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DRAW ON BATTERY

Yahoo Message Number: 86957
I had the Xandrex inverter replaced and thought the engine wasn't charging when running. I checked again and while running it shows 13.7 on the inverter panel. I ran the genset for three hours Saturday and charged the batteries to float charge and turned all the power off including the main switch and the batteries showed 12.7. I returned Sunday and found them now at 12.4. I ran the genset charging again for two hours and the batteries showed 12.7. I turned all the power off again. I returned this morning and found the batteries at 12.3. The coach is in storage and I turn all the switchs off including the main one in the battery compartment. Before the new inverter the house batteries would hold 12.7 for several weeks before moving to 12.6/5.

Any thoughts while I wait for a email back from Redlands Truck?

John

Allure #31242

Re: DRAW ON BATTERY

Reply #1 –
Yahoo Message Number: 86958
So Mike at Redlands Truck responded saying that it might be a bad battery (dead cell in one battery). I purchased 4 8D Lifelines about 13 months ago and they seemed to be working fine before the inverter was replaced.
My question is if I use the genset to charge the batteries (its in storage) up to 12.7 and unhook all the cables and test each battery will that tell me if I have a bad battery? I assume that they should hold 12.7 and a dead cell in a battery would show a lower reading?

Thanks for all the help this group has been a great,

John

Allure 31242

Re: DRAW ON BATTERY

Reply #2 –
Yahoo Message Number: 86959
Just reading voltage won't tell you much. A bad cell can still put out some voltage but cannot carry a load. To test a battery it needs to have a measured load put on it. That can be done with a carbon pile load resistor or one of the newer instruments that inserts a small ac voltage into the battery and measures the resistance and makes some calculations as to the health of the battery.

Don

'02 Intrigue #11427
'02 Intrigue #11427