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02-15-2007, 09:25 AM
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#1
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Junior Member
Join Date: Feb 2007
Posts: 2
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converter boils batteries, any answers?
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02-15-2007, 09:25 AM
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#2
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Junior Member
Join Date: Feb 2007
Posts: 2
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converter boils batteries, any answers?
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02-15-2007, 11:26 AM
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#3
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Moderator Emeritus
Tiffin Owners Club Pond Piggies Club
Join Date: Mar 2000
Location: Butler, PA
Posts: 1,829
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Hi ROADTREK,
Welcome aboard iRV2.
Regarding the electrical problem, the general answer is that to much charging current is being supplied to the batteries after they are completly charged. This overcharging is boiling them.
Typically single stage converters that supply a fixed current to the batteries have the problem but the newer style of 3 stage chargers automatically reduce the charging currents as the batteries approach full charge.
If you can advise what type of rig you have and the type of charger, someone might be able to give you specific advice regarding the problem.
Feel free to add your rig information to you signature so it will show up at the bottom of each post and you won't have to repeat the information all the time.
__________________
Joe & Shelly, Justin, Tyler, Alyssa | Butler PA 2008 Tiffin Allegro Bus 43QRP|Cummins 425|Honda CRV
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02-15-2007, 03:05 PM
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#4
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,519
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What Joe-K says, though generally any late model converter-charger, regardless of the number of charging stages, should not boil the batteries. The availability of inexpensive electronics has made it practical for even low-priced chargers to do a halfway decent job of charging and power regulation, usually sufficient to avoid boiling away the electrolyte. A better grade of charger is still worth the extra money, though, since a quality three stage charger will both charge faster and extend the battery's useful life.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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02-15-2007, 11:50 PM
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#5
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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If you have a bad battery, say a dead cell, the charger, converter or inverter/charger does not know this and will try to get the battery bank up the the set voltage. This can cause the other good cell to be overcharged thus boiling the water out of the entire bank. I would suggest that once the battery or bank is charged that you remove the surface charge and cheke the specific gravity in each cell with a hydrometer. If you find that you have a cell that is any more that a hundreth of a point less than the others the cell is at least weak and the battery is not optimum. If you find one or more cells that is really low in spacific gravity then the cell is dead and the batteries; all in that application need to be replaced. Again here are some links for those that want to know about batteries.
www.ccis.com/home/mnemeth/12volt/12volt.htm http://www.dcbattery.com/faq.html#1
http://www.usbattery.com/care.htm
http://www.windsun.com/Batteries/Bat...ery%20Charging
http://www.lifelinebatteries.com/rvgraphs.php
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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02-20-2007, 02:34 AM
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#6
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Senior Member
Winnebago Owners Club
Join Date: Dec 2003
Location: MN,USA
Posts: 651
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If you really mean boil all the previous are great answers. Be aware that it is normal for batteries to lose water when chargedd by the converter while plugged in to shore ower.
__________________
2004 Itasca Sunrise 36', Workhorse
2003 Suzuki XL7
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02-21-2007, 12:08 AM
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#7
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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A high grade three stage charger and good deep cycle batteries in the circuit with good electrical connections will rarely have to have water added to the cells. The caps of the cells are designed so that hydrogen can off gas but the water condenses on the cap and drips back into the cell. Although I check the water level monthly, I have only added water twice in five years to the 4 six volt deep cycle batteryies. I have equalized the batteries and this is when I loose some water, but even then not much.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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