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01-07-2017, 09:36 AM
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#1
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Senior Member
Monaco Owners Club National RV Owners Club Workhorse Chassis Owner
Join Date: Dec 2013
Location: St. Charles MO
Posts: 4,920
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Wet Cell and AGM
Ok I have for yrs. been with the understanding that you should not combine Wet Cell batteries and AGM in parallel circuits and when using chargers. I need to replace my chassis battery on my Dolphin it is currently a wet cell and my house is 2 6v deep cycle batteries and will too need to be replace them probably in the spring. Can I buy a AGM for my chassis starting battery and keep my wet cells for my house? Is it ok for the onboard charger and the rare occasion of needing to combine them when needed for emergency starting if they are different type of batteries?
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2002 Monaco Windsor 40PST 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo, TireSafeGuard TPMS
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01-07-2017, 11:33 AM
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#2
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Senior Member
Monaco Owners Club National RV Owners Club Workhorse Chassis Owner
Join Date: Dec 2013
Location: St. Charles MO
Posts: 4,920
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Wet Cell and AGM
Well after doing some research all my thoughts were the case. It is not advisable and the alternator and charger are probably designed for wet cells and to not mix. My biggest concern was about the charging not so much the possible need to use the combiner.
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2002 Monaco Windsor 40PST 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo, TireSafeGuard TPMS
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01-07-2017, 12:21 PM
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#3
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Senior Member
Entegra Owners Club Spartan Chassis
Join Date: Mar 2009
Location: Kerrville, TX
Posts: 320
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Quote:
Originally Posted by tmw188
Ok I have for yrs. been with the understanding that you should not combine Wet Cell batteries and AGM in parallel circuits and when using chargers. I need to replace my chassis battery on my Dolphin it is currently a wet cell and my house is 2 6v deep cycle batteries and will too need to be replace them probably in the spring. Can I buy a AGM for my chassis starting battery and keep my wet cells for my house? Is it ok for the onboard charger and the rare occasion of needing to combine them when needed for emergency starting if they are different type of batteries?
iPad using iRV2 - RV Forum
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Generally the inverter charger allows you to select the type of battery you want charged from the inverter side. The vehicle alternator should not care. However, if your system has a battery combiner for use with the inverter side I believe mixing battery types could create a problem. The way AGM battery is charged is different than a flooded battery. I considered a similar arrangement but came to the conclusion it best to have all batteries flooded or AGM and not mix and match. However, I found no evidence having house one type and the chassis another created a safety issue but would most likely shorten the life of one or both battery banks.
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01-07-2017, 04:20 PM
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#4
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Senior Member
Monaco Owners Club National RV Owners Club Workhorse Chassis Owner
Join Date: Dec 2013
Location: St. Charles MO
Posts: 4,920
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Quote:
Originally Posted by rorr1821
Generally the inverter charger allows you to select the type of battery you want charged from the inverter side. The vehicle alternator should not care. However, if your system has a battery combiner for use with the inverter side I believe mixing battery types could create a problem. The way AGM battery is charged is different than a flooded battery. I considered a similar arrangement but came to the conclusion it best to have all batteries flooded or AGM and not mix and match. However, I found no evidence having house one type and the chassis another created a safety issue but would most likely shorten the life of one or both battery banks.
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Yep just just bought another wet cell for the chassis. I do think my inverter charger does have that selection as you say.
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2002 Monaco Windsor 40PST 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo, TireSafeGuard TPMS
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01-07-2017, 04:32 PM
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#5
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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My starting batteries are low maintenance wet cells, the house batteries were AGM's. The inverter charged all of them and was set for AGM's.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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01-08-2017, 11:41 AM
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#6
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Senior Member
Country Coach Owners Club
Join Date: Jan 2014
Location: Medford, OR
Posts: 744
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My setup is the same as Deans ... wet cell starter batteries, AGM house batteries. Inverter/Charger set for AGM. Chassis battery charge is maintained by the alternator or by the Echo charger.
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2007 42' Country Coach Intrigue #12149 CAT C-13, 2014 SRX, Roadmaster Sterling, SMI AirForceOne
FMCA, Good Sam, CCFI, CCI, NWCC
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01-09-2017, 07:16 PM
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#7
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Senior Member
Join Date: Jan 2013
Location: Rural Independence, OR
Posts: 951
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The charging profile is near identical for wet cell GC2 batteries and Fullriver AGM batteries.
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2013 Leisure Travel Vans Unity U24MB, 635 watts solar, 440 AH batteries, 2000 watt inverter, Koni struts and shocks, Hellwig rear anti-swaybar, SumoSprings front and back, 2012 Hyundai Accent SE, Blue Ox baseplates, Aladdin towbar and Patriot
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