 6 volt batteries

When checking the voltage on linked 6 volt deep cycle batteries is it important where the leads from the voltage tester are contacting the batteries? In other words, can the testing be done on one battery alone when they are linked?
  • To get the paralleled voltage of the two 6s, you need to do the pos of one battery, and the neg of the other.

    Jerry
  • LeBout wrote:
    When checking the voltage on linked 6 volt deep cycle batteries is it important where the leads from the voltage tester are contacting the batteries? In other words, can the testing be done on one battery alone when they are linked?


    If you are only intending to check the status of the one battery, then yes, you can test that battery by placing your leads on the posts of that battery. However, if your intent is to check the status of your entire battery bank you need to measure across both linked batteries.....negative lead on the post going to chassis ground and positive lead on the OTHER batterie's hot lead.
  • Yes, you can test voltage on a single battery when they are hooked in series. Just remember that voltage can vary significantly depending upon whether or not there is any load. If you are testing house batteries, a good idea is to be running the microwave or another high amperage appliance when testing. Also remember to have the rig unplugged and the generator not running since that would activate the battery charging functions of the converter.
  • I read your other thread to get some context of your issue. Yes, you can test the voltage on the batteries individually, but obviously you will only get a reading of the individual battery (about 6.6 volts), not the two combined.