Mustangjewelie
Hi All,
My trailer came with an ACDelco Voyager Series Batteries ACDM24DC deep cycle battery. I purchased a Duracell battery charger + maintainer at Costco for $50. Any thoughts on how efficiently this would work with my battery? Can anyone recommend something better?
Thank you!
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dwight.hughes
Your Duracell float charger/maintainer looks like a good one.  Basically waterproof, works with all major battery types, looks simple to use.  Why are you considering replacing it?

This is the one I use and I've used them for many years with boats/watercraft:

  • Guest 2606A Portable Marine Battery Charger (12-Volt, 6-Amps, Single Output)
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sunvalleyjoe
Why are these used ? I just leave the Retro plugged in all the time. In the winter I unplug the ac for 3 or 4 days and leave one light on to drain battery then plug it back in. I have 2 Interstate batteries 12v and they are going on 5 years old. Our winter temp can get in low teens at night and this seems to do the trick .GBA!!SVJ
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dwight.hughes
Good question sunvalleyjoe.  

Your RV trailer has "always on devices" that create a parasitic load on your battery all the time causing it to be constantly draining voltage and then recharged by the trailer built-in charger.  This will wear out the batteries faster than if you disconnected your battery leads from the trailer and connected the batteries to a float charger.  A good float charger will bring a battery up to full charge, usually in a stepped manner - slowly dropping off the voltage as it nears full charge and then turning off charge entirely.  The float charger continues to monitor the batteries and applies a small trickle charge whenever they need topped off.  You can leave batteries on these chargers indefinitely without any harm to the batteries.

NOTES:

1.  Do not confuse a float charger with a trickle charger.  Trickle chargers continue to apply a small voltage to the battery all the time and will burn out a battery faster and could even be dangerous.

2.  The converter-charger built-in to our Riverside Retro trailers is not high quality.  It seems to undercharge and overcharge, the one in my unit only turns back on when the battery drops below 85% or so on my batteries and then switches on, so I never get a good full charge, and then applies a 13.5v charge which is slightly too high and over time can boil the batteries.  And besides the obvious that you have reduced on-battery capacity it actually shortens the life of your batteries by allowing sulfation, a crystalline buildup on the charge plates inside the battery that occurs when a battery remains below full charge for an extended period of time.

3.  You can actually leave your RV batteries totally unplugged for awhile, a couple months should be fine.  They naturally loose about 10% of their charge each month.  But leaving them like this too long can ruin them.

IN SUMMARY

The best answer to long term (2+ months) storage of batteries not in active use is to use a good float charger on them.  And not to leave them plugged into the trailer converter-charger for this job.  Use an aftermarket unit specifically designed for this purpose.

More info:  https://blog.gorving.com/2016/10/not-another-dead-rv-battery/

A good battery costs a lot of money, several hundred dollars.  They can last 7+ years easily and sometimes still running great 10 years on.  With proper care.  So for me it's a waterproof float charger I can connect to them while they are still on the RV (but disconnected from its battery lead).
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Mustangjewelie
Your Duracell float charger/maintainer looks like a good one.  Basically waterproof, works with all major battery types, looks simple to use.  Why are you considering replacing it?

This is the one I use and I've used them for many years with boats/watercraft:

  • Guest 2606A Portable Marine Battery Charger (12-Volt, 6-Amps, Single Output)

Thank you for your input, Dwight! You are always a huge help! I have read so many posts on caring for batteries that I got a bit overwhelmed by it all and I wasn't sure if the charger from Costco would be sufficient. I'll get it hooked up with no worries now. 😄
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sunvalleyjoe
I am confused about these chargers . Sometime back people had complained about the WFCO unit. They weren't charging the battery to full voltage. I called Interstate which has a factory warehouse in Carson City Nv. I told them what I was doing and they said I should be fine . Some people complained on this site that Interstate batteries are junk??They went to heck in less than 2 years.  On thing I did learn from owning the older Retro their wiring practices needed to be updated. BTY had Caterpillar batteries on our Jayco trailer high dollar  and they died after 3 years.?? I guess the key is maintance. GBA!!SVJ
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sunvalleyjoe
ok Dwight I see the difference between the 2 systems. Guess it is a matter of preference. I am looking in to a float system. GBA!!SVJ
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