Chassis batteries needed charging.
I noticed that the chassis batteries were down to around 12.0 volts. The coach batteries are maintained well thanks to the inverter/charger system. I connected the chassis and coach batteries with a j...
Forum Discussion
Yes, with all due respect, a drop from 13v (meaning the batteries had just been on a charge cycle and is dropping back down to their normal full charge) to 12.5 is most definitely normal, especially if the batteries) are several years old. The OP's mh is an 02 and he just got the mh 3 months ago, so we really don't know how old his chassis batteries really are.
If the batteries have been charging, then it's important to let the batteries set for 2 to 3 hours without a load or charger connected to stabilize before testing. Otherwise, the reading will be high, caused by a phenomenon called "surface charge"; hence, the reading of 13v.
He measured the voltage immediately after charging to get the 13v then the next day he only had 12.5. So depending upon how old the batteries are and the amount of parasitic load that was present, the drop is definitely normal.
Ron
If the batteries have been charging, then it's important to let the batteries set for 2 to 3 hours without a load or charger connected to stabilize before testing. Otherwise, the reading will be high, caused by a phenomenon called "surface charge"; hence, the reading of 13v.
He measured the voltage immediately after charging to get the 13v then the next day he only had 12.5. So depending upon how old the batteries are and the amount of parasitic load that was present, the drop is definitely normal.
Ron
