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battery charging

Yahoo Message Number: 83749
It appears that I have destroyed four three year old AGM house batteries by over charging. Can anyone tell me how to check my charging system? I have an 2002 all electric coach with two inverters and four 8D batteries.
Roger Streetman
2002 Affinity 6125

Re: battery charging

Reply #1 –
Yahoo Message Number: 83760
Roger

What inverter chargers do you have? What is the recommended absorption and float voltages of the batteries, if they are Lifelines I have that somewhere. You will need to then uses a meter to check the voltages at the batteries when in both modes. I had a Xantrex Freedom 458 control board fail and it set the float voltage too high this may be your problem. If indeed it is overcharging and not heavy discharging?

Michael

2008 Allure 31683

Re: battery charging

Reply #2 –
Yahoo Message Number: 83761
Do you also have solar panels?

The first owner of our coach added two 55W Solar Panels, thru a controler that has a bad reputaion. I have noticed that our chassis battery, non AGM, seems to spit out more vapors then I expected.
I suspect that the combination of the normal charging system and solar panels, are 'cooking' the battery too much and too long. The RC7 inside controls indicate the normal charging will jump to 'floating', so I assume that is working properly. I need to find, make, the time to actually measure the at battery cook rate, with full charge and solar panels kicking in at the same time on a sunny day. And also valiate the RC7 floating charging rate.

Best of luck on your situation, they are not inexpensive!!! Smitty

04 Allure 31017
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: battery charging

Reply #3 –
Yahoo Message Number: 83766
Roger,

Not sure if your talking about your inverter/charger voltage or engine alternator voltage. With the engine running on high idle, you should see around +/- 14.0 volts at the batteries. Your inverter chargers should be close to 14.3 bulk/absorption charge and 13.3 float.

Tom

Lifeline Batteries
97 Prevost

Re: battery charging

Reply #4 –
Yahoo Message Number: 83768
What is the groups opinion of desulphation processes on AGM batteries? Have any of you experienced battery recovery or extended life after use of a desulphation conditioner?

Gerry Brown

2007 Allure 31447

Re: battery charging

Reply #5 –
Yahoo Message Number: 83772
Gerry, I have been running 8D Lifelines since January '04 and don't see any reason to do anything to them.

Don

'02 Intrigue #11427
'02 Intrigue #11427

Re: battery charging

Reply #7 –
Yahoo Message Number: 83776
If you check with the folks at Lifeline Batteries they might disagree.
They provided me with instructions 4 years ago.

Bob Wexler
SOB
 

Re: battery charging

Reply #8 –
Yahoo Message Number: 83783
Brian,

Your statement is incorrect. AGMs respond to desulphation just as do wet cell batteries. In may I sold my '04 Allure with original Lifelines on which I had nearly constantly run a desulphator. They still performed as new. Lifeline has equalization recommendations in their owners manual.

George in Birmingham
'03 Magna 6298
George in Birmingham
2003 Magna 6298